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Responses of microbial capacity and community on the performance of mesophilic co-digestion of food waste and waste activated sludge in a high-frequency feeding CSTR
- Source :
- Bioresource Technology. 260:85-94
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- To understand the relationship between microbes and digester performance of high-frequency feeding CSTR, which could achieve stable CH4 production at high OLR by easing instantaneous feeding shock, attentions were paid on the variations of methanogenic capacity (MC) and microbial community with OLR increasing. Results showed that the MC for feedstock degradation could satisfy the need of effective conversion from feedstock to CH4 when the OLR remained below 16.4 g-TS/L/d. Furthermore, the MC for acetate, propionate and butyrate degradation increased by 73.8%, 303%, and 164%, respectively, with OLR increasing from 3.03 g-TS/L/d 12.6 g-TS/L/d. The evolution of both bacterial and archaeal communities provided additional information on the adaptation of functional microbes to environmental factors. The significant increase of abundance of Methanoculleus and Methanomassiliicoccus likely promoted the utilization of H2, thus facilitating syntrophic methanogenesis, and consequently ensuring efficient CH4 production in stable stage.
- Subjects :
- Environmental Engineering
Methanogenesis
0208 environmental biotechnology
Bioengineering
02 engineering and technology
010501 environmental sciences
Raw material
01 natural sciences
Bioreactors
Anaerobiosis
Food science
Waste Management and Disposal
0105 earth and related environmental sciences
chemistry.chemical_classification
Sewage
biology
Renewable Energy, Sustainability and the Environment
General Medicine
Biodegradable waste
biology.organism_classification
Archaea
020801 environmental engineering
Food waste
Methanoculleus
Activated sludge
chemistry
Food
Propionate
Methane
Mesophile
Subjects
Details
- ISSN :
- 09608524
- Volume :
- 260
- Database :
- OpenAIRE
- Journal :
- Bioresource Technology
- Accession number :
- edsair.doi.dedup.....6c1c116745b4969b4bc90f3a92ad8894