UBF反应器COD去除率下降原因分析和解决措施

摘要

In view of the fact that,the CODCr removal efficiency of UBF reactor,the main process of PTA wastewater treatment,decreased continuously.The influencing factors includes:activity of anaerobic sludge system in UBF reactor,wastewater retention time,accumulation of heavy metals,and ρ(VFA)/ρ(CODCr) value in the influent water,were analyzed.And then,some relevant solving measures from aspects of monitoring pre-estima-tion,operation control,process modification,and so on,were put forward.By the end of 2012,the removal rates of CODCr in all UBF reactors were recovered to above 80％.The practice showed that,all the mentioned measures were targeted,essential and effective.%针对PTA废水处理主体工艺中UBF反应器CODCr的去除率不断下降的问题,从UBF反应器的厌氧污泥活性、废水停留时间、重金属积累、进水ρ(VFA)/ρ(CODCr)值等方面进行原因分析,并从监测预判、运行控制、工艺改进等方面提出解决措施.截至2012年底所有UBF反应器CODCr的去除率均已恢复至80％以上.实践证明,各种解决措施具有针对性并且效果显著.