影响CASS工艺处理煤矿生活污水水质的因素

Factors affecting the quality of domestic sewage of coal mine treated by CASS process

以显德汪矿工业广场污水处理厂为例,依据日常管理模式和运行经验,阐述了该厂的污水来源和水质构成,CASS工艺的运行方式,以及在运行过程中影响CASS工艺处理水质的因素。影响因素主要包括pH值、水温、原水成分、污泥负荷Ns、溶解氧DO、污泥浓度MLSS、30 min沉降比SV30、污泥指数SVI和回流比。通过对各参数的调整,确定出了一套适合本污水厂运行的最佳参数,其中溶解氧、水温、回流比及排泥量的控制尤为重要。

Taking Xiandewang coal mine industrial square sewage treatment plant as an example,according to daily management mode and operation experience,the source of sewage and the composition of water quality,the operation mode of CASS process,and the factors affecting the treated water quality of CASS process during operation process were described.The influencing factors mainly include pH value,water temperature,raw water composition,sludge load Ns,dissolved oxygen DO,sludge concentration MLSS,30 min settlement ratio SV30,sludge index SVI and reflux ratio.By adjusting various parameters,a set of optimal parameters suitable for the operation of the sewage plant was determined,in which the control of dissolved oxygen,water temperature,reflux ratio and sludge discharge is particularly important.