TY - JOUR
T1 - Insight into influence of iron addition in membrane bioreactor on gel layer fouling
AU - Zhang, Haifeng
AU - Lu, Xin
AU - Yu, Haihuan
AU - Song, Lianfa
N1 - Funding Information:
This work was supported by the National Science Foundation of China (No. 51478093), the
Funding Information:
Jilin Province Scientific and Technological Planning Project of China (No. 20170519013JH & No. 20150519020 JH).
Publisher Copyright:
© 2017 Techno-Press, Ltd.
PY - 2017/11/1
Y1 - 2017/11/1
N2 - Membrane fouling in membrane bioreactor (MBR) remains a primary challenge for its wider application. The focus of this study to investigate the influence of iron distribution in activated sludge on gel layer fouling in MBR. Significant reduction in the transmembrane pressure (TMP) rise rates was observed in the presence of iron as result of retarding the gel layer formation time. The spatial distribution of iron had a significant impact on the stratification structure of extracellular polymeric substances (EPS) fractions, such as proteins (PN) and polysaccharides (PS). A mitigation of PN or PS from the supernatant to the EPS inner layers was observed in the presence of iron. Compared with the control reactor, the reduction in PN and PS of the supernatant and lower PN/PS rates of the LB-EPS were beneficial to decrease the membrane fouling potential during the gel layer formation. Consequently, the iron addition managed to control gel layer fouling could be a useful strategy in MBR.
AB - Membrane fouling in membrane bioreactor (MBR) remains a primary challenge for its wider application. The focus of this study to investigate the influence of iron distribution in activated sludge on gel layer fouling in MBR. Significant reduction in the transmembrane pressure (TMP) rise rates was observed in the presence of iron as result of retarding the gel layer formation time. The spatial distribution of iron had a significant impact on the stratification structure of extracellular polymeric substances (EPS) fractions, such as proteins (PN) and polysaccharides (PS). A mitigation of PN or PS from the supernatant to the EPS inner layers was observed in the presence of iron. Compared with the control reactor, the reduction in PN and PS of the supernatant and lower PN/PS rates of the LB-EPS were beneficial to decrease the membrane fouling potential during the gel layer formation. Consequently, the iron addition managed to control gel layer fouling could be a useful strategy in MBR.
KW - Extracellular polymeric substances (EPS)
KW - Gel layer fouling
KW - Membrane bioreactor (MBR)
KW - Stratification structure
KW - Transmembrane pressure (TMP)
UR - http://www.scopus.com/inward/record.url?scp=85040125877&partnerID=8YFLogxK
U2 - 10.12989/mwt.2017.8.6.543
DO - 10.12989/mwt.2017.8.6.543
M3 - Article
AN - SCOPUS:85040125877
SN - 2005-8624
VL - 8
SP - 543
EP - 551
JO - Membrane Water Treatment
JF - Membrane Water Treatment
IS - 6
ER -