Electron donors for biological sulfate reduction

被引:433
作者
Liamleam, Warounsak [1 ]
Annachhatre, Ajit P. [1 ]
机构
[1] Asian Inst Technol, Pathum Thani 12120, Thailand
关键词
biological sulfate reduction; sulfate reducing bacteria; anaerobic treatment;
D O I
10.1016/j.biotechadv.2007.05.002
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Biological sulfate reduction is widely used for treating sulfate-containing wastewaters from industries such as mining, tannery, pulp and paper, and textiles. In biological reduction, sulfate is converted to hydrogen sulfide as the end product. The process is, therefore, ideally suited for treating metal-containing wastewater from which heavy metals are simultaneously removed through the formation of metal sulfides. Metal sulfide precipitates are more stable than metal hydroxides that are sensitive to pH change. Theoretically, conversion of I mol of sulfate requires 0.67 met of chemical oxygen demand or electron donors. Sulfate rich wastewaters are usually deficient in electron donors and require external addition of electron donors in order to achieve complete sulfate reduction. This paper reviews various electron donors employed in biological sulfate reduction. Widely used electron donors include hydrogen, methanol, ethanol, acetate, lactate, propionate, butyrate, sugar, and molasses. The selection criteria for suitable electron donors are discussed. (C) 2007 Elsevier Inc. All rights reserved.
引用
收藏
页码:452 / 463
页数:12
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