Effect of pH on anoxic sulfide oxidizing reactor performance

被引：40

作者：

Mahmood, Qaisar ^{[1
]}

Zheng, Ping ^{[1
]}

Hayat, Yousaf ^{[2
]}

Islam, Ejazul ^{[1
]}

Wu, Donglei ^{[1
]}

Ren-Cun, Jin ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Environm Engn, Hangzhou 310029, Peoples R China

[2] Zhejiang Univ, Inst Stat Genet & Bioinformat, Hangzhou 310029, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2008年 / 99卷 / 08期

关键词：

ASO reactor; anoxic sulfide biooxidation; anoxic nitrite removal; optimum pH; pH tolerance range;

D O I：

10.1016/j.biortech.2007.07.006

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The effects of pH on the performance of anoxic sulfide oxidizing (ASO) reactor were evaluated. Performance was investigated under various operational conditions at influent pH range of 4-11. At the influent pH of 7-7.5 during loading tests and HRT tests, the sulfide oxidation was partial. In general, the amount of sulfate formed decreased with the increasing sulfide and nitrite loadings. The bacterial communities in ASO reactors were more sensitive to acidic pH compared with alkaline pH, as nitrite and sulfide removal rates dropped significantly when exposed to acidic pH 3. High dissolved bisulfide ions, nitrite and excess of sulfate (> 300 mg/L) might have inhibited the sulfide oxidation under highly acidic and alkaline conditions in the ASO reactor. Based on sulfide and nitrite removal efficiencies, the ASO reactor can be operated in a wide range of pH, i.e. 5-11. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：3291 / 3296

页数：6

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