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Study of microbial community plasticity for anaerobic digestion of vegetable waste in Anaerobic Baffled Reactor

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Title Study of microbial community plasticity for anaerobic digestion of
vegetable waste in Anaerobic Baffled Reactor
 
Creator Gulhane, Madhuri
Pandit, Prabhakar
Khardenavis, Anshuman
Singh, Dharmesh
Purohit, H J
 
Subject Industrial Wastewater Reuse Recycle Recovery
Solid and Hazardous Wastes
Environmental Biotechnology
Microbiology
 
Description Anaerobic baffled reactor (ABR) provides a selective environment for the microbial community and their
respective metabolic activities, which supports the physiochemical conditions required for an optimal
performance of reactor. Hydrolysis and methanogenesis are rate limiting steps of anaerobic digestion
which are very sensitive to changes in pH. Effluent recirculation provides buffering environment as well
as prevents loss of some methanogenic population. In the present study, we used four chambered (C-1, 2,
3, and 4) anaerobic baffled reactor treating vegetable waste under three operating conditions (OCs); no
effluent recirculation (OC I), 25% effluent recirculation (OC II), 100% effluent recirculation (OC III) and
studied changes in microbial diversity along with selected parameters. OC I showed dominance of
Bacteroidetes and Firmicutes in C-1 while remaining chambers were dominated by Proteobacteria,
Bacteroidetes, Thermotogae, Spirochaetes and Chloroflexi. This demonstrated that the hydrolytic and
fermentative taxa colonized chamber C-1 while syntrophic acetogenic population dominated the
remaining chambers. However, a drastic change was observed during OC III, advocated by an increase in
diverse population from Firmicutes and Actinobacteria in all chambers. Our results suggest plasticity in
microbial population, which could ensure a better reactor performance under different OCs in ABR for
methanogenesis.
 
Publisher Elsevier
 
Date 2017
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/733/1/ABR%20Micorbial%20Community_Ren%20Energy.pdf
Gulhane, Madhuri and Pandit, Prabhakar and Khardenavis, Anshuman and Singh, Dharmesh and Purohit, H J (2017) Study of microbial community plasticity for anaerobic digestion of vegetable waste in Anaerobic Baffled Reactor. Renewable Energy, 101. pp. 59-66. ISSN 0960-1481
 
Relation https://www.journals.elsevier.com/renewable-energy/
http://neeri.csircentral.net/733/