进水位置和比例对多级生物接触氧化工艺的影响

Effect of position and proportion of influent on multistage biological contact oxidation process

以农村生活污水为研究对象,进行了现场多级生物接触氧化工艺试验,考察分段进水对污染物的去除效果,研究在最优工况下的氮素变化。结果表明:好氧段一与缺氧段一的最佳进水体积比为4∶1,COD、NH+4-N和TN的出水平均浓度分别为20.2,0.5和9 mg/L,平均去除率为91.93%、97.10%和64.27%。依靠好氧段的同步硝化反硝化过程和缺氧段的反硝化过程,出水TN稳定且能够达到地方一级A标准。

Taking rural domestic sewage as object,a multistage biological contact oxidation process test was carried out in the actual field to investigate the removal effect of subsection influent on contaminants and the variety of nitrogen under the optimal conditions.The results showed that the optimal ratio of influent volume of 1st aerobic section and 1st anoxic section was 4∶1,the average concentrations of COD,NH+4-N and TN were 20.2,0.5 and 9 mg/L respectively,and the average removal rates were 91.93%,97.10%and 64.27%.Dependent on simultaneous nitrification and denitrification in aerobic section and denitrification in anoxic section,concentration of TN of the effluent was stable and could reach first level A criteria of the local standards.