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Preprint REVIEW | doi:10.20944/preprints201808.0433.v1

Designing of Fermenter and its utilization in food industries

Vishwajeet Gaikwad, Anil Panghal , Shubham Jadhav, Poorva Sharma, Akshay Bagal, Akshay Jadhav, Navnidhi Chhikara

Subject: Engineering, Chemical Engineering Keywords: fermentation; bioreactor; heat transfer; mass transfer

Online: 24 August 2018 (11:34:14 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201708.0033.v1

Characterization of Petroleum Sludge from Refinery Industry Biological Wastewater Treatment Unit

Abubakar M. Ali, Mohd A. Abu-Hassan, Raja R.K. Ibrahim, Muhammad A. A. Zaini, Bala I. Abdulkarim, Ali S. Hussein, Sheila M. Su, Muhd Azril I. Mohd Halim

Subject: Engineering, Chemical Engineering Keywords: petroleum sludge; characterization; total organic carbon; metal concentration

Online: 8 August 2017 (13:24:39 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201610.0112.v1

Influence of Temperature on the Formation of Ag Complexed in S₂O₃^2--O₂ System

Aislinn M. Teja-Ruiz, Julio C. Juárez-Tapia, Leticia E. Hernández-Cruz, Martín Reyes-Pérez, Francisco Patiño-Cardona, Ivan A. Reyes-Dominguez, Mizraim U. Flores-Guerrero, Elia G. Palacios-Baes

Subject: Engineering, Chemical Engineering Keywords: silver; dissolution; thiosulfate; characterization; complex; temperature; arsenic

Online: 26 October 2016 (10:26:54 CEST)

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Preprint REVIEW | doi:10.20944/preprints201609.0050.v1

Accelerated Antibacterial Inactivation on 2D Cu-Titania Surfaces: Latest Developments and Critical Issues

Sami Rtimi, John Kiwi, Cesar Pulgarin

Subject: Engineering, Chemical Engineering Keywords: DCMS, DCMSP, and sputtering; highly ionized pulse plasma magnetron sputtering (HIPIMS); bacterial inactivation kinetics; Cu and TiO2 synergic effects; interfacial charge transfer

Online: 16 September 2016 (13:31:00 CEST)

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Preprint REVIEW | doi:10.20944/preprints201811.0399.v1

A Review of Photocatalytic Water Purification with Metal Organic Frameworks

Jorge Bedia, Virginia Muelas-Ramos, Manuel Peñas-Garzón, Almudena Gómez-Avilés, Juan J. Rodríguez, Carolina Belver

Subject: Engineering, Chemical Engineering Keywords: Metal organic frameworks; Photocatalysis; Water purification

Online: 16 November 2018 (10:44:33 CET)

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Preprint REVIEW | doi:10.20944/preprints201706.0046.v1

A Critical Review on Predicting Fouling in RO Desalination

Alejandro Ruiz-García, Noemi Melián-Martel, Ignacio Nuez

Subject: Engineering, Chemical Engineering Keywords: Reverse osmosis; Membrane fouling; Fouling indices; Predicting models

Online: 9 June 2017 (11:04:40 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201809.0070.v1

Plasma Based Water Purifier: Design And Testing of Prototype with Different Samples of Water

Suraj M, Anuradha T

Subject: Engineering, Chemical Engineering Keywords: Plasma generation, non-thermal Plasma, pulsating DC power, Ozone, cost-improvement

Online: 4 September 2018 (14:56:31 CEST)

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Preprint REVIEW | doi:10.20944/preprints201701.0006.v1

Ex-Situ vs. In-Situ Defluoridation of the Contaminated Aquifers: A State-of-the-Art Review

Meenakshi Arora, Nibha Gupta

Subject: Engineering, Chemical Engineering Keywords: Fluoride, groundwater, in-situ remediation, pump and treat

Online: 2 January 2017 (13:57:12 CET)

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Preprint ARTICLE | doi:10.20944/preprints201705.0011.v1

Olive Biophenol Integral Extraction at a Two-Phase Olive Mill

Riccardo Delisi, Rosaria Ciriminna, Stefano Arvati, Francesco Meneguzzo, Mario Pagliaro

Subject: Engineering, Chemical Engineering Keywords: biophenols; olive oil; polyphenols; hydroxytyrosol

Online: 1 May 2017 (10:09:39 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201707.0087.v1

Domain's Sweep, a Computational Method to Optimise Chemical and Physical Processes

Alexandre César Balbino Barbosa Filho

Subject: Engineering, Chemical Engineering Keywords: computational methods; optimisation; plant optimisation; chemical processes; physical processes; computational intelligence; maximum value; minimum value; functions

Online: 28 July 2017 (17:22:37 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201612.0093.v1

The Effect of Membrane Material and Surface Pore Size on the Fouling Properties of Submerged Membranes

Sungil Jeon, Saeid Rajabzadeh, Ryo Okamura, Toru Ishigami, Susumu Hasegawa, Noriaki Kato, Hideto Matsuyama

Subject: Engineering, Chemical Engineering Keywords: membrane bioreactor (MBR); membrane fouling; hollow fiber membrane; hydrophilicity; hydrophobicity; wastewater treatment

Online: 18 December 2016 (10:04:27 CET)

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Preprint ARTICLE | doi:10.20944/preprints201808.0250.v1

A Full-Scale Comparative Study of Conventional and Side-Stream Enhanced Biological Phosphorus Removal Processes

Dongqi Wang, Nicholas B. Tooker, Varun Srinivasan, Guangyu Li, Peter Schauer, Adrienne Menniti, Chris Maher, Charles B. Bott, Paul Dombrowski, James L. Barnard, Annalisa Onnis-Hayden, April Z. Gu

Subject: Engineering, Chemical Engineering Keywords: EBPR; side-stream; performance comparison; microbial ecology; activity

Online: 14 August 2018 (06:24:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201707.0089.v1

Data Assimilation in the Air Contaminant Dispersion Using Particle Filter and Expectation-Maximization Algorithm with UAV Observations

Rongxiao Wang, Bin Chen, Sihang Qiu, Zhengqiu Zhu, Xiaogang Qiu

Subject: Engineering, Chemical Engineering Keywords: air contaminant dispersion; data assimilation; particle filter; expectation-maximization algorithm; UAV

Online: 31 July 2017 (11:02:27 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201909.0054.v1

Freshwater Supply to Metropolitan Shanghai: Issues of Quality from Source to Consumers

Maotian Li, jing Chen, Brian Finlayson, Zhongyuan Chen, Michael Webber, Jon Barnett, Mark Wang

Subject: Engineering, Chemical Engineering Keywords: Shanghai; water quality; eutrophication; conventional water treatment; secondary water pollution

Online: 5 September 2019 (07:47:59 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201710.0159.v1

Photodegradation of 1-butyl-3-methylimidazolium chloride [bmim]Cl via Synergistic Effect of Adsorption-Photodegradation of Fe-TiO₂/AC

Azhar Zawawi, Raihan Mahirah Ramli, Noorfidza Yub Harun

Subject: Engineering, Chemical Engineering Keywords: photodegradation; TiO2; ionic liquids; activated carbon; synergistic effect

Online: 24 October 2017 (11:32:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201805.0041.v1

Energy-Based Performance Analysis of a Sustainable Farming Compartment with Evaporative Cooling System

M. Sina Mousavi, Siamak Mirfendereski, Jae Sung Park, Jongwan Eun

Subject: Engineering, Chemical Engineering Keywords: ecological farming system; dynamic numerical simulation; evaporative cooling system; treated wastewater; temperature; humidity

