MBR的DO分布及其对污染物去除的影响

DO Distribution and Its Influence on Pollutant Removal in MBR

为研究MBR中的DO分布及其对出水水质的影响而进行了生产性试验,结果表明:MBR内的DO值较低且分布不均匀,不能满足有机物降解和氨氮硝化的需要,因此造成反应器内有机物的累积和出水氨氮偏高。在此基础上,探讨了MBR内DO的分布与MBR技术参数的关系,提出了设计时应当注意的问题以及避免DO分布不均匀的措施。

The influence of dissolved oxygen (DO) distribution on effluent quality in a full-scale MBR was studied.The result shows that the DO in MBR is at low level and its distribution is uneven,which can not meet the demand of organics degradation and nitrification.Thus,the accumulation of organic matters in MBR and high ammonia nitrogen level in effluent occur.Based on the above results,the correlation between the DO distribution and the technical parameters of MBR was discussed.Several problems were put forward for consideration during the design of MBR,and measures were suggested to avoid the uneven distribution of DO in MBR.