Volatile fatty acids production from waste streams by anaerobic digestion: A critical review of the roles and application of enzymes

Bioresource Technology, Год журнала: 2022, Номер 359, С. 127420 - 127420

Опубликована: Июнь 9, 2022

Язык: Английский

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Microbial proteases and their applications

Frontiers in Microbiology, Год журнала: 2023, Номер 14

Опубликована: Сен. 14, 2023

Proteases (proteinases or peptidases) are a class of hydrolases that cleave peptide chains in proteins. Endopeptidases type protease hydrolyze the internal bonds proteins, forming shorter peptides; exopeptidases terminal from C-terminal N-terminal, free amino acids. Microbial proteases popular instrument many industrial applications. In this review, classification, detection, identification, and sources microbial systematically introduced, as well their applications food, detergents, waste treatment, biotechnology processes industry fields. addition, recent studies on techniques used to express heterologous summarized describe process studying proteases. Finally, future developmental trends for discussed.

Язык: Английский

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Effect of electron acceptors on product selectivity and carbon flux in carbon chain elongation with Megasphaera hexanoica

The Science of The Total Environment, Год журнала: 2023, Номер 912, С. 169509 - 169509

Опубликована: Дек. 22, 2023

Megasphaera hexanoica is a bacterial strain following the reverse β-oxidation pathway to synthesize caproate (CA) using lactate (LA) as an electron donor (ED) and acetate (AA) or butyrate (BA) acceptors (EA). Differences in type concentration of EA lead distinctions product distribution energy bifurcation carbon fluxes ED pathways, thereby affecting CA production. In this study, effect various ratios AA, BA, AA+BA on flux specific titer during chain elongation M. was explored. The results indicated that maximum levels were 18.81 mM 31.48 when molar LA/AA LA/BA 10:1 3:1, respectively. Meanwhile, AA BA used combined (LA, amounts 100, 23, 77 mM), production 39.45 obtained. Further analysis revealed exhibited 49 % (4.3 19.5 higher compared respectively) 45.24 mol (80.89 58.51 respectively), indicating effective utilization rate efficiency greatly improved. Finally, scaled-up experiment conducted 1.2 L (working volume) automated bioreactor, implying high biomass (optical density at 600 nm OD600 = 1.809) slight decrease (28.45 mM). A H2 (4.11 g/m3) increase CO2 (0.632 demonstrated appropriate metabolic adaptation environmental changes such stirring shear.

Язык: Английский

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An innovative S-scheme AgCl/MIL-100(Fe) heterojunction for visible-light-driven degradation of sulfamethazine and mechanism insight

Journal of Hazardous Materials, Год журнала: 2022, Номер 435, С. 129061 - 129061

Опубликована: Май 4, 2022

Язык: Английский

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Boosting hydrogen peroxide accumulation by a novel air-breathing gas diffusion electrode in electro-Fenton system

Applied Catalysis B Environment and Energy, Год журнала: 2022, Номер 316, С. 121617 - 121617

Опубликована: Июнь 10, 2022

Electro-Fenton (EF) is a promising electrochemical technology in degrading recalcitrant organic pollutants. However, the faces problems of high energy consumption, low cathodic oxygen transfer rate and H2O2 production efficiency. Therefore, novel air-breathing gas diffusion electrode (GDE) with multiform hydrophobic layers was prepared by facile method. The GDE allows air to diffuse triphase interface spontaneously, eliminating cost aeration. Also, can greatly improve expand interfaces GDE, resulting accumulation 44.30 mg L−1 cm−2 h−1 without aeration, which 18 times higher than that virgin cathode. A 100% degradation efficiency sulfadiazine (SDZ) achieved fabricated 10 min EF system. Moreover, theoretical calculations were performed for accurately elucidating SDZ mechanism pathway.

Язык: Английский

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New insight into selective Na+ stress on acidogenic fermentation of waste activated sludge from microbial perspective: Hydrolase secretion, fermentative bacteria screening, and metabolism modification

Chemical Engineering Journal, Год журнала: 2022, Номер 442, С. 136098 - 136098

Опубликована: Март 30, 2022

Язык: Английский

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Membrane distillation treatment of landfill leachate: Characteristics and mechanism of membrane fouling

Separation and Purification Technology, Год журнала: 2022, Номер 289, С. 120787 - 120787

Опубликована: Март 5, 2022

Язык: Английский

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Enhanced anaerobic digestion of waste activated sludge by alkaline protease-catalyzing hydrolysis: Role and significance of initial pH adjustment

Chemical Engineering Journal, Год журнала: 2023, Номер 467, С. 143323 - 143323

Опубликована: Май 4, 2023

Язык: Английский

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Acclimation of anaerobic fermentation microbiome with acetate and ethanol for chain elongation and the biochemical response

Chemosphere, Год журнала: 2023, Номер 320, С. 138083 - 138083

Опубликована: Фев. 6, 2023

Язык: Английский

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Divalent cation chelation enhancing carbon migration and recovery from anaerobic fermentation of waste activated sludge

Chemical Engineering Journal, Год журнала: 2023, Номер 457, С. 141374 - 141374

Опубликована: Янв. 7, 2023

Язык: Английский

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