Growth properties of mixed liquor suspended solids in SMBR for pharmaceutical wastewater treatment
QI Pei-shi1, LI Zheng1, CHEN Zhao-bo2
1.School of Municipal and Environmental Engineering,Harbin Institute of Technology,Harbin 150090,China;2.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
Fund:
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Growth properties of mixed liquor suspended solids in SMBR for pharmaceutical wastewater treatment
本站小编 哈尔滨工业大学/2019-10-23
相关话题/Growth properties mixed liquor suspended
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