Distribution and mass transfer of dissolved oxygen in a multi-habitat membrane bioreactor

被引：19

作者：

Tang, Bing ^{[1
]}

Qiu, Bing ^{[1
]}

Huang, Shaosong ^{[1
]}

Yang, Kanghua ^{[1
]}

Bin, Liying ^{[1
]}

Fu, Fenglian ^{[1
]}

Yang, Huiwen ^{[1
]}

机构：

[1] Guangdong Univ Technol, Sch Environm Sci & Engn, Guangzhou 510006, Guangdong, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2015年 / 182卷

基金：

中国国家自然科学基金;

关键词：

Membrane bioreactor; Multi-habitat; Mass transfer; Dissolved oxygen; MICROBIAL COMMUNITY; WASTE-WATER;

D O I：

10.1016/j.biortech.2015.02.028

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This work investigated the DO distribution and the factors influencing the mass transfer of DO in a multihabitat membrane bioreactor. Through the continuous measurements of an on-line automatic system, the timely DO values at different zones in the bioreactor were obtained, which gave a detailed description to the distribution of oxygen within the bioreactor. The results indicated that the growth of biomass had an important influence on the distribution of oxygen. As the extension of operational time, the volumetric oxygen mass transfer coefficient (k(L)a) was generally decreased. With the difference in DO values, a complex environment combining anoxic and oxic state was produced within a single bioreactor, which provided a fundamental guarantee for the total removal of TN. Aeration rate, the concentration and apparent viscosity of MLSS have different influences on k(L)a, but adjusting the viscosity is a feasible method to improve the mass transfer of oxygen in the bioreactor. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：323 / 328

页数：6

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