Enhanced sulfate reduction with acidogenic sulfate-reducing bacteria

被引：51
作者：
Wang, Aijie [2 ]
Ren, Nanqi [2 ]
Wang, Xu [2 ]
Lee, Duujong [1 ,2 ]
机构：
[1] Natl Taiwan Univ, Dept Chem Engn, Taipei 10617, Taiwan
[2] Harbin Inst Technol, Sch Municipal & Environm Engn, Harbin 150090, Peoples R China
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2008年 / 154卷 / 1-3期
基金：
中国国家自然科学基金;
关键词：
sulfate-reducing; COD/SO42-; ratio; acetate; metabolism;
D O I：
10.1016/j.jhazmat.2007.11.022
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Sulfate reduction in a continuous flow, acidogenic reactor using molasses wastewater as the carbon source was studied at varying chemical oxygen demand/sulfate (COD/SO42-) ratios. At a critical COD/SO42- ratio of 2.7, neither COD nor sulfate were in excess for extra production of ethanol or acetate in the reactor. An acetic-type microbial metabolism was established with sulfate-reducing bacteria (SRB) significantly consuming hydrogen and volatile fatty acids produced by acidogenic bacteria and hydrogen producing acetogens in degrading COD, thereby yielding sulfate removal rate >94.6%. A low critical COD/SO42- ratio of 1.6 was also observed with the enriched ASRB population in reactor which overcomes the barrier to the treatment capability of sulfate-laden wastewater treatment with limited COD supply. (c) 2007 Elsevier B.V. All rights reserved.
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页码：1060 / 1065
页数：6
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