TY - JOUR
T1 - Performance enhancement and fouling mitigation by organic flocculant addition in membrane bioreactor at high salt shock
AU - Zhang, Haifeng
AU - Gao, Zhongyu
AU - Zhang, Lanhe
AU - Song, Lianfa
PY - 2014/7
Y1 - 2014/7
N2 - The main objective of this study was to investigate the effect of an organic flocculant (MPE50) addition on reducing membrane fouling and enhancing performance in membrane bioreactor (MBR) at the high salt shock. Results show that MPE50 addition is a reliable and effective approach in terms of both membrane fouling mitigation and pollutants removal improvement in the case of high salt shock. Compared to the control reactor, the MBR with MPE50 addition enhanced the average removal of COD, NH4+-N and TP by 4.1%, 13.2% and 21.2%, respectively. Due to the effect of flocculation and adsorption by MPE50, a significant reduction in the soluble microbial products (SMP) proteins amount was observed. As a result, the membrane fouling rate was mitigated successfully. Further, the increasing of mean particles size, Zeta potential and related hydrophobicity of the flocs would also have positive impacts on membrane fouling mitigation.
AB - The main objective of this study was to investigate the effect of an organic flocculant (MPE50) addition on reducing membrane fouling and enhancing performance in membrane bioreactor (MBR) at the high salt shock. Results show that MPE50 addition is a reliable and effective approach in terms of both membrane fouling mitigation and pollutants removal improvement in the case of high salt shock. Compared to the control reactor, the MBR with MPE50 addition enhanced the average removal of COD, NH4+-N and TP by 4.1%, 13.2% and 21.2%, respectively. Due to the effect of flocculation and adsorption by MPE50, a significant reduction in the soluble microbial products (SMP) proteins amount was observed. As a result, the membrane fouling rate was mitigated successfully. Further, the increasing of mean particles size, Zeta potential and related hydrophobicity of the flocs would also have positive impacts on membrane fouling mitigation.
KW - Extracellular polymeric substances
KW - High salt shock
KW - Membrane bioreactor
KW - Modified fouling index
KW - Soluble microbial products
UR - http://www.scopus.com/inward/record.url?scp=84900508063&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2014.04.053
DO - 10.1016/j.biortech.2014.04.053
M3 - Article
C2 - 24835916
AN - SCOPUS:84900508063
SN - 0960-8524
VL - 164
SP - 34
EP - 40
JO - Bioresource Technology
JF - Bioresource Technology
ER -