一级生物除铁除锰滤池中锰砂表面成分分析

Composition Analysis on Surface of Manganese Sand in One-stage Process for Biological Iron and Manganese Removal Filter

将二级生物除铁除锰工艺改造成一级生物除铁除锰工艺,能够使出水水质达到国家标准,为了对其原理进行研究,采用X射线光电子能谱分析技术对稳定运行的滤池中锰砂表面成分进行了分析。结果表明,滤池80 cm处锰砂表面的锰氧化物浓度明显增加,而铁氧化物浓度没有明显增加,说明在贫氧状态和低Fe2+浓度下,锰离子是通过微生物的作用被氧化成高价态锰氧化物,从而使出水中锰浓度降低。模拟试验结果进一步表明,这种低浓度的Fe2+对于锰氧化菌的活性具有重要作用。

After changing the two-stage process for biological iron and manganese removal to one-stage process in After changing drinking the two-stage process for biological iron and manganese removal to onewater plant, the outflow quality can meet the national standard now. In order to study its principles, X-ray photoelectron spectroscopy technique was used to analyze the surface composition of manganese sand in the filter of the water plant. The results indicated that the concentration of manganese oxide on the surface of manganese sand at the depth of 80 cm in filter was significantly increased, however, the concentration of iron oxide did not increase significantly. The findings proved that in the condition of low oxygen and Fe^2＋ concentration, Mn^2＋ was oxidized to high-valence manganese oxide by microorganisms, by which the concentration of Mn^2＋ in the effluent was reduced. The results of laboratory simulation indicated that the low concentration of Fe^2＋ played an important role in the activity of the manganese-oxidizing bacteria for the removal of manganese.