Online: 2 May 2018 (12:56:15 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201711.0145.v1

A Novel Approach of Ultraviolet Germicidal Irradiation to Reduce Air Pollution in Indoor Environments

Chao-Yun Liu, Chao-Heng Tseng, Huang-Chin Wang, Chuan-Fa Dai, Yi-Hsuan Shih

Subject: Engineering, Chemical Engineering Keywords: ultraviolet radiation; bioaerosol; formaldehyde; total volatile organic compounds; indoor air quality

Online: 22 November 2017 (10:26:40 CET)

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Preprint ARTICLE | doi:10.20944/preprints201806.0400.v1

Preparation of SLS Polypropylene Powder by Solvent Method

Liang Fang, Yan Wang, Yang Xu

Subject: Engineering, Chemical Engineering Keywords: polypropylene powder; solvent method; selective laser sintering; 3D print

Online: 25 June 2018 (16:48:10 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201806.0128.v1

Preparation and Evaluation of a Coconut Shell-Based Activated Carbon for CO₂/CH₄ Separation

Amna Abdeljaoued, Nausika Querejeta Montes, Inés Durán, Noelia Álvarez-Gutiérrez, Covadonga Pevida García, Mohamed Hachemi Chahbani

Subject: Engineering, Chemical Engineering Keywords: biogas purification; coconut shells; biomass valorization; textural characterization; adsorption isotherms; breakthrough curves.

Online: 7 June 2018 (16:27:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201803.0181.v1

Effect of Grain Size and Nutrient Feeding on the Treatment Potential of Biofilters for Treatment of De-Icing Chemicals

Gema Sakti Raspati, Hanna Kristine Haug Lindseth, Tone Merete Muthanna, Kamal Azrague

Subject: Engineering, Chemical Engineering Keywords: stormwater; biofilter; de-icing chemicals; nutrients; filtration performance

Online: 20 March 2018 (16:28:04 CET)

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Preprint ARTICLE | doi:10.20944/preprints201905.0089.v1

Synthetic Packed-Bed Generation for CFD Simulations: Blender vs. STAR-CCM+

Steffen Flaischlen, Gregor D. Wehinger

Subject: Engineering, Chemical Engineering Keywords: fixed-bed reactor; blender; Discrete Element Method; CFD

Online: 8 May 2019 (10:00:00 CEST)

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Preprint REVIEW | doi:10.20944/preprints202101.0033.v1

Commercial Thermal Technologies for Desalination of Water from Renewable Energies: A State of the Art Review

Jhon Feria-Díaz, María Cristina López-Méndez, Luis Sandoval-Herazo, Felipe Correa-Mahecha, Juan Rodríguez-Miranda

Subject: Engineering, Chemical Engineering Keywords: Desalination; Multi Effect Distillation; Multi Stage Flash; Vapor Compression Distillation; Renewable Energies.

Online: 4 January 2021 (12:33:03 CET)

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Preprint COMMUNICATION | doi:10.20944/preprints201806.0053.v1

Petroleum Sludge as Raw Material for Cement Clinker Production

Ali Benlamoudi, Aeslina Abdul Kadir, Mohamed Khodja

Subject: Engineering, Chemical Engineering Keywords: petroleum sludge; cement clinker; free lime content; burnability

Online: 5 June 2018 (08:32:29 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201906.0233.v1

Photocatalytic Degradation of Azo Dye Reactive Violet 5 on Fe-Doped Titania Catalysts under Visible Light Irradiation

Antonio Zuorro, Roberto Lavecchia, Marika Michela Monaco, Giuseppina Iervolino, Vincenzo Vaiano

Subject: Engineering, Chemical Engineering Keywords: photocatalysis; visible light; titania catalysts; azo dye; reactive violet 5; textile wastewater

Online: 24 June 2019 (08:47:16 CEST)

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Working Paper ARTICLE

Tuning of the Silicon Nitride Refractive Index by RF Sputtering Power

Daniela De Luca, Emiliano Di Gennaro, Davide De Maio, Carmine D'Alessandro, Antonio Caldarelli, Marilena Musto, Can Koral, Antonello Andreone, Valentina Di Meo, Mario Iodice, Roberto Russo

Subject: Engineering, Chemical Engineering Keywords: Silicon nitride; RF sputtering; refractive index; FTIR; AFM; SEM

Online: 7 July 2021 (12:05:33 CEST)

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Preprint CASE REPORT | doi:10.20944/preprints201806.0465.v1

Design and Implementation of a Sustainable Development Process Between Fitorremediation and Production of Bioethanol with E. crassipes

Uriel Fernando Carreño Sayago

Subject: Engineering, Chemical Engineering Keywords: E. crassipes; biomass; phytoremediation; bioethanol

Online: 28 June 2018 (11:12:33 CEST)

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Preprint CONCEPT PAPER | doi:10.20944/preprints202007.0590.v1

Kinetic Reactions Modeling and Optimization of Claus Process

Muhammad Arslan Zahid, Faisal Ali, Muhammad Mubashir, Faheem Iqbal

Subject: Engineering, Chemical Engineering Keywords: Sulfur Recovery Process; Enhance of Sulfur Production; Reduction of ammonia gas

Online: 24 July 2020 (14:00:51 CEST)

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Preprint REVIEW | doi:10.20944/preprints201806.0170.v1

Annotated Bibliography of the Global Literature on Secondary Transportation of Raw and Comminuted Forest Products (2000 – 2015)

Anil Koirala, Anil Raj Kizha, Cornelis F. De Hoop, Brian Edward Roth, Han-Sup Han, Patrick Heisl, Dalia Abbas, Shuva Gautam, Srijana Baral, Steve Bick, Kamalakanta Sahoo

Subject: Engineering, Chemical Engineering Keywords: forest biomass; timber harvest residue; supply chain; trucking; delivery; logging residue

Online: 12 June 2018 (07:53:15 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201804.0316.v1

Nutrient Control to Prevent the Occurrence of Cyanobacterial Blooms in a Eutrophic Lake in Southern Sweden, Used for Drinking Water Supply

Jing Li, Lars-Anders Hansson, Kenneth M. Persson

Subject: Engineering, Chemical Engineering Keywords: phosphorus; N:P ratio; cyanobacteria; Planktothrix agardhii; Lake Vombsjön

Online: 24 April 2018 (10:12:39 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202103.0499.v1

Investigating the Photoelectrochemical Performance of WO₃-TiO₂ Nanorod Photoanodes in Water Splitting

Armin Hariri, Neda Gilani, Javad Vahabzadeh Pasikhani

Subject: Engineering, Chemical Engineering Keywords: TiO2 nanorods; Tungsten trioxide; Photoelectrochemical; Water splitting

Online: 19 March 2021 (11:50:04 CET)

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Preprint ARTICLE | doi:10.20944/preprints202304.0309.v1

Production of Biochar from Biomass Pyrolysis for Removal of PFAS from Wastewater and Biosolids: A Critical Review

Mohamed Aboughaly, I.M.R. Fattah

Subject: Engineering, Chemical Engineering Keywords: Biochar; PFAS; Biomass pyrolysis; Fluidized bed reactors; Wastewater; Biosolids

Online: 13 April 2023 (08:11:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201808.0287.v1

High Pressure Photoreduction of CO₂: Effect of Catalyst Formulation, Hole Scavenger Addition and Operating Conditions

