Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Exploring Solar Drying of Henna (Lawsonia inermis) and Its Effect on the Bioactivities

Leila Bennamoun
,
Scheherazed Dakhmouche Djekrif
ORCID logo ,
Said Bennaceur
ORCID logo ,
Mancef Mekki
,
Redouane Bouldjaj
,
Amel Ait-Kaki El Hadef-El Okki
ORCID logo ,
Lyes Bennamoun
* ORCID logo ,
Tahar Nouadri
Version 1 : Received: 17 January 2024 / Approved: 18 January 2024 / Online: 18 January 2024 (07:12:37 CET)

How to cite: Bennamoun, L.; Djekrif, S.D.; Bennaceur, S.; Mekki, M.; Bouldjaj, R.; Ait-Kaki El Hadef-El Okki, A.; Bennamoun, L.; Nouadri, T. Exploring Solar Drying of Henna (Lawsonia inermis) and Its Effect on the Bioactivities. Preprints 2024, 2024011374. https://doi.org/10.20944/preprints202401.1374.v1 Bennamoun, L.; Djekrif, S.D.; Bennaceur, S.; Mekki, M.; Bouldjaj, R.; Ait-Kaki El Hadef-El Okki, A.; Bennamoun, L.; Nouadri, T. Exploring Solar Drying of Henna (Lawsonia inermis) and Its Effect on the Bioactivities. Preprints 2024, 2024011374. https://doi.org/10.20944/preprints202401.1374.v1

Abstract

This study has two main focuses: the first focus is to explore the design and the behavior of a locally built solar dryer during processing henna leaves. This was performed through the determination of the most important parameters that have effect on the drying process. Appropriately, it was found that the outlet air temperature of the solar collector depends entirely on the solar radiation, Moreover, the inlet temperature of the air to the drying chamber has also an important impact on the moisture content of the product. It was found that most of the studies dealing with solar drying do not take into consideration the quality of the final product. Accordingly, the second objective of this study is to present the effect of drying process on the quality of the drier samples. For this purpose, the bioactivity of the samples, in terms of determination of the total phenol content, total flavonoid content, and antioxidant activities was performed. Three different samples: fresh sample, samples dried with the presented solar dryer and open solar dried samples are tested. It was found that samples dried with the solar dryer presented the best results.

Keywords

Open sun drying; Convective solar drying; Henna leaves; Operating conditions; Bioactivities; Final product quality

Subject

Biology and Life Sciences, Food Science and Technology

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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