人工湿地中细菌污水处理能力的初步研究

目的]在人工湿地中筛选出一些具有潜在应用价值的细菌种类。方法]于春、夏两季共从北京地区的人工湿地中分离并纯化出菌落形态有较大差异的细菌26株。通过测定这26株细菌对生活污水中的有机物、总氮、总磷的去除能力,筛选出一些具有良好应用前景的菌株。结果]26株细菌中有9株细菌具有较好的有机物去除能力(去除率大于30%),其中对有机物去除能力最强的细菌为X7,去除率达64.62%;有9株细菌具有较好的总氮去除能力,其中X25和X26细菌除氮能力最强,去除率均达90%以上;仅有X7细菌具有较好的总磷去除能力,去除率为32.25%。结论]夏季生长的细菌去除总氮的能力更强,细菌对总氮的去除效果随时间延长而增加。

Primary Study on Ability of wastewater Treatment of Bacteria in Constructed Wetland

Objective] The purpose was to screen out some bacteria species with potential application value in constructed wetland.Method] 26 strains of bacteria with bigger difference on colonial morphology were separated and purified from the constructed wetland in Beijing area in spring and autumn and some strains with good application foreground were screened out through determining the ability on removing the organic matter,total nitrogen and phosphor in living wastewater.Result] Among 26 strains of bacteria,9 strains of bacteria had good removal ability to organic matter with the removal rate of 30 %,in which X7 had the strongest removal ability to organic matter with the removal rate of 64.623 0 %;9 strains of bacteria had good removal ability to total nitrogen in which X25 and X26 had the strongest removal ability to total nitrogen with the removal rate of over 90 %;only X7 had good removal ability to total phosphor with the removal rate of 32.25 %.Conclusion] The removal ability to total nitrogen of bacteria grown in summer was stronger.The effect of bacteria on removing total nitrogen increases with the time prolonging.