锰（Mn）对许多水务公司来说仍然是一个棘手的问题， 它在tap中的控制和发生尚不清楚，尤其是在 微生物的作用。化学和微生物的可能影响 研究了饮用水系统中锰氧化还原的影响因素 研究据报道，洪都拉斯特古西加尔巴和其他地方出现了严重的锰污染 因此，这座城市是本研究的选定地点之一。两杯水 美国东南部的处理厂也进行锰去除，并被选中 这项研究的地点。 从水处理厂和 特古西加尔巴配电系统。结果表明，颗粒物中的锰 与铁管相比，聚氯乙烯（PVC）容易脱落，导致严重的“黑色” “水”问题。证明微生物催化锰的可能性 从生物膜样品中回收循环、锰氧化和锰还原细菌 收集自三个水体的沉淀池和过滤池中的颗粒物 对污水处理厂进行了研究。 锰氧化菌和锰还原菌也从中获得 在特古西加尔巴配水系统中采集的水样。PVC生物膜 特古西加尔巴的管道、铁管和砂滤料悬挂并显示 能够氧化和还原锰。虽然锰氧化细菌是需氧的 锰还原菌为兼性厌氧菌，结果表明 两种细菌可能共存于同一生物膜中。因此，很可能 沉淀池、过滤池和分配系统中形成的生物膜 有助于饮用水中锰的释放。 这项研究表明，化学和微生物因素都会影响 饮用水分配系统中的锰循环。包括10个参考文献、图表。

Manganese (Mn) is still a troublesome problem for many water utilities, and its control and occurrence at the tap are not well understood, especially with regards to the role of microorganisms. The possible influence of chemical and microbiological factors on manganese oxidation and reduction in drinking water supply systems has been studied. Severe manganese contamination was reported in Tegucigalpa, Honduras and for this reason the city was one of the selected locations for this research. Two water treatment plants in the southeastern U.S. also perform Mn removal and were selected locations for this study. Water samples were collected from locations in the water treatment plant and distribution system of Tegucigalpa. The results indicated that manganese in particulate form was easily dislodged from polyvinyl chloride (PVC) compared to iron pipes leading to severe "black water" problems. To demonstrate the possibility of microbial-catalyzed manganese cycling, Mn-oxidizing and Mn-reducing bacteria were recovered from biofilm samples collected from particulates in the sedimentation and filtration basins of the three water treatment plants studied. Mn -oxidizing and -reducing bacteria were also obtained from water samples collected in the distribution system of Tegucigalpa. Biofilms from PVC pipe, iron pipe, and sand filter media from Tegucigalpa were suspended and shown capable of both Mn-oxidation and reduction. Although Mn-oxidizing bacteria are aerobic and Mn-reducing bacteria are facultative anaerobic, the obtained results suggest the possible coexistence of both types of bacteria in the same biofilm. Thus, it is likely that biofilms formed in the sedimentation basin, filtration basin and distribution system contribute to manganese release in drinking water. This study suggests that both chemical and microbiological factors affect manganese cycling in drinking water distribution systems. Includes 10 references, figures.