TY - JOUR
T1 - Seasonal characteristics of supernatant organics and its effect on membrane fouling in a full-scale membrane bioreactor
AU - Sun, Jianyu
AU - Xiao, Kang
AU - Mo, Yinghui
AU - Liang, Peng
AU - Shen, Yuexiao
AU - Zhu, Ningwei
AU - Huang, Xia
N1 - Funding Information:
This work was supported by the Major Science and Technology Program for Water Pollution Control and Treatment (No. 2011ZX07317-002 ), the International Program of MOST (No. S2011ZR0434 ) and Program for Changjiang Scholars and Innovative Research Team in University . Support provided to Dr. Xiao for this work by China Postdoctoral Science Foundation funded project (No. 2012M510033 ) is also gratefully acknowledged.
PY - 2014/3/1
Y1 - 2014/3/1
N2 - Despite the potentially important effect of temperature on membrane fouling, very few investigations have been conducted on full-scale membrane bioreactors (MBRs) regarding seasonal variation of fouling. In this study, fouling behavior in a full-scale MBR (capacity 60,000m3/d) in northern China was monitored for a whole year. As the mixed liquor temperature dropped from 27 to 13°C, the filtration resistance increased from 0.6×1013 to 2.6×1013m-1, which was attributable to higher concentration of supernatant organics at lower temperatures. Humic substances were the predominant supernatant organics (10-25mg/L) in comparison with polysaccharides and proteins (both 5-15mg/L). The dependence of seasonal supernatant fouling potential on hydrophilic/hydrophobic composition and molecular weight distribution of the organics were analyzed based on statistical correlation. Humic substances in all hydrophobicity and molecular weight ranges correlated closely with the fouling potential. Hydrophilic polysaccharides and large-molecular-weight proteins were also found to contribute to the fouling potential.
AB - Despite the potentially important effect of temperature on membrane fouling, very few investigations have been conducted on full-scale membrane bioreactors (MBRs) regarding seasonal variation of fouling. In this study, fouling behavior in a full-scale MBR (capacity 60,000m3/d) in northern China was monitored for a whole year. As the mixed liquor temperature dropped from 27 to 13°C, the filtration resistance increased from 0.6×1013 to 2.6×1013m-1, which was attributable to higher concentration of supernatant organics at lower temperatures. Humic substances were the predominant supernatant organics (10-25mg/L) in comparison with polysaccharides and proteins (both 5-15mg/L). The dependence of seasonal supernatant fouling potential on hydrophilic/hydrophobic composition and molecular weight distribution of the organics were analyzed based on statistical correlation. Humic substances in all hydrophobicity and molecular weight ranges correlated closely with the fouling potential. Hydrophilic polysaccharides and large-molecular-weight proteins were also found to contribute to the fouling potential.
KW - Fouling behavior
KW - Full-scale membrane bioreactor
KW - Statistical correlation analysis
KW - Supernatant organics
KW - Temperature
UR - http://www.scopus.com/inward/record.url?scp=84888266260&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2013.11.003
DO - 10.1016/j.memsci.2013.11.003
M3 - Article
AN - SCOPUS:84888266260
SN - 0376-7388
VL - 453
SP - 168
EP - 174
JO - Journal of Membrane Science
JF - Journal of Membrane Science
ER -