TY - JOUR
T1 - Anaerobic submerged membrane bioreactor (AnSMBR) for municipal wastewater treatment under mesophilic and psychrophilic temperature conditions
AU - Martinez-Sosa, David
AU - Helmreich, Brigitte
AU - Netter, Thomas
AU - Paris, Stefania
AU - Bischof, Franz
AU - Horn, Harald
N1 - Funding Information:
This research was supported by the German Ministry for Education and Research (BMBF), project contract No. 02WA0854/55. Authors thank the Mexican National Council for Science and Technology (CONACYT) and the German Academic Exchange Service (DAAD) for the grant to David Martinez.
PY - 2011/11
Y1 - 2011/11
N2 - A pilot scale anaerobic submerged membrane bioreactor (AnSMBR) with an external filtration unit for municipal wastewater treatment was operated for 100days. Besides gas sparging, additional shear was created by circulating sludge to control membrane fouling. During the first 69days, the reactor was operated under mesophilic temperature conditions. Afterwards, the temperature was gradually reduced to 20°C. A slow and linear increase in the filtration resistance was observed under critical flux conditions (7L/(m2h)) at 35°C. However, an increase in the fouling rate probably linked to an accumulation of solids, a higher viscosity and soluble COD concentrations in the reactor was observed at 20°C. The COD removal efficiency was close to 90% under both temperature ranges. Effluent COD and BOD5 concentrations were lower than 80 and 25mg/L, respectively. Pathogen indicator microorganisms (fecal coliforms bacteria) were reduced by log105. Hence, the effluent could be used for irrigation purposes in agriculture.
AB - A pilot scale anaerobic submerged membrane bioreactor (AnSMBR) with an external filtration unit for municipal wastewater treatment was operated for 100days. Besides gas sparging, additional shear was created by circulating sludge to control membrane fouling. During the first 69days, the reactor was operated under mesophilic temperature conditions. Afterwards, the temperature was gradually reduced to 20°C. A slow and linear increase in the filtration resistance was observed under critical flux conditions (7L/(m2h)) at 35°C. However, an increase in the fouling rate probably linked to an accumulation of solids, a higher viscosity and soluble COD concentrations in the reactor was observed at 20°C. The COD removal efficiency was close to 90% under both temperature ranges. Effluent COD and BOD5 concentrations were lower than 80 and 25mg/L, respectively. Pathogen indicator microorganisms (fecal coliforms bacteria) were reduced by log105. Hence, the effluent could be used for irrigation purposes in agriculture.
KW - Anaerobic submerged membrane bioreactor
KW - Critical flux
KW - Mesophilic treatment
KW - Municipal wastewater
KW - Psychrophilic treatment
UR - http://www.scopus.com/inward/record.url?scp=80054841704&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2011.09.012
DO - 10.1016/j.biortech.2011.09.012
M3 - Article
C2 - 21962536
AN - SCOPUS:80054841704
SN - 0960-8524
VL - 102
SP - 10377
EP - 10385
JO - Bioresource Technology
JF - Bioresource Technology
IS - 22
ER -
