蚯蚓生物滤池处理农村分散生活污水效果研究

Study on the removal efficiency of rural domestic sewage by vermifiltration

通过分析1-7月份蚯蚓生物滤池进出水水质情况,阐述蚯蚓生物滤池对农村分散生活污水处理效果。结果表明:蚯蚓生物滤池对BOD5、NH4+-N及CODcr有较好的去除效果,平均去除率分别为78.2%、77.8%与38.1%,且随着进水水质及温度的变化,其出水水质稳定,具有较强的抗冲击负荷能力;而对TN和TP的去除效果不明显,平均去除率分别为26.4%与24.3%,但其出水水质符合《城镇污水处理厂污染物排放标准》(GB18918-2002)的一级B排放标准。同时,分析了蚯蚓生物滤池对TN和TP去除效果不明显的原因,并提出了提高脱氮除磷效果的建议,为蚯蚓生物滤池在农村分散生活污水处理方面的推广指明了一定的方向。

Removal efficiency of rural domestic sewage by vermifiltration was studied by analyzing influent and effluent quality during the period from January to July. The results showed the vermifiltration had good removal efficiency on BOD5, NH4^＋-N and CODer, with the average removal rate of 76.2%, 77.8% and 38.1%, respectively. Vermifiltration had strong ability to against the load impact, and the effluent quality of which varied little with the change of influent quality and ambient temperature during the sampling period. The removal efficiency on TN and TP was not obvious, with the average removal rate of 25% and 24.3%, respectively, achieving the primary B discharging standard of ＂ Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant （GB18918-2002）＂ . Additionally, the analysis of insignificant removal efficiency of TN and TP in vermifiltration was carried out, and the idea of improving the removal efficiency of TN and TP was brought out. which demonstrate the direction for the widespread use of vermifiltration on the treatment of rural domestic sewage.