Fruit peel crude enzymes for enhancement of biohydrogen production from synthetic swine wastewater by improving biohydrogen-formation processes of dark fermentation. (March 2023)

• Record Type: Journal Article
• Authors: Feng, Siran; Ngo, Huu Hao; Guo, Wenshan; Khan, Mohd Atiqueuzzaman; Zhang, Shicheng; Luo, Gang; Liu, Yi; An, Ding; Zhang, Xinbo
• Is Part Of: Bioresource technology. Volume 372(2023)
• Publication Date: 2023-03
• Subjects: Biohydrogen -- Fruit peel crude enzyme -- Synthetic swine wastewater -- Dark fermentation; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2023.128670
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Crude enzyme addition enhanced biohydrogen yield by 17.01 – 23.87%. Banana peel crude enzyme was the most effective additive. The fruit peel crude enzymes improved the biohydrogen-formation processes. Feasible function pathways of the crude enzymes were analysed. Abstract: Biohydrogen is a promising clean fuel but with a low yield. This study aims to enhance biohydrogen production from synthetic swine wastewater by employing crude enzymes obtained from different fruit peels (orange, mandarin, and banana) to improve the biohydrogen-formation processes of dark fermentation. Results indicated that dosing with crude enzymes affected volatile fatty acids (VFAs) and biogas composition insignificantly, while increased biohydrogen yield from 1.62 ± 0.00 (blank) to 1.90 ± 0.08 (orange peel), 2.01 ± 0.00 (mandarin peel), and 1.96 ± 0.01 (banana peel) mol H2 /mol glucose, respectively. Banana peel crude enzyme was the most effective additive, with 1 g/L protein improving 97.41 ± 3.72 % of biohydrogen yield. The crude enzymes wielded less influence on acetic acid and butyric acid pathways but enhanced other biohydrogen production pathways. These observations demonstrated that fruit peel-based crude enzymes as additives are advantageous to improving biohydrogen yield towards higher biohydrogen production.