Study on short-chain fatty acids production from anaerobic fermentation of waste activated sludge pretreated by alkali-activated ammonium persulfate

Bioresource Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132461 - 132461

Published: March 1, 2025

Language: Английский

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Surfactant-assisted thermal hydrolysis of sewage sludge: Biomolecule extraction and its potential for protease production

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(5), P. 113353 - 113353

Published: June 18, 2024

Efficient management of sewage sludge from wastewater treatment plants (WWTPs) are crucial to obtain industrial value-added products and reducing environmental impact. Thermal hydrolysis, coupled with surfactants enhance solubilisation, offers a promising approach for treatment. This study assessed the impact four surfactants: sodium dodecyl sulphate (SDS), dodecylbenzenesulfonate (SDBS), cetyl trimethyl ammonium chloride (CTAC), tetraethylammonium (TAC) on thermal hydrolysis sludge. The addition anionic (SDS SDBS) significantly increased biomolecule production, proteins, humic-like substances, carbohydrates, DNA concentrations reaching 6018 ± 28 mg/L (306 mg/gVSSo), 2496 103 (127 1822 4 (93 389 3 (20 respectively, after 155 min hydrolysis. Low levels (10 50 mg/gVSSo) also led substantial increase in readily biodegradable fraction hydrolysed sludge, up 90 %. Additionally, surfactant-assisted proved be favourable substrate protease production using Bacillus licheniformis. optimal enzymatic activity 678 14 U/mL was achieved when CTAC added at concentration 10 mg/gVSSo. In summary, this evaluated an innovative solubilisation biomolecules methodology not only positively affected biodegradability but suitable potentially producing valuable like proteases through fermentation B. licheniformis, thus offering new strategy sustainable

Language: Английский

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Effects of Carotenoid Organic Biomass Acclimated Sludge on Multisubstrate Anaerobic Co-Digestion: Methane Production, Inoculant/Substrate Ratio, and Key Enzymes

Published: Jan. 1, 2024

The main research object of this project is to domesticate the sludge anaerobic system winery with high concentration organic biomass (such as waste carotene) carbon source through Information Bio-Booster system, and study internal mechanism improving efficiency stability on-site digestion. Results showed that highest methane production (763.03 ml/g-volatile solids) from inoculated domesticated (I) was achieved at an I/S (co-substrate) ratio 3, increase about 50% compared other ratios studied. Further analysis by macro-genomic macro-proteomic sequencing revealed key enzyme activities were enhanced; major metabolic pathways up-regulated; hydrolysing methanogenic bacteria enriched. These results suggest improved for rapid utilization matter methanogenesis.

Language: Английский

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Synergistic Enhancement of the Secondary Peak in Methane Production from Anaerobic Digestion of Corn Stover: The Combined Effects of Polydopamine Thermally Modified Tourmaline and Magnetic Field

Energy, Journal Year: 2024, Volume and Issue: 308, P. 133046 - 133046

Published: Aug. 31, 2024

Language: Английский

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Continuous augmentation of anaerobic digestion with electroactive microorganisms: Performance and stability

Bioresource Technology, Journal Year: 2024, Volume and Issue: unknown, P. 131523 - 131523

Published: Sept. 1, 2024

Language: Английский

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