库尔勒市氧化塘工艺处理效果及相应改进措施

Treatment efficiency and improvable techniques of oxidation pond processes in Korla City

以新疆库尔勒城区某氧化塘为研究对象,分析氧化塘对COD、BOD5、NH3-N、TN和TP的处理效果。结果表明:2009年,该氧化塘对COD、BOD5、NH3-N、TN和TP最高去除率分别为72.2%、67.1%、12.1%、14.5%和39.3%。针对2006—2010年该氧化塘系统进水中主要污染物质量浓度逐年上升,出水中主要污染物质量浓度也随之上升,且水质随季节变化波动较大,冬季出水部分水质指标不能确保达标,氧化塘内积累了大量污泥,经常发生底质恶化的现象,建议增加污水预处理设施,改进现行氧化塘处理工艺,冬季增加保温措施等,以提高氧化塘污水处理效果,改善氧化塘出水水质。

The removal rates of COD,BOD5,NH3-N,TN,and TP through oxidation pond treatment were investigated in an oxidation pond in Korla City,in Xinjiang.The results show that the highest removal rates of COD,BOD5,NH3-N,TN,and TP in the oxidation pond system were 72.2%,67.1%,12.1%,14.5%,and 39.3%,respectively,in 2009.Statistics show that the influent concentrations of the pollutants increased gradually from 2006 to 2010.Correspondingly,the effluent concentrations of the pollutants were higher than before.In addition,seasonal fluctuation was detected in the effluent,and part of the indices of the effluent in winter could not satisfy the discharge standard.Field research shows that sediment deterioration occurred frequently due to massive accumulated sludge in the oxidation pond.It is suggested that techniques such as adding pre-treatment facilities,strengthening the existing process of oxidation ponds,and enhancing heat preservation in winter should be utilized to improve the treatment efficiency and effluent quality.