Elnaz Bahadori, Antonio Tripodi, Alberto Villa, Carlo Pirola, Laura Prati, Gianguido Ramis, Ilenia Rossetti

Subject: Engineering, Chemical Engineering Keywords: CO2 reduction; Photoreduction; Titania; Photocatalysis; High pressure photocatalysis

Online: 16 August 2018 (14:04:33 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201810.0007.v1

Benzotriazole Uptake and Removal in Vegetated Biofilter Mesocosms Planted with Carex Praegracilis

James Pritchard, Yeo-Myoung Cho, Negin Ashoori, Richard Luthy

Subject: Engineering, Chemical Engineering Keywords: benzotriazole; biofilter; bioretention; green infrastructure; phytoremediation; sorption; stormwater

Online: 1 October 2018 (11:55:42 CEST)

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Preprint DATA DESCRIPTOR | doi:10.20944/preprints201805.0428.v2

Taguchi Orthogonal Array Dataset for the Effect of Water Chemistry on Aggregation of ZnO Nanoparticles

Rizwan Khan, Muhammad Ali Inam, Du Ri Park, Saba Zam Zam, Ick Tae Yeom

Subject: Engineering, Chemical Engineering Keywords: aggregation; Fourier transform infrared spectrometer; particle electrophoresis; risk assessment; Taguchi orthogonal array; UV-Vis spectrophotometer; zinc oxide nanoparticles

Online: 19 June 2018 (16:03:32 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201805.0229.v1

Vertical Distribution of Total Mercury and Mercury Methylation in a Landfill Site in Japan

Jing Yang, Masaki Takaoka, Akira Sano, Akito Matsuyama, Ryuji Yanase

Subject: Engineering, Chemical Engineering Keywords: mercury; landfill; core sampling; hgcA; merA; merB

Online: 16 May 2018 (10:05:58 CEST)

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Mercury is a neurotoxin, with certain organic forms of the element being particularly harmful to humans. The Minamata Convention was adopted to reduce the intentional use and emission of mercury. Because mercury is an element, it cannot be decomposed. Mercury-containing products and mercury used for various processes will eventually enter the waste stream, and landfill sites will become a mercury sink. While landfill sites can be a source of mercury pollution, the behavior of mercury in solid waste within a landfill site is still not fully understood. The purpose of this study was to determine the depth profile of mercury, the levels of methyl mercury (MeHg), and the factors controlling methylation in an old landfill site that received waste for over 30 years. Three sampling cores were selected, and boring sampling was conducted to a maximum depth of 18 m, which reached the bottom layer of the landfill. Total mercury (THg) and MeHg were measured in the samples to determine the characteristics of mercury at different depths. Bacterial species were identified by 16S rRNA amplification and sequencing, because the methylation process is promoted by a series of genes. It was found that the THg concentration was 19–975 ng/g, with a geometric mean of 298 ng/g, which was slightly less than the 400 ng/g concentration recorded 30 years previously. In some samples, MeHg accounted for up to 15–20% of THg, which is far greater than the general level in soils and sediments, although the source of MeHg was unclear. The genetic data indicated that hgcA was present mostly in the upper and lower layers of the three cores, merA was almost as much as hgcA, while the level of merB was hundreds of times less than those of the other two genes. A significant correlation was found between THg and MeHg as well as between MeHg and MeHg/THg. In addition a negative correlation was found between THg and merA. The coexistence of the three genes indicated that both methylation and demethylation processes could occur, but the lack of merB was a barrier for demethylation.

Preprint ARTICLE | doi:10.20944/preprints201909.0039.v1

Comparison of Water Resource Policies between Brazil and Italy

Antonio Pasqualetto, Diego Lo Presti, Massimo Rovai, Aldo Muro Jr

Subject: Engineering, Chemical Engineering Keywords: water management; planning; water resources; water sustainability policies; water laws

Online: 4 September 2019 (03:37:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201808.0541.v1

Anaerobic Digester Variation on Wastewater Treatment

Elida Novita, Hendra Andiananta Pradana, Sri Wahyuningsih, Bambang Marhaenanto, Moh. Wawan Sujarwo

Subject: Engineering, Chemical Engineering Keywords: anaerobic process; biogas; coffee wastewater; digester construction

Online: 31 August 2018 (05:47:42 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201809.0605.v1

Adsorption of Carbon Dioxide into Amine Functionalized Ordered Mesoporous Materials

Marcela N. Barbosa, Maria J. F. Costa, Maricele N. Barbosa, Valter J. Fernandes Jr., Giancarlo R. Salazar-Banda, Ana C. F. Coriolano, Álvaro Reyes-Carmona, Enrique Rodríguez-Castellón, Antonio S. Araujo

Subject: Engineering, Chemical Engineering Keywords: adsorption; 3-Aminopropyltriethoxysilane; carbon dioxide; functionalization; mesoporous silica; MCM-41; SBA-15

Online: 30 September 2018 (09:21:52 CEST)

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Preprint TECHNICAL NOTE | doi:10.20944/preprints201808.0446.v1

Bio-Delipidation of Dissolved Air Flotation Pre-Treated Poultry Slaughterhouse Wastewater

Siyasanga Mbulawa, Seteno Karabo Obed Ntwampe, Moses Basitere, Yolanda Mpentshu, Cynthia Dlangamandla, Boredi Silas Chidi

Subject: Engineering, Chemical Engineering Keywords: bio-delipidation; dissolved air flotation (DAF); fats, oil and grease (FOG); poultry slaughterhouse wastewater (PSW)

Online: 27 August 2018 (09:48:51 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202108.0393.v1

Increasing Rejection in Microfiltration Using Vibrating Membrane

Asmat Ullah, Kalam Alam, Saad Ullah Khan, Victor M. Starov

Subject: Engineering, Chemical Engineering Keywords: Membrane oscillation; shear rate; slotted structure membrane; oil water separation and membrane fouling

Online: 19 August 2021 (06:51:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201810.0730.v1

Application of Biochar to the Remediation of Pb-Contaminated Solutions

Maria Rosaria Boni, Agostina Chiavola, Simone Marzeddu

Subject: Engineering, Chemical Engineering Keywords: Adsorption; Batch; Biochar; Column; Lead; Remediation

Online: 30 October 2018 (20:35:07 CET)

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Preprint REVIEW | doi:10.20944/preprints202306.1368.v1

Cobalt Metal: Overview of Deposits, Reserves, Processing, and Recycling

Nallely G Picazo-Rodriguez, Norman Toro, ,Marleth Roxana Garza Román, Diego Alejandro Tamayo Soriano, Felipe M. Galleguillos Madrid, Ingrid Jamett, Edelmira Gálvez, José Guadalupe Moreno Cedillos

Subject: Engineering, Chemical Engineering Keywords: cobalt; critical elements; beneficiation

Online: 19 June 2023 (14:18:44 CEST)

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Cobalt, like other critical elements, is gaining in importance today. The great technological advances and the deep knowledge of the physical and chemical properties of this element have allowed to enhance its applications in various fields, such as: catalysts, paints, alloys for the mechanical and aerospace industries, as well as the medical sector and in recent times, its use within the rechargeable battery industry. The main exploitable deposits are in the Democratic Republic of the Congo, which have economic potential due to a strong influence on their mineralization processes. However, the growing demand for cobalt and the search for less dependence on African deposits leads to targeting other regions, so it is necessary to carry out exhaustive exploration to find out the potential of its reserves for a subsequent benefit of the mineral. Generally, cobalt comes as a by-product of the extraction of other metallic minerals, mainly from Cu-Co, Ni-Co, Ni-Cu-Co deposits. From the above, a first review is carried out on the differences that exist in the geochemical, mineralogical and forecast properties that exist within the different deposits that harbor cobalt. As a second review topic, it delves into efficient processing for cobalt recovery, which is generally carried out by flotation, acid leaching, in addition to its recovery from secondary sources, such as batteries and metallurgical waste. However, generally speaking there is still a vast lack of fundamental knowledge about the processability of cobalt. Said processing has been affected from the point of view of mineralogy, that is, understanding and knowing the cobalt-bearing minerals, as well as gangue mineralogy, these aspects exercise significant control during their processing and selection of the most appropriate route. suitable for cobalt extraction (leaching and/or flotation). In this context, the document concludes with a vision of the challenges that the mining industry must implement to enter circular economy models, mainly in the creation of sustainable processes from secondary sources.

