SBR中煤粉粒径对模拟生活污水处理效果的影响

Effect of pulverized coal particle size on simulated domestic sewage treatment in SBR

针对污水处理提质增效和污泥处置难的问题,通过向SBR反应器中投加煤粉,构建了煤粉活性污泥系统,研究了煤粉粒径分别为0.280~0.180、0.180~0.154、0.154~0.125、0.125~0.106及<0.106 mm条件下SBR反应器的处理效果。结果表明,在煤粉投加量为0.4 g/L的条件下,COD、氨氮、总氮、总磷出水浓度均可达到《城镇污水处理厂污染物排放标准》一级A排放标准。综合考察处理效果和经济因素,选用粒径0.154~0.125 mm的煤粉投加污水处理系统较为合适。此条件下,COD、氨氮、总氮和总磷的平均去除率分别是92.96%、91.71%、70.13%和97.41%,平均出水浓度分别为29.29、3.39、12.77、0.20 mg/L。

For improving the quality and efficiency of sewage treatment and sludge disposal,pulverized coal activated sludge system was constructed by adding pulverized coal powder into sequencing batch reactor(SBR).The treatment of SBR reactor was studied under pulverized coal particle size of 0.280-0.180,0.180-0.154,0.154-0.125,0.125-0.106 mm and less than 0.106 mm.Results show that the effluent concentrations of COD,ammonia nitrogen,total nitrogen and total phosphorus meet the Level A emission standard of Discharge standard of pollutants for municipal wastewater treatment plant under the pulverized coal dosage of 0.4 g/L.From the treatment effect and economic factors,it is more appropriate to add pulverized coal with particle size of 0.154-0.125 mm into sewage treatment.Under this condition,the average removal rate of COD,ammonia nitrogen,total nitrogen and total phosphorus was 92.96%,91.71%,70.13%and 97.41%,respectively.The average effluent concentrations of COD,ammonia nitrogen,total nitrogen and total phosphorus were 29.29,3.39,12.77 and 0.20 mg/L,respectively.