Biomass effects on oxygen transfer in membrane bioreactors

被引：121

作者：

Germain, E.

Nelles, F.

Drews, A.

Pearce, R.

Kraume, M.

Reid, E.

Judd, S. J.

Stephenson, T. ^{[1
]}

机构：

[1] Cranfield Univ, Sch Appl Sci, Cranfield MK43 0AL, Beds, England

[2] Tech Univ Berlin, Inst Verfahrenstech, D-10623 Berlin, Germany

[3] Thames Water Util Ltd, Reading RG2 0JN, Berks, England

来源：

WATER RESEARCH | 2007年 / 41卷 / 05期

关键词：

oxygen transfer; MBR; biomass; aeration;

D O I：

10.1016/j.watres.2006.10.020

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Ten biomass samples from both municipal and industrial pilot and full scale submerged membrane bioreactors (MBRs) with mixed liquor suspended solids concentrations (MLSS) ranging from 7.2 to 30.2 g L-1 were studied at six air-flow rates (0.7, 1.3, 2.3, 3, 4.4 and 6 m(3)m(-3)h(-1)). Statistical analyses were applied to identify the relative impacts of the various bulk biomass characteristics on oxygen transfer. Of the biomass characteristics studied, only solids concentration (correlated with viscosity), the carbohydrate fraction of the EPS (EPSC) and the chemical oxygen demand (COD) concentration of the SMP (SMPCOD) were found to affect the oxygen transfer parameters k(L)a(20) (the oxygen transfer coefficient) and a-factor. The relative influence on kLa20 was MLSS > aeration > EPS, > SMPCOD and on a-factor was MLSS > SMPCOD > EPSC > aeration. Both kLa20 and a-factor increased with increasing aeration and EPSc and decreased with increasing MLSS and SMPCOD- MLSS was found to be the main parameter controlling the oxygen transfer. (C) 2006 Elsevier Ltd. All rights reserved.

引用

页码：1038 / 1044

页数：7

共 23 条

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