Acid mine drainage (AMD) is an environmental hazard in many parts of the world. Processes using sulfate reducing bacteria (SRB) have proven to be successful in teh treatment of metal contaminated water. Known SRB strains, however, are sensitive to the low pH of AMD. Therefore, we have isolated acidophilic/acidotolerant SRB strains from acidic sites and begun to study their potential for use in AMD remediation. In order to develop a simple and robust low-cost system for treatment of AMD, a biofilm reactor system was constructed. Three diffeent SRB consortia were tested (varous combinations of acidophilic and neutrophilic SRB) and three carbon and energy sources (lactic acid, glycerol and ethanol) were evaluated for their potential use. All three SRB-consortia reduced sulfate when challenged with acidic influent, at rates of about 0.3 g SO_4~(2-)/l*day.
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机译：酸性矿山排水（AMD）在世界许多地方都对环境构成危害。事实证明，使用硫酸盐还原细菌（SRB）的方法在处理金属污染水方面是成功的。但是，已知的SRB菌株对AMD的低pH值敏感。因此，我们从酸性位点分离了嗜酸/耐酸SRB菌株，并开始研究其在AMD修复中的潜力。为了开发一种用于治疗AMD的简单而强大的低成本系统，构建了生物膜反应器系统。测试了三个不同的SRB联盟（嗜酸和嗜中性SRB的各种组合），并评估了三个碳源和能源（乳酸，甘油和乙醇）的潜在用途。当被酸性进水攻击时，所有三个SRB财团均还原硫酸盐，速率约为0.3 g SO_4〜（2-）/ l *天。
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