改性粉煤灰强化A^2／O-DMBR处理农村生活污水

Study on Rural Domestic Wastewater Treatment by Adding Modified Fly Ash in A^2/O-DMBR

通过2组平行对比实验,重点考察改性粉煤灰对A^2/O-动态膜生物反应器处理农村生活污水的影响,并进行相关性分析。结果表明,投加改性粉煤灰对农村生活污水的脱氮除磷有强化作用,可以实现COD、TP、TN和NH4+-N的同步去除,比不投加改性粉煤灰去除率分别提高8.54个、22.1个、4.64个、4.87个百分点,出水污染物含量达到GB18918-2002的一级A标准;投加改性粉煤灰与TN、NH_4^+-N去除率的相关系数有显著性,与COD、TP去除率的相关系数有高度显著性。可为农村生活污水处理的工程实践提供参考。

The effect of modified fly ash on the treatment of rural domestic wastewater by A^2/O dynamic membrane bio-reactor was studied by two parallel experiments, and the correlation analysis was made. The results showed that adding modified fly ash could increase the removal of nitrogen and phosphorus in rural domestic sewage, and achieve the simultaneous removal of COD, TP, TN and NH4^＋-N. Compared with modified fly ash not being added, the removal rates were increasedby 8.54 percent points, 22.1 percent points, 4.64 percent points, and 4.87 percent points, respectively, and the effluent index reached the first grade, standard A, according to the GB 18918--2002. The correlation coefficient of modified fly ash and the removal rates of TN and NH4^＋-N had statistical significance, and that of removal rates of COD and TP had high statistical significance, which can be served as the reference for wastewater treatment in countryside.