Lead removal through biological sulfate reduction process

被引：52

作者：

Hoa, Tran Thi Hien ^{[1
]}

Liamleam, Warounsak ^{[1
]}

Annachhatre, Ajit P. ^{[1
]}

机构：

[1] Asian Inst Technol, Klongluang 12120, Pathumthani, Thailand

来源：

BIORESOURCE TECHNOLOGY | 2007年 / 98卷 / 13期

关键词：

sulfate reduction; UASB process; COD : S ratio; electron flow; lead sulfide precipitation;

D O I：

10.1016/j.biortech.2006.09.060

中图分类号：

S2 [农业工程];

学科分类号：

0828 [农业工程];

摘要：

The feasibility of lead removal through biological sulfate reduction process with ethanol as electron donor was investigated. Sulfide-rich effluent from biological process was used to remove lead as lead sulfide precipitate. The experiments were divided into two stages; Stage I startup and operation of sulfidogenic process in a UASB reactor and Stage II lead sulfide precipitation. In Stage 1, the COD:S ratio was gradually reduced from 15:1 to 2:1. At the COD:S ratio of 2:1, sulfidogenic condition was achieved as identified by 80-85% of electron flow by sulfate reducing bacteria (SRB). COD and sulfate removal efficiency were approximately 78% and 50%, respectively. In Stage II, the effluent from UASB reactor containing sulfide in the range of 30-56 mg/L and lead-containing solution of 45-50 mg/L were fed continuously into the precipitation chamber in which the optimum pH for lead sulfide precipitation of 7.5-8.5 was maintained. It was found that lead removal of 85-95% was attained. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：2538 / 2548

页数：11

共 23 条

[1]

Biological sulfate reduction using molasses as a carbon source [J].