title: Effect of temperature on the treatment of domestic wastewater with a staged anaerobic fluidized membrane bioreactor.
abstract: A laboratory staged anaerobic fluidized membrane bioreactor (SAF-MBR) system was applied to the treatment of primary clarifier effluent from a domestic wastewater treatment plant with temperature decreasing from 25 to 10 °C. At all temperatures and with a total hydraulic retention time of 2.3 h, overall chemical oxygen demand (COD) and biochemical oxygen demand (BOD5) removals were 89% and 94% or higher, with permeate COD and BOD5 of 30 and 7 mg/L or lower, respectively. No noticeable negative effects of low temperature on organic removal were found, although a slight increase to 3 mg/L in volatile fatty acids concentrations in the effluent was observed. Biosolids production was 0.01-0.03 kg volatile suspended solids/kg COD, which is far less than that with aerobic processes. Although the rate of trans-membrane pressure at the membrane flux of 9 L/m(2)/h increased as temperature decreased, the SAF-MBR was operated for longer than 200 d before chemical cleaning was needed. Electrical energy potential from combustion of the total methane production (gaseous and dissolved) was more than that required for system operation.
authors.affiliation: Department of Environmental Engineering, Inha University, Namgu, Inharo 100, Incheon, Republic of Korea E-mail: jhb@inha.ac.kr.
authors.forename: R H
authors.initials: RH
authors.lastname: Yoo
authors.affiliation: Department of Environmental Engineering, Inha University, Namgu, Inharo 100, Incheon, Republic of Korea E-mail: jhb@inha.ac.kr.
authors.forename: J H
authors.initials: JH
authors.lastname: Kim
authors.affiliation: Department of Environmental Engineering, Inha University, Namgu, Inharo 100, Incheon, Republic of Korea E-mail: jhb@inha.ac.kr; Department of Civil and Environmental Engineering, Stanford University, Stanford, CA 94305, USA.
authors.forename: P L
authors.initials: PL
authors.lastname: McCarty
authors.affiliation: Department of Environmental Engineering, Inha University, Namgu, Inharo 100, Incheon, Republic of Korea E-mail: jhb@inha.ac.kr.
authors.forename: J H
authors.initials: JH
authors.lastname: Bae
mesh_terms: D000693:Anaerobiosis; D057219:Biofouling / Q000517:prevention & control; D019149:Bioreactors; D008567:Membranes, Artificial; D013696:Temperature; D062065:Wastewater / Q000032:analysis; D018508:Water Purification
chemical_list: D008567:Membranes, Artificial; D062065:Wastewater