The use of sulfate-reducing bacteria (SRB) is a cost-effective route to treat sulfate- contaminated waters and precipitate metals. The isolation and characterization of a SRB strain from an AMD in a Brazilian tropical region site was carried out. With a moderately acidic pH (5.5), the C.1 strain began its growth and with continued growth, modified the pH accordingly. The strain under these conditions reduced sulfate at the same rate as an experiment performed using an initial pH of 7.0. The dsrB gene-based molecular approach was used for the characterization of this strain and its phylogenetic affiliation was similar to genus Desulfovibrio sp. The results show an SRB isolate with unexpected sulfate reducing capacity in moderately acidic conditions, bringing new possibilities for the treatment of AMD, as acid water would be neutralized to a mildly acidic condition.

中文翻译：

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一种硫酸盐还原细菌，在中等酸性条件下具有异常的生长能力。

减少硫酸盐的细菌（SRB）的使用是处理受硫酸盐污染的水和沉淀金属的经济有效途径。在巴西热带地区，从AMD分离并鉴定了SRB菌株。在中等酸性pH（5.5）下，C.1菌株开始生长，并且随着持续生长，相应地改变了pH。在这些条件下，菌株还原硫酸盐的速率与使用初始pH 7.0进行的实验相同。使用基于dsrB基因的分子方法表征了该菌株，其系统进化关系与Desulfovibrio sp属相似。结果表明，SRB分离物在中等酸性条件下具有意外的硫酸盐还原能力，为治疗AMD带来了新的可能，