TY - JOUR
T1 - Influence of filter aid on MBR perfomance and fouling after high salt shock
AU - Zhang, Haifeng
AU - Yang, Liping
AU - Song, L.
AU - Zhang, Lanhe
N1 - Publisher Copyright:
© All Rights Reserved.
PY - 2014/8/1
Y1 - 2014/8/1
N2 - The main objective of this study was to investigate the effect of diatomite filter aid on fouling and performance of membrane bioreactor (MBR) after high salt shock. The results show that diatomite additive is an effective approach for the performance improvement of both membrane fouling and pollutants removal when MBR was suffering high salt shock. Compared with the control reactor, the performance of MBR is enhanced by addition of 60 mg·L-1 diatomite addition, the removal of COD, NH4+-N and TP increases by 4.9%, 3.2% and 74.5%, respectively. It was observed that after high salt shock the membrane fouling rate is significantly higher, about four-fold, for the contrast than for the MBR with diatomite addition. The flocculating and adsorption capacities of diatomite make soluble products of microbial metabolism (SMP) significant decrease. So, the rate of membrane fouling was significantly mitigated. Furthermore, the addition of diatomite makes mean flocs sizes (dp) and its related hydrophobic (RH) increase, which would be beneficial to the mitigation of membrane fouling.
AB - The main objective of this study was to investigate the effect of diatomite filter aid on fouling and performance of membrane bioreactor (MBR) after high salt shock. The results show that diatomite additive is an effective approach for the performance improvement of both membrane fouling and pollutants removal when MBR was suffering high salt shock. Compared with the control reactor, the performance of MBR is enhanced by addition of 60 mg·L-1 diatomite addition, the removal of COD, NH4+-N and TP increases by 4.9%, 3.2% and 74.5%, respectively. It was observed that after high salt shock the membrane fouling rate is significantly higher, about four-fold, for the contrast than for the MBR with diatomite addition. The flocculating and adsorption capacities of diatomite make soluble products of microbial metabolism (SMP) significant decrease. So, the rate of membrane fouling was significantly mitigated. Furthermore, the addition of diatomite makes mean flocs sizes (dp) and its related hydrophobic (RH) increase, which would be beneficial to the mitigation of membrane fouling.
KW - Extracellular polymeric substances
KW - High salt shock
KW - Membrane bioreactor
KW - Membrane fouling
KW - Soluble microbial product
UR - http://www.scopus.com/inward/record.url?scp=84906896314&partnerID=8YFLogxK
U2 - 10.3969/j.issn.0438-1157.2014.08.049
DO - 10.3969/j.issn.0438-1157.2014.08.049
M3 - Article
AN - SCOPUS:84906896314
SN - 0438-1157
VL - 65
SP - 3212
EP - 3220
JO - Huagong Xuebao/CIESC Journal
JF - Huagong Xuebao/CIESC Journal
IS - 8
ER -