不同填料曝气生物滤池处理生活污水效能研究

为了对比研究多金属复合填料和颗粒碳填料对曝气生物滤池(BAF)效能的影响,构建了多金属复合填料曝气生物滤池(A-BAF)和颗粒碳填料曝气生物滤池(B-BAF)处理生活污水的对比实验。结果表明,A-BAF的COD、NH3-N、TP去除率比B-BAF分别提升了5.61~13.09、5.92~8.86、3.87~9.68百分点。A-BAF对生活污水中污染物的去除效果更好,抗冲击负荷能力更强,运行稳定性更高,多金属复合填料对BAF效能的提升更显著。在A-BAF和B-BAF内,生活污水中的NH3-N降解效果均达到最高,其次是TP,最后是COD,且始终保持更高的NH3-N去除率。在A-BAF内,当水力停留时间分别达到4、6、7 h时,出水NH3-N、TP、COD质量浓度分别降至4.93、0.49、46.3 mg/L,达到GB 18918-2002的一级A标准。

Study on the Treatment Efficiency of Domestic Wastewater by Biological Aerated Filter with Different Fillers

In order to study the effect of polymetallic composite filler and granular carbon filler on the performance of biological aerated filter(BAF),a comparative experiment of domestic wastewater treatment by polymetallic composite filler biological aerated filter(A-BAF)and granular carbon filler biological aerated filter(B-BAF)were set up.The results showed that the removal rates of COD,NH3-N and TP by A-BAF were 5.61~13.09,5.92~8.86 and 3.87~9.68 percentage point higher than those of B-BAF,respectively.A-BAF had better removal effect of pollutants in domestic wastewater,stronger shock load ability,higher stability of operation,and the improvement of BAF efficiency by polymetallic composite filler was more significant.In A-BAF and B-BAF,the degradation efficiency of NH3-N in domestic wastewater reached the highest level,followed by TP and COD,and always maintained a higher NH3-N removal rate.In A-BAF,when the hydraulic retention time(HRT)reached 4 h,6 h and 7 h respectively,the mass concentration of NH3-N,TP and COD in effluent decreased to 4.93,0.49 and 46.3 mg/L,respectively,which met the first level A standard of GB 18918-2002.