Genome-Centric Metatranscriptomics Analysis Reveals the Role of Hydrochar in Anaerobic Digestion of Waste Activated Sludge

Environmental Science & Technology, Год журнала: 2021, Номер 55(12), С. 8351 - 8361

Опубликована: Май 24, 2021

Anaerobic digestion (AD) of waste activated sludge (WAS) has been widely used, while it poses problems including low methane yield and production rate. Hydrochar is produced by hydrothermal liquefaction biomass; however, little known about the role hydrochar in promoting AD WAS. The present study showed that increased rate 30.8% 31.4% pretreated dewatered enhancing acidification methanogenesis processes. Genomic-centric metatranscriptomics were used to identify metabolic activities transcriptomic response individual metagenome-assembled genomes enriched hydrochar. Although Methanosarcina sp. FDU0106 had shown unable H2, complete pathway for reduction CO2 methane. Syntrophomonas FDU0164 expressed genes extracellular electron transfer via electrically pili, suggesting exchanging electrons direct interspecies transfer. expression pili was decreased, indicating could replace its roles. Additionally, Firmicutes FDU0048, Proteiniphilum FDU0082, Aminobacterium mobile FDU0089 related degradation organics, which be enhanced yield.

Язык: Английский

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Principles and advancements in improving anaerobic digestion of organic waste via direct interspecies electron transfer

Renewable and Sustainable Energy Reviews, Год журнала: 2021, Номер 148, С. 111367 - 111367

Опубликована: Июнь 19, 2021

Язык: Английский

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Enhancement of methane production from waste activated sludge using hybrid microbial electrolysis cells-anaerobic digestion (MEC-AD) process – A review

Bioresource Technology, Год журнала: 2021, Номер 346, С. 126641 - 126641

Опубликована: Дек. 29, 2021

Язык: Английский

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Quorum Sensing Enhances Direct Interspecies Electron Transfer in Anaerobic Methane Production

Environmental Science & Technology, Год журнала: 2024, Номер 58(6), С. 2891 - 2901

Опубликована: Фев. 3, 2024

Direct interspecies electron transfer (DIET) provides an innovative way to achieve efficient methanogenesis, and this study proposes a new approach upregulate the DIET pathway by enhancing quorum sensing (QS). Based on long-term reactor performance, QS enhancement achieved more vigorous methanogenesis with 98.7% COD removal efficiency. In control system, failure occurred at accumulated acetate of 7420 mg COD/L lowered pH 6.04, much lower 41.9% was observed. The significant in QS-enhancing system supported higher expression conductive pili c-Cyts cytochrome secretion-related genes, resulting 12.7- 10.3-fold improvements. Moreover, also improved energy production capability, increase F-type V/A-type ATPase 6.3- 4.2-fold, effect probably provided for nanowires secretion. From perspective community structure, increased abundance Methanosaeta Geobacter from 54.3 17.6% 63.0 33.8%, respectively. Furthermore, genes involved carbon dioxide reduction alcohol dehydrogenation 0.6- 7.1-fold, Taken together, indicates positive effects chemicals stimulate advances understanding environments such as anaerobic digesters sediments.

Язык: Английский

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Zero-valent iron enhanced methane production of anaerobic digestion by reinforcing microbial electron bifurcation coupled with direct inter-species electron transfer

Water Research, Год журнала: 2024, Номер 255, С. 121428 - 121428

Опубликована: Март 5, 2024

Язык: Английский

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