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Supervised by Ministry of Industry and Information Technology of The People's Republic of China Sponsored by Harbin Institute of Technology Editor-in-chief Yu Zhou ISSNISSN 1005-9113 CNCN 23-1378/T

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Related citation:QI Pei-shi,LI Zheng,CHEN Zhao-bo.Growth properties of mixed liquor suspended solids in SMBR for pharmaceutical wastewater treatment[J].Journal of Harbin Institute Of Technology(New Series),2010,17(2):171-175.DOI:10.11916/j.issn.1005-9113.2010.02.005.
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Growth properties of mixed liquor suspended solids in SMBR for pharmaceutical wastewater treatment
Author NameAffiliation
QI Pei-shi School of Municipal and Environmental Engineering,Harbin Institute of Technology,Harbin 150090,China 
LI Zheng School of Municipal and Environmental Engineering,Harbin Institute of Technology,Harbin 150090,China 
CHEN Zhao-bo School of Material Science and Chemical Engineering,Harbin Engineering University,Harbin 150090,China 
Abstract:
This paper presents the performance results of a 366-day pilot-scale submerged membrane bioreactor (SMBR) for treating high-strength pharmaceutical wastewater. The study focuses on the growth properties of mixed liquor suspended solids (MLSS) in SMBR operated at high volumetric loading rates. The influences of MLSS on COD removal,sludge yield,oxygen utilization rates and sludge viscosity are studied. Results show that the bioreactor can be operated at higher volumetric loading rate with a low sludge yield. VSS/SS and observed sludge yield coefficient (Yo) present a decreasing trend with the decrease of hydraulic retention time (HRT) . Sludge oxygen utilization rate decreases with the increase of mixed liquor volatile suspended solids (MLVSS) . A mathematical model between sludge viscosity and MLSS is developed.
Key words:  submerged membrane bioreactor (SMBR)  pharmaceutical wastewater  mixed liquor suspended solids
DOI：10.11916/j.issn.1005-9113.2010.02.005
Clc Number:X703
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