Review
Version 1
Preserved in Portico This version is not peer-reviewed
Piggery Wastewater Treatment Using Photosynthetic Microorganisms
Version 1
: Received: 18 January 2023 / Approved: 19 January 2023 / Online: 19 January 2023 (12:20:24 CET)
A peer-reviewed article of this Preprint also exists.
Sepúlveda-Muñoz, C.A.; de Godos, I.; Muñoz, R. Wastewater Treatment Using Photosynthetic Microorganisms. Symmetry 2023, 15, 525. Sepúlveda-Muñoz, C.A.; de Godos, I.; Muñoz, R. Wastewater Treatment Using Photosynthetic Microorganisms. Symmetry 2023, 15, 525.
Abstract
Piggery wastewater (PWW) is characterized by its high concentrations of organic matter and ammonium, and by their odour nuisance. Traditionally, PWW has been treated in open anaerobic lagoons, anaerobic digesters and activated sludge systems, which exhibit high greenhouse gas emissions, a limited nutrients removal and a high energy consumption, respectively. Photosyn-thetic microorganisms can support a sustainable PWW treatment in engineered photobioreactors at low operating costs and with an efficient recovery of carbon, nitrogen and phosphorous. These microorganisms are capable of absorbing solar irradiation through the photosynthesis process to obtain energy, which is used for their growth and associated carbon and nutrients assimilation. Purple phototrophic bacteria (PPB) represent the photosynthetic microorganisms with the most versatile metabolism in nature, while microalgae are the most studied photosynthetic microor-ganisms in recent years. This review describes the fundamentals, symmetry and asymmetry of PWW treatment using photosynthetic microorganisms such as PPB and microalgae. The main photobioreactor configurations along with the potential of PPB and microalgae biomass valori-zation strategies are also discussed.
Keywords
Biomass valorization; Microalgae; Nutrient recovery; Purple phototrophic bacteria; Swine manure
Subject
Biology and Life Sciences, Immunology and Microbiology
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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