Preprint ARTICLE | doi:10.20944/preprints201807.0460.v1

Removal Characteristics of N-Nitrosamines and Their Precursorsby Pilot-Scale Integrated Membrane Systems for Water Reuse

Haruka Takeuchi, Naoyuki Yamashita, Norihide Nakada, Hiroaki Tanaka

Subject: Engineering, Chemical Engineering Keywords: N-nitrosamines; formation potential; membrane treatment; reverse osmosis; membrane fouling; pilot-scale

Online: 24 July 2018 (15:46:34 CEST)

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Preprint DATA DESCRIPTOR | doi:10.20944/preprints201805.0428.v1

Taguchi Orthogonal Array Dataset for the Effect of Water Chemistry on Aggregation of ZnO Nanoparticles

Rizwan Khan, Muhammad Ali Inam, Du Ri Park, Saba Zam Zam, Ick Tae Yeom

Subject: Engineering, Chemical Engineering Keywords: aggregation; Fourier transform infrared spectrometer; particle electrophoresis; risk assessment; Taguchi orthogonal array; UV-Vis spectrophotometer; zinc oxide nanoparticles

Online: 29 May 2018 (16:43:41 CEST)

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Working Paper ARTICLE

Pyrometallurgical Removal of Arsenic from Dusts Collected in Electrostatic Precipitators of Copper, Part I-Dust from a Flash Smelting Furnace

Hector Henao, Ignacio Paredes, Rodrigo Diaz, Javier Ortiz

Subject: Engineering, Chemical Engineering Keywords: copper smelter dust; electrostatic precipitators of copper; removal of arsenic; sulphidation; roasting process

Online: 18 August 2020 (07:39:38 CEST)

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This paper (the first of a series of two) seeks to describe the experimental results of removing arsenic from dust collected in electrostatic precipitators of copper into the pyro-metallurgy gas cleaning systems. The first work corresponds to the treatment of dust contained in gas off generated in the copper Flash Smelting Furnace process (FS dust), while the second focuses on the treatment of dust generated from a Fluidized Bed Roasting Furnace (RP dust). The dust is complex sulphur-oxide-metals with concentrations of copper above 10 wt % and relatively high concentrations of silver. Due to the dust has an arsenic’s concentration above 5 wt %, makes it difficult to recover valuable metals through hydro-metallurgical processes or by direct recirculation of the dust into a smelting furnace. Thus, the development of pyrometallurgical processes aimed to reduce the concentration of arsenic in dust is the main purpose of this study, particularly the production of a material suitable for recirculation in smelting operations. The works conducted provide a detailed characterization of the dust, including Quantitative Evaluation of Minerals by Scanning Electron Microscopy (QEMSCAN), Scanning electron microscope-Energy Dispersive X-ray analysis (SEM/EDS), X-ray diffraction (XR-D), elemental chemical analysis using Atomic Adsorption (A. A.) and X-Ray Fluorescence (X-RF). By considering that arsenic volatilization requires a process of reduction-sulphidation-volatilization, the works explore the roasting of mixtures of copper concentrate/dust, sulphur/dust and pyrrhotite/dust. The degree of volatilization was determined by elemental chemical analysis of arsenic in the mixture after and before the roasting process. The results indicated the effect of parameters such as temperature, gas flow, gas composition and the ratio of mixtures (concentrate, sulphur or pyrrhotite)/dust on the volatilization of arsenic. The findings indicate that the concentration of arsenic in the FS dust can be reduced to a relatively low level (<0.5 wt %), allowing to the material to be recirculated into smelting processes.

Preprint REVIEW | doi:10.20944/preprints202309.0709.v1

Polycaprolactone Composites/Blends and Their Applications Especially in Water Treatment

Gizem Özge Kayan, Asgar Kayan

Subject: Engineering, Chemical Engineering Keywords: polycaprolactone; blend; composite; adsorbent; degradation; wastewater

Online: 12 September 2023 (11:30:57 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201905.0155.v1

Production of Hydroxyl Radical and Removal of Formaldehyde by Calcined Green Tuff Powder and Tile

Toyohisa Fujita, Lanyin Zhang, Gjergj Dodbiba, Ji-Whan Anh, Yuezhou Wei, Hiromi Kurokawa, Hirofumi Matsui, Shigeki Yamamoto, Hiroshi Kawaguchi

Subject: Engineering, Chemical Engineering Keywords: Green Tuff; Towada stone; calcination; recycle; tile; hydrogen peroxide; radical; ESR; adsorption; formaldehyde, UV; photocatalysis

Online: 13 May 2019 (10:26:06 CEST)

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Preprint REVIEW | doi:10.20944/preprints202205.0009.v1

Synergistic Effect of Biomass and Industrial Waste Reuse in Bio-Composite Construction Materials for Decreasing of Natural Resources Use and Mitigation the Environmental Impact of the Construction Industry. A Review.

Iwona Ryłko-Polak, Wojciech Komala, Andrzej Białowiec

Subject: Engineering, Chemical Engineering Keywords: mineral waste; bio-base waste; natural fiber; biomass; sulfur waste; copper flotation; fly ash; biochar; sustainable construction

Online: 4 May 2022 (13:12:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201809.0244.v1

A Single Tube Contactor for Testing Membrane Ozonation

Garyfalia A. Zoumpouli, Robert Baker, Caitlin M. Taylor, Matthew J. Chippendale, Chloë Smithers, Sean H.S. Xian, Davide Mattia, Y. M. John Chew, Jannis Wenk

Subject: Engineering, Chemical Engineering Keywords: ozonation; membranes; polydimethylsiloxane; mass transfer; wastewater treatment; peroxone

Online: 13 September 2018 (15:16:43 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201807.0630.v1

Cationic High Molecular Weight Lignin Polymer: A Flocculant for the Removal of Anionic Azo-Dyes from Simulated Wastewater

Shoujuan Wang, Fangong Kong, Pedram Fatehi, Qingxi Hou

Subject: Engineering, Chemical Engineering Keywords: lignin-METAC; Lignin modification; Azo dye; Flocculation; COD.

