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

Bioresource Technology, Год журнала: 2025, Номер unknown, С. 132461 - 132461

Опубликована: Март 1, 2025

Язык: 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, Год журнала: 2024, Номер 12(5), С. 113353 - 113353

Опубликована: Июнь 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

Язык: 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

Опубликована: Янв. 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.

Язык: 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, Год журнала: 2024, Номер 308, С. 133046 - 133046

Опубликована: Авг. 31, 2024

Язык: Английский

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

Bioresource Technology, Год журнала: 2024, Номер unknown, С. 131523 - 131523

Опубликована: Сен. 1, 2024

Язык: Английский

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