TY - JOUR
T1 - Influence of operation conditions on methane production from swine wastewater treated by a self-agitation anaerobic reactor
AU - Jiang, Mengmeng
AU - Qiao, Wei
AU - Ren, Zhengran
AU - Mahdy, Ahmed
AU - Wandera, Simon M.
AU - Li, Yuyou
AU - Dong, Renjie
N1 - Funding Information:
This work was partially supported by the National Key Research and Development Program of China ( 2016YFD0501403 ). Ahmed Mahdy would like to thank for the financial support from State Administration of Foreign Experts Affairs, China . (Project No. WQ20180011 ).
Funding Information:
This work was partially supported by the National Key Research and Development Program of China (2016YFD0501403). Ahmed Mahdy would like to thank for the financial support from State Administration of Foreign Experts Affairs, China. (Project No. WQ20180011).
Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/9
Y1 - 2019/9
N2 - This study aimed to evaluate both the feasibility of using ambient temperatures (15, 20 and 25 °C) in a self-agitated anaerobic baffled reactor (SaABR) fed with swine wastewater, and the impact of decreasing the hydraulic retention time (HRT) down to 3 days. The highest specific methane yield (0.61 ± 0.14 L/gVSin) and organics conversation efficiency (66% on TCOD basis) were attained by elevating temperature from 15 to 25 °C under an HRT of 10 days. Even though the highest volumetric methane yield (0.85 ± 0.17 L/L/day) was registered during a 3-day HRT, the specific methane yield was lower as a result of volatile fatty acids accumulations (up to 790 ± 39 mg/L). The dominant bacterium was Clostridium sensu stricto while Methanosaeta was the dominant archaea throughout all the conditions, indicating strong acetoclastic methanogenic activity under ambient temperatures. These results demonstrate that using ambient temperatures and short HRTs is a promising strategy to successfully treat wastewater with decreasing energetics entries. This can, thereby, increase the treatment capacity and enhance the methane yield during the anaerobic digestion process.
AB - This study aimed to evaluate both the feasibility of using ambient temperatures (15, 20 and 25 °C) in a self-agitated anaerobic baffled reactor (SaABR) fed with swine wastewater, and the impact of decreasing the hydraulic retention time (HRT) down to 3 days. The highest specific methane yield (0.61 ± 0.14 L/gVSin) and organics conversation efficiency (66% on TCOD basis) were attained by elevating temperature from 15 to 25 °C under an HRT of 10 days. Even though the highest volumetric methane yield (0.85 ± 0.17 L/L/day) was registered during a 3-day HRT, the specific methane yield was lower as a result of volatile fatty acids accumulations (up to 790 ± 39 mg/L). The dominant bacterium was Clostridium sensu stricto while Methanosaeta was the dominant archaea throughout all the conditions, indicating strong acetoclastic methanogenic activity under ambient temperatures. These results demonstrate that using ambient temperatures and short HRTs is a promising strategy to successfully treat wastewater with decreasing energetics entries. This can, thereby, increase the treatment capacity and enhance the methane yield during the anaerobic digestion process.
KW - Ambient temperature
KW - Hydraulic retention time
KW - Methanogenic activity
KW - Self-agitation anaerobic baffled reactor
KW - Swine wastewater
UR - http://www.scopus.com/inward/record.url?scp=85066446220&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85066446220&partnerID=8YFLogxK
U2 - 10.1016/j.ibiod.2019.05.027
DO - 10.1016/j.ibiod.2019.05.027
M3 - Article
AN - SCOPUS:85066446220
SN - 0964-8305
VL - 143
JO - International Biodeterioration and Biodegradation
JF - International Biodeterioration and Biodegradation
M1 - 104710
ER -