Online: 31 July 2018 (22:27:33 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201904.0154.v1

Structural Change Analysis of Cerianite in Weathered Residual Rare Earth Ore by Mechanochemical Reduction Using X-ray Absorption Fine Structure

Tatsuya Kato, Yuki Tsunazawa, Wenying Liu, Chiharu Tokoro

Subject: Engineering, Chemical Engineering Keywords: oxygen vacancy; extended x-ray absorption fine structure; high-intensity grinding; local structure; quantum effect

Online: 13 April 2019 (05:18:11 CEST)

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Working Paper ARTICLE

Detection and Treatment Methods for Perfluorinated Compounds in Wastewater Treatment Plants

Shun-hwa Lee, Yeon-jung Cho, Byung-dae Lee

Subject: Engineering, Chemical Engineering Keywords: perfluorinated compounds; coagulation; ozone; chlorination; activated carbon

Online: 9 May 2019 (13:00:57 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201808.0008.v1

Metal Removal from Acid Waters by an Endemic Microalga from the Atacama Desert for Water Recovery

Marcela Martínez, Yanett Leyton, Luis A. Cisternas, Carlos Riquelme

Subject: Engineering, Chemical Engineering Keywords: Muriellopsis sp.; bioremediation; metallic ions; acid waters; removal

Online: 1 August 2018 (08:37:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201810.0479.v2

Purification Treatment on Polluted River via Combinations of Gravel Contact Oxidation Treatment and Surface Flow Constructed Wetlands—A Case Study in Changhua County, Taiwan

Chen-Chiang Chou, Wei-Ting Chen, Yung-Pin Tsai

Subject: Engineering, Chemical Engineering Keywords: ecology technology; gravel contact oxidation; surface flow constructed wetlands; water quality; river pollution index

Online: 2 December 2018 (09:33:29 CET)

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Preprint ARTICLE | doi:10.20944/preprints201811.0413.v1

A Green Process for the Extraction and Purification of Hesperidin from Mexican Lime Peel (Citrus aurantifolia Swingle) Extendible to Citrus Genus

José Daniel Padilla de la Rosa, Priscilla Ruiz-Palomino, Guadalupe M. Guatemala-Morales, Jorge A. García-Fajardo, Georgina C. Sandoval-Fabián, Enrique Arriola-Guevara

Subject: Engineering, Chemical Engineering Keywords: Citrus aurantifolia Swingle; hesperidin; citrus byproducts; adsorption

Online: 19 November 2018 (04:14:44 CET)

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Preprint ARTICLE | doi:10.20944/preprints202109.0173.v1

Diffusion Analysis With High and Low Concentration Regions by Finite Difference Method, Adaptive Network-Based Fuzzy Inference System, and Bilayered Neural Network Method

Qike Shao, Sina Faizollahzadeh Ardabili, Majdi Mafarja, Hamza Turabieh, Qian Zhang, Shahab S. Band, Kwok-Wing Chau, Amir Mosavi

Subject: Engineering, Chemical Engineering Keywords: ANFIS; Bilayered neural network; diffusion phenomena; diffusion of molecules; machine learning

Online: 9 September 2021 (10:50:57 CEST)

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Working Paper ARTICLE

Membrane Theory Prediction Is Fully Against Experimental Facts

Hirohisa Tamagawa, Bernard Delalande

Subject: Engineering, Chemical Engineering Keywords: membrane theory; Association-Induction Hypothesis; ion transport, ion adsorption; membrane potential

Online: 13 August 2021 (08:53:04 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201809.0574.v1

^{Hydrodynamic Study and Influence of Physicochemical Parameters on Gas Retention in a Submerged Membrane Bioreactor}

Nsoe Mengue Jean Jacques Nestor, Kofa Guillaume, Marc Heran, Kayem Joseph, Ndi Koungou Sylvere

Subject: Engineering, Chemical Engineering Keywords: hydrodynamic; gas retention; submerged membrane bioreactor; influence of temperature; oxygen mass transfer coefficient

Online: 29 September 2018 (03:53:05 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202108.0255.v1

Feasibility of Remediation Lead, Nickel, Zinc, Copper and Cadmium Contaminated Groundwater by Calcium Sulfide

Chin-Yuan Huang, Pei-Cheng Cheng, Jih-Hsing Chang, Yu-Chih Wan, Xiang-Min Hong, Shu-Fen Cheng

Subject: Engineering, Chemical Engineering Keywords: heavy metal; polysulfide; groundwater; stabilization; lead

Online: 11 August 2021 (11:18:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201810.0551.v1

Mass Transfer Coefficient in Multi-Stage Reformer/Membrane Modules for Hydrogen Production

Diego Barba, Mauro Capocelli, Marcello De Falco, Giovanni Franchi, Vincenzo Piemonte

Subject: Engineering, Chemical Engineering Keywords: RMM; membrane modules; modelling; material exchanger; permeation experiments

Online: 24 October 2018 (05:57:34 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0361.v1

Effect of C/N Ratio on Biodegradation of Ciprofloxacin and Denitrification from Low C/N Wastewater by a Novel 3D-BER System

Mahdi Hassan, Guangcan Zhu, Zhonglian Yang, Yongze Lu, Yan Lang, Liying Gong, Huang Shan

Subject: Engineering, Chemical Engineering Keywords: Biodegradation of Ciprofloxacin; 3D-BER System; Denitrification; Microbial communities; Low C/N Wastewater treatment.

Online: 17 August 2020 (10:26:08 CEST)

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Preprint COMMUNICATION | doi:10.20944/preprints202206.0062.v1

The Development of Anammox and Chloroflexi Bacteria during Composting of Sewage Sludge

Sylwia Stegenta-Dąbrowska, Karolina Sobieraj, Joanna Rosik, Robert Sidełko, Marvin Valentine, Andrzej Białowiec

Subject: Engineering, Chemical Engineering Keywords: anammox bacteria; composting; sewage sludge; low C/N ratio; nitrogen balance; ammonia emissions

Online: 6 June 2022 (05:27:20 CEST)

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Preprint REVIEW | doi:10.20944/preprints201810.0463.v1

Recycling Prospects for Saponite-Containing Water at Diamond Processing Plants in Arkhangelsk Region, Russia

Valentine A. Chanturiya, Vladimir G. Minenko, Dmitriy V. Makarov, Olga V. Suvorova, Ekaterina A. Selivanova

Subject: Engineering, Chemical Engineering Keywords: saponite-containing waters; diamond processing plants; cryogenic treatment; electrochemical separation; saponite product applications

Online: 22 October 2018 (04:34:23 CEST)

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Preprint REVIEW | doi:10.20944/preprints202106.0608.v1

Unified Theory for Hybrid-Photocatalysts: A Review on New Strategies for Synergic, Enhanced Conversion Efficacy and Photoredox Cycle

Jui-Teng Lin

Subject: Engineering, Chemical Engineering Keywords: polymerization kinetics; conversion efficacy; free radical and cationic radical; photoredox catalyst; 3D bioprinting.

