Effective bio-treatment of fresh leachate from pretreated municipal solid waste in an expanded granular sludge bed bioreactor.
This research investigated the anaerobic biodegradation of fresh leachate from pretreated municipal solid waste (MSW) in an expanded granular sludge bed (EGSB) bioreactor under mesophilic conditions. The observations showed that this bioreactor, inoculated with anaerobic granular sludge, could be readily activated. The chemical oxygen demand (COD) removal efficiency varied between 88% and 97% under normal operation conditions, and was kept at 94-96% under the proposed optimal conditions. We noted that 60-80% of the produced biogas was methane that was yielded at a rate depending on the organic loading rate (OLR) and the liquid up-flow velocity (Vup). Significantly, 80% of loaded COD or 83% of biodegraded COD was converted to methane under the proposed optimal conditions. These findings indicate that the fresh leachate from pretreated MSW can be efficiently treated in the EGSB bioreactor, and moreover, methane, a renewable energy, can be continuously generated.
Liu
Jianyong
J
Department of Environmental Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, PR China.
Zhong
Jiangping
J
Wang
Yilan
Y
Liu
Qiang
Q
Qian
Guangren
G
Zhong
Liyun
L
Guo
Rongzhong
R
Zhang
Peijun
P
Xu
Zhi Ping
ZP
D000641:Ammonia / Q000302:isolation & purification; D001673:Biodegradation, Environmental; D056804:Biofuels; D019149:Bioreactors / Q000382:microbiology; D002245:Carbon Dioxide / Q000032:analysis; D002947:Cities; D006863:Hydrogen-Ion Concentration; D008697:Methane / Q000378:metabolism; D010100:Oxygen / Q000302:isolation & purification; D012037:Refuse Disposal / Q000295:instrumentation*; D012212:Rheology; D012722:Sewage / Q000737:chemistry* / Q000382:microbiology; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
D056804:Biofuels; D012722:Sewage; D014874:Water Pollutants, Chemical; D002245:Carbon Dioxide; D000641:Ammonia; D008697:Methane; D010100:Oxygen