摘要
随着污水处理厂排放标准的日趋严格,反硝化滤池以其多功能性被越来越广泛的应用于污水厂的提标改造中。通过对某城市污水厂反硝化滤池的运行研究,实践了在冬季低水温条件下的快速启动,并对滤池进水温度、DO、碳源投加量对脱氮效果的影响做了分析。结果表明,反硝化滤池在冬季水温较低的情况下也可以较为快速的启动,启动周期约为2d;在进水温度低于17℃后,总氮去除率会受到较大影响;滤池的进出水DO会直接影响缺氧环境,从而影响总氮去除效果;碳源投加量与总氮去除率呈现正相关性,且未对出水COD产生明显影响。
With the increasingly strict discharge standards of wastewater treatment plants(WWTPs),denitrification filters(DF)are more and more widely used in the upgrading of WWTPs due to its versatility.In this paper,through the study of the operation of DF in a municipal WWTP,the rapid start-up under low water temperature conditions in winter was carried out,and the effect of the inlet water temperature,dissolved oxygen(DO)and the dosage of external carbon source on the DF were analyzed.The results showed that the DF could be started relatively quickly in the low water temperature conditions in winter,and the start-up period was about 2 days.When the inlet water temperature was lower than 17°C,the total nitrogen(TN)removal efficiency was greatly affected.The DO concentration in the inlet and outlet water of the DF directly affecedt the anoxic environment,thus the TN removal efficiency was affected.The dosage of external carbon source was positively related to the TN removal efficiency,and has no significant effect on the chemical oxygen demand(COD)of the outlet water.
作者
刘凯
张苇杰
桂智银
李金泽
LIU Kai;ZHANG Wei-jie;GUI Zhi-yin;LI Jin-ze(Chengdu Drainage CO.Ltd,Chengdu 610000,China)
出处
《四川环境》
2019年第6期26-29,共4页
Sichuan Environment
关键词
反硝化滤池
快速启动
总氮去除
DO
碳源投加
温度
Denitrification filter
rapid start-up
total nitrogen removal
dissolved oxygen
dosage of external carbon source
temperature