Online: 25 June 2021 (07:38:09 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202002.0008.v1

Optimal Conditions of Membrane Filtration Process in the Treatment of Blending Water by Lab-Scale and Pilot-Scale Tests

Sung-joon Kim

Subject: Engineering, Chemical Engineering Keywords: ceramic membrane; combination process; microfiltration; optimization; recovery efficiency

Online: 3 February 2020 (03:58:04 CET)

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Preprint REVIEW | doi:10.20944/preprints202307.1238.v1

Thorium Between Removing, Recovery and Recycling: A Membrane Challenge for Urban Mining

Geani Teodor Man, Paul Constantin Albu, Aurelia Cristina Nechifor, Alexandra Raluca Grosu, Szidonia-Katalin Tanczos, Vlad-Alexandru Grosu, Mihail-Răzvan Ioan, Gheorghe Nechifor

Subject: Engineering, Chemical Engineering Keywords: thorium removing; thorium recovery, thorium recycling; thorium separation, thorium transport; thorium separation; thorium membrane separation; thorium membrane concentration; thorium determination

Online: 18 July 2023 (13:36:38 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201811.0318.v1

Species and Bio-Availability of Inorganic and Organic Phosphorus in Primary, Secondary and Digested Sludge

Shaoxiang Zhang, Wenli Huang, Dongfang Liu

Subject: Engineering, Chemical Engineering Keywords: Sewage sludge, P bio-availability, P species, SMT protocol

Online: 13 November 2018 (15:07:58 CET)

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Preprint ARTICLE | doi:10.20944/preprints202007.0162.v1

Diversity of Immobilized Bacterial Communities and Nitrates Removal by Instantaneous Heterotrophic Denitrification Treating Nitrate-Polluted Water Using 3D-BERs-GAC: Effects of pH and COD/NO3- -N Ratio

Mahdi Hassan, Guangcan Zhu, Zhonglian Yang, Yongze Lu, Huang Shan

Subject: Engineering, Chemical Engineering Keywords: Heterotrophic denitrification; Granular activated carbon (GAC); Bacterial Community; 3D-BER system

Online: 9 July 2020 (01:51:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201810.0476.v1

Phase Evolution and Textural Changes during the Direct Conversion and Storage of CO₂ to Produce Calcium Carbonate from Calcium Hydroxide

Meishen Liu, Greeshma Gadikota

Subject: Engineering, Chemical Engineering Keywords: ultra-small angle X-ray scattering (USAXS); small angle X-ray scattering (SAXS); wide angle X-ray scattering (WAXS); calcium hydroxide; calcium carbonate; carbon capture; utilization; and storage; carbon mineralization

Online: 22 October 2018 (06:24:59 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202307.1509.v1

Optimization of Carbon Capture & Hydrogen Production via Steam Reforming: A Simulation-Based Case Study

Ahmed Nazmus Sakib, Ahnaf Tahmid Shabab, Md. Firoz Ahmed

Subject: Engineering, Chemical Engineering Keywords: Aspen HYSYS; SMR; pinch analysis; PCC; hydrogen; carbon capture; MEA-MDEA

Online: 21 July 2023 (10:59:29 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202010.0054.v1

Rheological and Component Characterization of an Innovative Bio-Binder Using Guayule Resin in Partial and Entire Asphalt Replacement

Ahmed Hemida, Magdy Abdelrahman

Subject: Engineering, Chemical Engineering Keywords: Asphalt Rheology, Asphalt Rubber, Component Analysis, Crumb Rubber Modifier, FTIR, Guayule Resin, Infrared Spectra, Superpave

Online: 5 October 2020 (08:15:30 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202112.0020.v1

New Insights Into Recovery of Copper and Gold from Old Flotation Tailings from Bor, Serbia

Erdem Özdemir, Aleksandra Lang, Juha Saari, Jussi Liipo

Subject: Engineering, Chemical Engineering Keywords: copper; gold; mineralogy; tailings; flotation; value recovery; modelling

Online: 1 December 2021 (16:27:57 CET)

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Preprint ARTICLE | doi:10.20944/preprints201811.0085.v1

Determination of the Theoretical Spectrum of Gamma Emission Generated by DGNAA in Samples of Ashes of Thermal Power Plants

German Marcos-Robredo, M. Pilar Castro-García, Miguel Ángel Rey-Ronco, Teresa Alonso-Sánchez

Subject: Engineering, Chemical Engineering Keywords: ash; power plant; neutron activation analysis; neutron; DGNAA

Online: 5 November 2018 (05:28:33 CET)

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Working Paper REVIEW

The Role of Microorganisms in the Formation, Dissolution and Transformation of Secondary Minerals in Mine Rock and Drainage: A Review

Jose Eric Ortiz-Castillo, Mohamad Mirazimi, Maryam Mohammadi, Eben Dy, Wenying Liu

Subject: Engineering, Chemical Engineering Keywords: mine rock drainage; sulfide oxidation; neutralization by silicates; secondary iron minerals; toxic element scavenging

Online: 15 October 2021 (12:22:41 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202009.0136.v1

Component Analysis of Bio-Asphalt Binder Using Crumb Rubber Modifier and Guayule Resin as an Innovative Asphalt Replacer

Ahmed Hemida, Magdy Abdelrahman

Subject: Engineering, Chemical Engineering Keywords: Asphalt rubber; Bio-binder; Component analysis; FTIR; Guayule resin; TGA

Online: 5 September 2020 (09:40:46 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202206.0419.v1

Local Heat Transfer Dynamics in the In-Line Tube Bundle under Asymmetrical Pulsating Flow

Aigul Haibullina, Aidar Khairullin, Denis Balzamov, Vladimir Ilyin, Veronika Bronskaya, Liliya Khairullina

Subject: Engineering, Chemical Engineering Keywords: asymmetric pulsating flow; in-line tube bundle; CFD; enhancement of heat transfer

Online: 30 June 2022 (07:47:01 CEST)

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Preprint REVIEW | doi:10.20944/preprints202309.2044.v1

A Review of Photocatalytic Water Splitting for Hydrogen Production Using Tandem Solar Cell

Nur Ain Atiqah Mohd Amin, Hayyiratul Fatimah Mohd Zaid

Subject: Engineering, Chemical Engineering Keywords: photocatalytic water splitting; photoelectrochemical cell; dye solar cell; tandem solar cell; hydrogen

Online: 29 September 2023 (08:05:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202112.0059.v1

The Influence of Low-Temperature Food Waste Biochars on Anaerobic Digestion of Food Waste

Kacper Świechowski, Andrzej Białowiec, Bartosz Matyjewicz, Paweł Telega

Subject: Engineering, Chemical Engineering Keywords: Methane fermentation; biogas; biomethane; biochar; pyrolysis; hydrothermal carbonization; biochemical methane potential; biogas production kinetics

Online: 6 December 2021 (11:16:52 CET)

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Preprint REVIEW | doi:10.20944/preprints202307.1412.v1

Hydrogen Assisted Aging to Storage & Sealing Materials: A Comprehensive Review

A.K.M. Ahsanul Habib, Ahmed Nazmus Sakib, Zarin Tasnim Mona, Md Monjur Hossain Bhuiyan, Pejman Kazempoor, Zahed Siddique

Subject: Engineering, Chemical Engineering Keywords: hydrogen; aging; polymer; storage and sealing materials; sustainability; pipeline; leak

Online: 20 July 2023 (10:11:53 CEST)

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Working Paper ARTICLE

The Utilization of Electrokinetics for the Treatment of Industrial Wastewater-Industrial Size Experimental Study

Yujie Su, Hui Hu, Mei Dong, Rafig Azzam

Subject: Engineering, Chemical Engineering Keywords: wastewater treatment; electrocoagulation; electrokinetics; industrial wastewater; industrial size experiment

Online: 25 December 2019 (09:30:22 CET)

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Preprint ARTICLE | doi:10.20944/preprints202310.1340.v1

Characterization of Equilibrium Catalysts from the Fluid Catalytic Cracking Process of Atmospheric Residue

Zakariyaou Seybou Yacouba, Hua Ye, Oumarou Abdoulaye Dan Makaou, Mamane Souley Abdoul Aziz, Shi Xian Ke

Subject: Engineering, Chemical Engineering Keywords: fluidized catalytic cracking; catalyst characterization; catalyst deactivation; coking mechanism; mass loss; catalyst kinetic; thermodynamic parameters

Online: 23 October 2023 (05:41:30 CEST)

