Toxicity Reduction of Municipal Wastewater by Anaerobic-anoxic-oxic Process

被引:0
作者
MAN-HONG HUANG #
+ College of Environmental Science and Engineering
机构
基金
美国国家科学基金会; 高等学校博士学科点专项科研基金; 中央高校基本科研业务费专项资金资助;
关键词
A2/O process; Municipal wastewater; Toxicity reduction; Process optimization; Toxic-shock loading;
D O I
暂无
中图分类号
X703 [废水的处理与利用];
学科分类号
083002 ;
摘要
Objective This study was conducted to optimize the operational parameters of anaerobic-anoxic-oxic (A2/O) processes to reduce the toxicity of municipal wastewater and evaluate its ability to reduce toxicity.Methods A luminescent bacterium toxicity bioassay was employed to assess the toxicity of influent and effluent of each reactor in the A2/O system.Results The optimum operational parameters for toxicity reduction were as follows:anaerobic hydraulic retention time (HRT)=2.8 h,anoxic HRT=2.8 h,aerobic HRT=6.9 h,sludge retention time (SRT)=15 days and internal recycle ratio (IRR)=100%.An important toxicity reduction (%) was observed in the optimized A2/O process,even when the toluene concentration of the influent was 120.7 mg·L-1.Conclusions The toxicity of municipal wastewater was reduced significantly during the A2/O process.A2/O process can be used for toxicity reduction of municipal wastewater under toxic-shock loading.
引用
收藏
页码:481 / 486
页数:6
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