Effect of membrane bioreactor configurations on sludge structure and microbial activity

被引：21
作者：
Clouzot, L. [1 ]
Roche, N. [1 ]
Marrot, B. [1 ]
机构：
[1] Univ Aix Marseille 3, Lab Modelisat Mecan & Procedes Propres M2P2, UMR 6181, F-13545 Aix En Provence, France
来源：
BIORESOURCE TECHNOLOGY | 2011年 / 102卷 / 02期
关键词：
Membrane bioreactor; Heterotrophic; Autotrophic; Soluble microbial products; Viscosity; WASTE-WATER TREATMENT; RHEOLOGICAL CHARACTERIZATION; ACTIVATED-SLUDGE; FLUX; ULTRAFILTRATION; REMOVAL;
D O I：
10.1016/j.biortech.2010.09.058
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The aim of this paper was to determine the effect of two different membrane bioreactor (MBR) configurations (external/immersed) on sludge structure and microbial activity. Sludge structure was deduced from rheological measurements. The high shear stress induced by the recirculation pump in the external MBR was shown to result in decreasing viscosity due to activated sludge (AS) deflocculation. Besides, soluble microbial products (SMP) release was higher in the external MBR (5 mg(COD) g(MLVSS)(-1)) than in the immersed configuration (2 mg(COD) g(MLVSS)(-1)). Microbial activity was followed from respirometry tests by focusing on the distinction between heterotrophs and autotrophs. An easier autotrophic microbe development was then observed in the immersed MBR compared to the external one. However, the external MBR was shown to allow better heterotrophic microbe development. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：975 / 981
页数：7
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