A novel, obligately anaerobic, acidophilic bacterium (strain I2511), isolated from sediment in an abandoned copper mine, was shown to couple the oxidation of organic electron donors to the reduction of both zero-valent sulfur and ferric iron in acidic media. The isolate was an obligate heterotroph that used a variety of organic compounds as electron donors and required yeast extract for growth. Alternative electron acceptors (sulfate, tetrathionate, thiosulfate and nitrate) were not used by the novel isolate. The strain grew as motile, endospore-forming rods, and was mesophilic and moderately acidophilic, with a growth rate of 0.01 h⁻¹ at optimum pH (3.7) and temperature (35 °C). Analysis of its 16S rRNA gene sequence placed strain I2511 within the phylum Firmicutes, distantly related to validated species. Phylogenetic analysis and physiological traits indicate that the novel strain represents a species of a candidate novel genus. Strain I2511 was included in a microbial consortium in a low pH “hybrid” sulfidogenic bioreactor designed to remove chalcophilic metals from metal-contaminated liquors and was present in >50% relative abundance when bioreactor was operated at pH ∼ 2.0. Results indicate that the novel isolate could be applied in biotechnologies to treat acidic and neutral pH, metal-rich effluents.

从废弃的铜矿中的沉积物中分离出的一种新型的专性厌氧嗜酸细菌（菌株I2511）可将有机电子给体的氧化与酸性介质中零价硫和三价铁的还原结合。该分离物是专性异养菌，其使用多种有机化合物作为电子供体，并需要酵母提取物才能生长。该新型分离物未使用其他电子受体（硫酸根，四硫根，硫代硫酸根和硝酸根）。该菌株生长为能运动的，形成内生孢子的杆，并且是中温和中度嗜酸的， 在最佳pH（3.7）和温度（35°C）下的生长速率为0.01 h ^-1。分析其16S rRNA基因序列，并将菌株I2511置于门扇菌门内，与经过验证的物种密切相关。系统发育分析和生理特征表明，该新菌株代表候选新属的一个物种。I2511菌株包含在低pH“混合”硫化生物反应器中的微生物联盟中，该反应器旨在从金属污染的液体中去除嗜酸性金属，并且当生物反应器在pH〜2.0下运行时，其相对丰度> 50％。结果表明，该新型分离物可用于生物技术中，以处理酸性和中性pH值，富含金属的废水。