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In the FCC conversion of heavy petroleum fractions as atmospheric residues, the main challenge for refiners to achieve the quantity and quality of various commercial products depends essentially on the catalyst used in the process. A deep characterization of the catalyst at different steps of the process (fresh, regenerated, and spent catalyst) was investigated to study the catalyst's behavior including the physicochemical evolution, the deactivation factor, and kinetic-thermodynamic parameters. All samples have been characterized by various spectroscopy methods such as N2 adsorption-desorption, UV-visible spectroscopy, Raman spectroscopy, LECO carbon analysis, Scanning electron microscopy (SEM), X-ray diffraction (XRD), X‐ray fluorescence (XRF), nuclear magnetic resonance spectroscopy (NMR13C) analysis, and Thermogravimetric analysis. The results of N2 adsorption-desorption, UV-vis, Raman, LECO carbon, and SEM images showed that the main causes of catalyst deactivation and coking were the deposition of carbon species that covered the active sites and clogged the pores, and the attrition factor due to thermal conditions and poisonous metals. The XRD and XRF results showed the catalyst’s physicochemical evolution during the process and the different interlinks between catalyst and feedstock (Nickel, Vanadium, Sulfur, and Iron) elements which should be responsible for the coking and catalyst attrition factor. It has been found that, in addition to the temperature, the residence time of the catalyst in the process also has an influence on catalyst structure transformation. NMR13C analysis revealed that polyaromatic hydrocarbon is the main component in the deposited coke of the spent catalyst. Thermogravimetric analysis showed that the order of catalyst mass loss was fresh > regenerated > spent catalyst due to the progressive losses of the hydroxyl bonds (OH) and the structure change along the catalyst thermal treatment. Moreover, the kinetic and thermodynamic parameters showed that all zones are non-spontaneous endothermic reactions.

Preprint ARTICLE | doi:10.20944/preprints202303.0260.v1

Selective Paste Intrusion: Integration of Reinforcement by WAAM — Concept and Overview of the Current Research

Alexander Straßer, Felix Riegger, Leigh Duncan Hamilton, Thomas Kränkel, Christoph Gehlen, Michael F. Zaeh, Arno Kwade

Subject: Engineering, Chemical Engineering Keywords: Additive manufacturing; Concrete; Particle bed; Reinforcement; SPI; WAAM; Rheology; Temperature; Concrete strength

Online: 14 March 2023 (13:24:27 CET)

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Preprint ARTICLE | doi:10.20944/preprints202305.1573.v1

Sunlight Degradation and Mineralization of Food Dye Photoinduced by Homogenous Photo Fenton Fe(III) and Fe(II) /Complex: Surface Response Modeling

Mohammed Kebir, Imen kahina Benramdhan, Nasrallah Noureddine, Hichem Tahraoui, Bait Nadia, Benaissa Houssine, Aomeraoui Rachid, Jie Zhang, Aymen Amin ASSADI, Lotfi Mouni, Abdeltif Amrane

Subject: Engineering, Chemical Engineering Keywords: Complex; Degradation; food dye; mineralization; Box Benhken surface design.

Online: 23 May 2023 (04:52:29 CEST)

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Preprint REVIEW | doi:10.20944/preprints202308.1487.v1

Droplets-Based Microfluidics as a Platform to Design Food-Grade Delivery Systems Based on the Entrapped Compound Type

Jhonatan Rafael de Oliveira Bianchi, Lucimara Gaziola De la Torre, Ana Leticia Rodrigues Costa

Subject: Engineering, Chemical Engineering Keywords: microchannels; droplet; hydrophilic compound; hydrophobic compound; drug delivery; emulsion

Online: 22 August 2023 (03:38:29 CEST)

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Preprint REVIEW | doi:10.20944/preprints202401.0243.v1

Harnessing Hydrogen: A Comprehensive Literature Review on Strategic Launching Initiatives in the Global Energy Market

Ahmed Nazmus Sakib, Farian Mehjabin, Jeffrey B Schmidt

Subject: Engineering, Chemical Engineering Keywords: hydrogen; global energy; supply chain; commercialization; AIDA model; Business

Online: 3 January 2024 (10:25:38 CET)

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Preprint ARTICLE | doi:10.20944/preprints202303.0331.v1

Abstract Entity Patterns for Sensors and Actuators

Bijayita Thapa, Eduardo B. Fernandez, Ionut Cardei, Maria Petrie

Subject: Engineering, Chemical Engineering Keywords: Cyber-physical system; Internet of things; Security pattern; Security solution frame

Online: 20 March 2023 (02:12:35 CET)

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Preprint ARTICLE | doi:10.20944/preprints202303.0216.v1

Aspen Plus(r) Process Simulation Model of the Biomass Ash-Based Treatment of Anaerobic Digestate for Production of Fertilizer and Upgradation of Biogas

Alejandro Moure Abelenda, Abdikhani Ali, Kirk Taylor Semple, Farid Aiouache

Subject: Engineering, Chemical Engineering Keywords: Waste valorization; stabilization; nutrient recovery; closed-loop; modelling; circular economy; ammonium carbonate; organic fertilizer; bioenergy; biogas upgrading

Online: 13 March 2023 (04:42:38 CET)

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Preprint ARTICLE | doi:10.20944/preprints202308.1709.v1

Optimization and Modeling of Teff, Sorghum and Fenugreek Flour Mixing Ratios for Better Quality Characteristics of injera by Using D-Optimal Mixture Design

Melaku Tafese Awulachew, Kumsa Delessa Kuffi

Subject: Engineering, Chemical Engineering Keywords: malnutrition; antinutrients; staling; fenugreek; sorghum; teff; injera

Online: 24 August 2023 (05:37:14 CEST)

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Deficiency, with its two constituents of protein-energy deficiency and micronutrient deficiencies, remains a substantial health burden in underdeveloped nations. It is the largest cause of sickness and death worldwide, particularly harming hundreds of millions of small children and pregnant women. In order to improve the protein-energy and micro- macro needs of developing countries, food products made from compositing flours are required. Ethiopian injera is a fermented, leavened flatbread produced primarily from teff flour. However, when compared to teff injera, injera made from sorghum flour and its blend has been found to have textural flaws. Uncontrolled staling of sorghum flour incorporated teff injera resulted in limited softness, freshness, rollability, brittleness anddryness which create big problems during storage. Due to its numerous health advantages and nutritional worth, fenugreek is regarded as a key functional food element. As a result, this study was conducted to identify the regression equation of injera formulations and optimise the teff, sorghum, and fenugreek flour blending ratios that result in injera with higher quality properties. Using mixture design methods and a D-optimal design, the effects of blending flour ratios on injera quality were examined. Teff flour alone injera was used as the control. Fourteen injera formulations were created using limited mixtures of teff (50-100%), sorghum (0-50%), and fenugreek (0-5%). Proximate, staling rate, mineral, antinutritional components, and sensory qualities were all taken into account as response variables in this study. The study's findings showed that increasing the proportion of fenugreek flours in injera made from teff-sorghum-fenugreek mixing ratios improved nutritive values, improved sensory appeal, textural characteristics and reduced staling rate. Generally speaking, the best injera blending ratio was found to be 64.1% teff, 32% sorghum, and 3.80% fenugreek in terms of overall qualitative qualities.

