TY - JOUR
T1 - Impact of sludge recirculation ratios on the performance of anaerobic membrane bioreactor for wastewater treatment
AU - Aslam, Alia
AU - Khan, Sher Jamal
AU - Shahzad, Hafiz Muhammad Aamir
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/9
Y1 - 2019/9
N2 - The performance of a lab scale anaerobic membrane bioreactor (AnMBR) was evaluated for wastewater treatment. The efficacy of the system was determined at different operating conditions in terms of fluxes and recirculation ratios (R); 10.28 L/m2 h (R = 1, Phase I), 8.8 L/m2 h (R = 2, Phase II and R = 3, Phase III) and 6 L/m2 h (R = 2, Phase IV and R = 3, Phase V), respectively. In comparison with all the operating conditions tested, optimum efficacy of the system was found at flux of 6 L/m2 h and R of 3 in terms of highest COD removal (96.7%), and maximum biogas yield (0.44 L/g CODremoved). The MLSS and MLVSS concentrations under optimum phase were 6.23 and 4.83 g/L, respectively at OLR of 0.46 kg COD/m3 day. The system also exhibited significant reduction of foulants i.e. extracellular polymeric substances (EPS) and soluble microbial products (SMP) resulting in longer membrane runs in optimized phase.
AB - The performance of a lab scale anaerobic membrane bioreactor (AnMBR) was evaluated for wastewater treatment. The efficacy of the system was determined at different operating conditions in terms of fluxes and recirculation ratios (R); 10.28 L/m2 h (R = 1, Phase I), 8.8 L/m2 h (R = 2, Phase II and R = 3, Phase III) and 6 L/m2 h (R = 2, Phase IV and R = 3, Phase V), respectively. In comparison with all the operating conditions tested, optimum efficacy of the system was found at flux of 6 L/m2 h and R of 3 in terms of highest COD removal (96.7%), and maximum biogas yield (0.44 L/g CODremoved). The MLSS and MLVSS concentrations under optimum phase were 6.23 and 4.83 g/L, respectively at OLR of 0.46 kg COD/m3 day. The system also exhibited significant reduction of foulants i.e. extracellular polymeric substances (EPS) and soluble microbial products (SMP) resulting in longer membrane runs in optimized phase.
KW - Anaerobic membrane bioreactor (AnMBR)
KW - Biogas production
KW - Filtration cycles
KW - Membrane fouling
KW - Recirculation ratios
KW - Wastewater treatment
UR - http://www.scopus.com/inward/record.url?scp=85065989510&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2019.121473
DO - 10.1016/j.biortech.2019.121473
M3 - Article
C2 - 31129515
AN - SCOPUS:85065989510
SN - 0960-8524
VL - 288
JO - Bioresource Technology
JF - Bioresource Technology
M1 - 121473
ER -