TY - JOUR
T1 - Treatment of papermaking wastewater using a membrane bio-reactor
AU - Tang, Wu Xiao
AU - Li, Wei Xing
AU - Xing, Wei Hong
N1 - Publisher Copyright:
© 2016, Editorial Board of “Journal of Chemical Engineering of Chinese Universities”. All right reserved.
PY - 2016/4/1
Y1 - 2016/4/1
N2 - With the development of papermaking industry, the demand for fresh water and discharge of wastewater become a severe problem. In this work, a membrane bio-reactor (MBR) was employed to treat papermaking wastewater, and the effects of membrane pore size and operation parameters on the performance of MBR were investigated. In addition, membrane filtration behavior and fouling phenomena were analyzed. The optimized membrane pore size is found as 300 nm with aeration rate of 1800 L·(m2·h)-1, membrane flux of 19 L·(m2·h)-1 and mixed liquid suspended solids (MLSS) of 6 g·L-1. During a long-term run of 105 days, membrane performance keeps stable and the increase of atmosphere temperature prolongs the operation cycle. Meanwhile, the effluent quality is superior to that of traditional processes. The average removal rate of COD, turbidity, NH3-N, TP, chromaticity and TOC are 92%, 99%, 93%, 73%,98% and 88%, respectively. The analysis results show that organic matters are the main factors causing membrane fouling when MBR is used. However, the high content of Ca (9%) indicates that inorganic fouling should also not be neglected in papermaking wastewater. When the transmembrane pressure (TMP) reaches to 40 kPa, the fouled membrane is immersed in NaClO (0.5 %(wt)) and then citric acid (0.3%(wt)) solutions for 2 h, respectively the membrane flux can be recovered up to 92% of its original value.
AB - With the development of papermaking industry, the demand for fresh water and discharge of wastewater become a severe problem. In this work, a membrane bio-reactor (MBR) was employed to treat papermaking wastewater, and the effects of membrane pore size and operation parameters on the performance of MBR were investigated. In addition, membrane filtration behavior and fouling phenomena were analyzed. The optimized membrane pore size is found as 300 nm with aeration rate of 1800 L·(m2·h)-1, membrane flux of 19 L·(m2·h)-1 and mixed liquid suspended solids (MLSS) of 6 g·L-1. During a long-term run of 105 days, membrane performance keeps stable and the increase of atmosphere temperature prolongs the operation cycle. Meanwhile, the effluent quality is superior to that of traditional processes. The average removal rate of COD, turbidity, NH3-N, TP, chromaticity and TOC are 92%, 99%, 93%, 73%,98% and 88%, respectively. The analysis results show that organic matters are the main factors causing membrane fouling when MBR is used. However, the high content of Ca (9%) indicates that inorganic fouling should also not be neglected in papermaking wastewater. When the transmembrane pressure (TMP) reaches to 40 kPa, the fouled membrane is immersed in NaClO (0.5 %(wt)) and then citric acid (0.3%(wt)) solutions for 2 h, respectively the membrane flux can be recovered up to 92% of its original value.
KW - Design parameter
KW - MBR
KW - Membrane fouling
KW - Papermaking wastewater
UR - http://www.scopus.com/inward/record.url?scp=84968649919&partnerID=8YFLogxK
U2 - 10.3969/j.issn.1003-9015.2016.02.027
DO - 10.3969/j.issn.1003-9015.2016.02.027
M3 - 文章
AN - SCOPUS:84968649919
SN - 1003-9015
VL - 30
SP - 439
EP - 445
JO - Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities
JF - Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities
IS - 2
ER -