Preprint ARTICLE | doi:10.20944/preprints202307.1405.v1

Quantitating Wastewater Characteristic Parameters Using Neural Network Regression Modeling on Spectral Reflectance

Dhan Lord B. Fortela, Armani Travis, Ashley P. Mikolajczyk, Wayne Sharp, Emmanuel Revellame, William Holmes, Rafael Hernandez, Mark Zappi

Subject: Engineering, Chemical Engineering Keywords: neural network regression; wastewater quality; spectral reflectance

Online: 20 July 2023 (10:44:00 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202310.0798.v1

Using Python to Analyze and Model Chemical Engineering Processes: A Case Study of MSS Drying

Erik Mihelič, Dušan Klinar, Klavdija Rižnar, Primož Oprčkal

Subject: Engineering, Chemical Engineering Keywords: Python programming; MSS drying; drying parameters; drying master curve

Online: 12 October 2023 (08:57:04 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.0185.v2

Effect of Jet Nozzle Position on Mixing Time in Large Tanks

Timothy Ayodeji Oluwadero, Catherine Xuereb, Joelle Aubin, Martine Poux

Subject: Engineering, Chemical Engineering Keywords: Jet mixing; Mixing; Mixing time; Circulation time; Jet

Online: 26 July 2023 (10:06:21 CEST)

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Working Paper ARTICLE

Pyrometallurgical Removal of Arsenic from Dusts Collected in Electrostatic Precipitators of Copper Part II:-Dust from a Fluidized Bed Roasting Furnace

Hector Henao, Ignacio Paredes, Rodrigo Diaz, Javier Ortiz

Subject: Engineering, Chemical Engineering Keywords: Copper smelter dust; electrostatic precipitators of copper; removal of arsenic; sulphidisation; roasting process.

Online: 20 August 2020 (09:55:21 CEST)

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Preprint REVIEW | doi:10.20944/preprints202309.1329.v1

A Short Review on Dye Wastewater Valorization Using Up-Flow Anaerobic Sludge Blanket Reactors

Ronei de Almeida, Claudinei de Souza Guimarães

Subject: Engineering, Chemical Engineering Keywords: Biogas; Dye-containing wastewater; Resource recovery; Sludge; UASB reactors; Water reuse

Online: 20 September 2023 (03:27:04 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.2236.v1

Flash Distillation Process for Stabilization of Anaerobic Digestate and Synthesis of Ammonium Bicarbonate

Alejandro Moure Abelenda, Farid Aiouache

Subject: Engineering, Chemical Engineering Keywords: Circular economy; greenhouse gas; carbon capture; endogenous striping agents; biogas upgrading; slow-release fertilizer

Online: 31 May 2023 (11:27:31 CEST)

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With the current increase in the demand from animal and agricultural products, management of agrowaste has become critical to avoid greenhouse gas emissions. The present article investigates the applicability of ammonium bicarbonate synthesis via flash distillation to valorize and stabilize several types of anaerobic digestate produced from individual fermentations of amino acids. Prior to the development of the model in Aspen Plus v12, the description of the system aqua-ammonia-carbon dioxide provided by the electrolyte non-random two-liquid property method was validated with empirical data available in the literature. The content of CO₂ in the digestate was found to be responsible of the OH alkalinity (0.4 equivalents of acid/kg digestate), while the partial and total alkalinities (0.8 eq/kg digestate) were essentially derived from the content of NH₃. The most suitable conditions for the flash distillation were 95 ⁰C and 1 bar with the condensation occurring at 25 ⁰C. However, in order to attain the precipitation of NH₄HCO₃ in the distillate, it was necessary to consider digestates with a moisture content of 50 wt.%, since the minimum levels of inorganic nitrogen and inorganic carbon were not attained otherwise. Even under these conditions, few amino acids (i.e. arginine, glycine, and histidine) were able to provide an anaerobic digestate, upon fermentation, that would be suitable for NH₄HCO₃ stabilization. Despite alanine digestate and glutamine digestate presented sufficient concentrations of inorganic nitrogen and inorganic carbon, the NH₄HCO₃-stabilization was not feasible due to the limited volatilization of NH₃. The process of stabilization with a capacity of a tonne of digestate per hour was improved by adding hydrochloric acid or sodium hydroxide at rates 44 kg/h, leading to production of 34 kg NH₄HCO₃/h. The economic viability of this process needs to be investigated considering not only the market value of the isolated inorganic fertilizer but the carbon credits saved, resulting from handling a more stabilized organic manure. Furthermore, given the role of the volatile elements of the biogas as endogenous stripping agents, it is recommended to use a fresh and saturated digestate as feed for the flash distillation.

Preprint REVIEW | doi:10.20944/preprints202307.0225.v1

Transitioning Towards Net Zero Emissions in the Chemical and Process Industries: A Holistic Perspective

Peter Glavič, Zorka Novak Novak Pintarič, Helena Levičnik, Vesna Dragojlović, Miloš Bogataj

Subject: Engineering, Chemical Engineering Keywords: net zero; energy; process industries; emissions; climate; chemicals; biomass; waste; cement; metals

Online: 5 July 2023 (03:31:21 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202106.0670.v2

COVID-2019/2020 Pandemic Impacts on the Solid Waste Sector of Rio de Janeiro Municipality, Brazil: Analysis of Waste Production, Challenges, and Recommendations

Ronei de Almeida, Ronaldo Lúcio de Souza Teixeira

Subject: Engineering, Chemical Engineering Keywords: Household waste management; Recyclables; Healthcare waste; COVID-19

Online: 26 October 2023 (09:46:26 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.0418.v1

Experimental and Theoretical Study of Methylene Blue Adsorption on a New Raw Material, Cynarascolymus - A statistical Physics Assessment

Chaker Djama, Abdallah Bouguettoucha, Derradji Chebli, Abdeltif Amrane, Hichem Tahraoui, Jie Zhang, Lotfi Mouni

Subject: Engineering, Chemical Engineering Keywords: Adsorption; Methylene blue; Cynarascolymus; isotherm; Kinetics; Physical models

Online: 6 May 2023 (10:34:54 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202309.0304.v1

Removal of Pb2+ from Aqueous Media by Adsorption onto a Novel Coconut-Based Polyurethane-Activated Carbon Composite in a Fixed-Bed Column: Experimental Design and Breakthrough Curves Modelling

Rubie Mae D. Fernandez, Renz John R. Estrada, Tomas Ralph B. Tomon, Roger Jr. G. Dingcong, Ruben F. Amparado Jr., Rey Y. Capangpangan, Roberto M. Malaluan, Gerard G. Dumancas, Alona A. Lubguban, Arnold C. Alguno, Hernando P. Bacosa, Arnold A. Lubguban

Subject: Engineering, Chemical Engineering Keywords: polyurethane foam; activated carbon; adsorption; lead; heavy metals

Online: 6 September 2023 (03:11:09 CEST)

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Preprint REVIEW | doi:10.20944/preprints202309.1318.v1

Advances in Machine Learning for Monitoring, Control, and Optimization of Temperature of Reactors

Iftikhar Ahmad

Subject: Engineering, Chemical Engineering Keywords: reactor operations; Machine Learning (ML); optimization; Artificial Neural Networks (ANNs); Genetic Algorithms (GAs)

Online: 20 September 2023 (08:59:34 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.0283.v1

A Deep Neural Network Regression of the Cahn–Hilliard Single-Particle Thermal Model for LiFePO₄ Batteries

Roger Painter, Ranganathan Parthasarathy, Lin Li, Irucka Embry, Lonnie Sharpe, S. Keith Hargrove

Subject: Engineering, Chemical Engineering Keywords: lithium-ion batteries; LIB; LiFePO4; electric vehicles; Cahn–Hilliard; principal component analysis; neural networks

Online: 5 June 2023 (09:01:49 CEST)

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