TY - JOUR
T1 - Influence of relaxation modes on membrane fouling in submerged membrane bioreactor for domestic wastewater treatment
AU - Habib, Rasikh
AU - Asif, Muhammad Bilal
AU - Iftekhar, Sidra
AU - Khan, Zahiruddin
AU - Gurung, Khum
AU - Srivastava, Varsha
AU - Sillanpää, Mika
N1 - Generated from Scopus record by KAUST IRTS on 2023-09-23
PY - 2017/1/1
Y1 - 2017/1/1
N2 - Relaxation and backwashing have become an integral part of membrane bioreactor (MBR) operations for fouling control. This study was carried out on real municipal wastewater to evaluate the influence of different operational strategies on membrane fouling at equivalent water yield. Four relaxation modes (MBR10+0, MBR10+1, MBR10+1.5 and MBR10+2) were tested to analyze membrane fouling behavior. For the optimization of relaxation modes, fouling rate in terms of trans-membrane pressure, hydraulic resistances and characteristics of fouling fractions were analyzed. It has been observed that cake layer resistance was minimum in MBR10+1.5 but pore blockage resistance was increased in all relaxation modes. Moreover, high instantaneous flux contributed significantly to fouling rate at the initial stage of MBR operations. Relaxation modes were also efficient in removing irreversible fouling to some extent. Under all relaxation modes, COD removal efficiency ranged from 92 to 96.5%. Ammonium and TP removal were on the lower side due to the short solids and hydraulic retention time.
AB - Relaxation and backwashing have become an integral part of membrane bioreactor (MBR) operations for fouling control. This study was carried out on real municipal wastewater to evaluate the influence of different operational strategies on membrane fouling at equivalent water yield. Four relaxation modes (MBR10+0, MBR10+1, MBR10+1.5 and MBR10+2) were tested to analyze membrane fouling behavior. For the optimization of relaxation modes, fouling rate in terms of trans-membrane pressure, hydraulic resistances and characteristics of fouling fractions were analyzed. It has been observed that cake layer resistance was minimum in MBR10+1.5 but pore blockage resistance was increased in all relaxation modes. Moreover, high instantaneous flux contributed significantly to fouling rate at the initial stage of MBR operations. Relaxation modes were also efficient in removing irreversible fouling to some extent. Under all relaxation modes, COD removal efficiency ranged from 92 to 96.5%. Ammonium and TP removal were on the lower side due to the short solids and hydraulic retention time.
UR - https://linkinghub.elsevier.com/retrieve/pii/S0045653517305726
UR - http://www.scopus.com/inward/record.url?scp=85017424321&partnerID=8YFLogxK
U2 - 10.1016/j.chemosphere.2017.04.048
DO - 10.1016/j.chemosphere.2017.04.048
M3 - Article
SN - 1879-1298
VL - 181
SP - 19
EP - 25
JO - Chemosphere
JF - Chemosphere
ER -