化学物质对硝化细菌的选择性抑制

针对硝化反应中2类细菌对环境的敏感程度不同,可由此使硝化反应第2步受到抑制,产生亚硝酸盐的积聚,即短程硝化反应;将引起亚硝酸盐积聚的原因分为2种,相应地将化学物质对生物硝化反应的抑制作用分为2类,将这些可产生选择性抑制作用的化学物质进一步分为无机氮化合物、毒性物质和杀菌类物质.综合分析已有的研究结果,着重讨论了消毒剂作为选择性抑制剂的可行性.从安全性、投加剂量及投加频次等角度分析,认为消毒剂作为选择性抑制剂有很好的应用前景.

Selective Inhibition on Nitrification by Chemicals

In traditional biological nitrogen removal process, nitrification can be divided into two steps, which are performed by two separated bacteria. The sensibilities of the two bacteria to the environment are different. The second step of nitrification is easy to be inhibited, which result in accumulation of nitrite defined as shortcut nitrification. In this paper, two reasons of the nitrite accumulation was classified, correspondingly the chemicals to inhibit the nitrification process can be defined as two kinds. The chemicals which can lead to the inhibitions was sorted in three categories: inorganic nitrogen compounds, toxic materials and disinfectants. After analyzing the current research results, the feasibility of the disinfectants application was focused on. Conclusion was made based on the analysis of safety, dose and dose frequency that is feasible to use disinfectants as selective inhibitors for the shortcut nitrification.