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

Bioresource Technology, Journal Year: 2022, Volume and Issue: 359, P. 127420 - 127420

Published: June 9, 2022

Language: Английский

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Microbial proteases and their applications

Frontiers in Microbiology, Journal Year: 2023, Volume and Issue: 14

Published: Sept. 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.

Language: 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, Journal Year: 2023, Volume and Issue: 912, P. 169509 - 169509

Published: Dec. 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.

Language: 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, Journal Year: 2022, Volume and Issue: 435, P. 129061 - 129061

Published: May 4, 2022

Language: 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, Journal Year: 2022, Volume and Issue: 316, P. 121617 - 121617

Published: June 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.

Language: 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, Journal Year: 2022, Volume and Issue: 442, P. 136098 - 136098

Published: March 30, 2022

Language: Английский

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

Separation and Purification Technology, Journal Year: 2022, Volume and Issue: 289, P. 120787 - 120787

Published: March 5, 2022

Language: 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, Journal Year: 2023, Volume and Issue: 467, P. 143323 - 143323

Published: May 4, 2023

Language: Английский

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

Chemosphere, Journal Year: 2023, Volume and Issue: 320, P. 138083 - 138083

Published: Feb. 6, 2023

Language: Английский

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

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 457, P. 141374 - 141374

Published: Jan. 7, 2023

Language: Английский

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