Enhanced sulfate reduction with acidogenic sulfate-reducing bacteria
Resource
Journal of Hazardous Materials 154 (1-3): 1060-1065
Journal
Journal of Hazardous Materials
Journal Issue
154
Pages
1060-1065
Date Issued
2008
Date
2008
Author(s)
Abstract
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. © 2007 Elsevier B.V. All rights reserved.
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Type
journal article
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