Influence of the agitation rate on the treatment of partially soluble wastewater in anaerobic sequencing batch biofilm reactor

被引：32

作者：

Pinho, SC

Ratusznei, SM

Rodrigues, JAD

Foresti, E

Zaiat, M

机构：

[1] IMT, Dept Engn Quim & Alimentos, Escola Engn Maua, Sao Paulo, Brazil

[2] USP, EESC, Dept Hidraul & Saneamento, BR-13566590 Sao Paulo, Brazil

来源：

WATER RESEARCH | 2004年 / 38卷 / 19期

基金：

巴西圣保罗研究基金会;

关键词：

anaerobic process; anaerobic sequencing batch reactor (ASBR); anaerobic sequencing batch biofilm reactor (ASBBR); mechanical agitation; partially soluble wastewater; particulate organic matter;

D O I：

10.1016/j.watres.2004.08.015

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This work reports on the influence of the agitation rate on the organic matter degradation in an anaerobic sequencing batch reactor, containing biomass immobilized on 3 cm cubic polyurethane matrices, stirred mechanically and fed with partially soluble soymilk substrate with mean chemical oxygen demand (COD) of 974 +/- 70mg l(-1). Hydrodynamic studies informed on the homogenization time under agitagion rates from 500 to 1100 rpm provided by three propeller impellers. It occurred very quickly compared to the total cycle time. The results showed that agitation provided good mixing and improved the overall organic matter consumption rates. A modified first-order kinetic model represented adequately the data in the entire range of agitation rate. The apparent first-order kinetic constant for suspended COD rose approximately 360% when the agitation rate was changed from 500 to 900 rpm, whereas the apparent first-order kinetic constant for soluble COD did not vary significantly. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：4117 / 4124

页数：8

共 24 条

[1]

APHA/AWWA/WEF , 1998, STAND METH EX WAT WA

[2] Treatment of low-strength wastewater using immobilized biomass in a sequencing batch external loop reactor: Influence of the medium superficial velocity on the stability and performance [J].