生物接触氧化-蔬菜型人工湿地处理农村生活污水

Biological Contact Oxidation-Aquatic Vegetable Constructed Wetland for Rural Domestic Sewage Treatment

采用生物接触氧化+水生蔬菜型湿地一体化装置处理川渝地区某农村居民实际农村生活污水。结果表明,装置对COD、NH_4^+-N、TN的去除率分别达69.23～96.53%、95.9%～97.26%和73.6～93.07%。出水COD和NH_4^+-N、TN的质量浓度分别为5.02～49.98 mg/L和0.59～1.93、2.83～9.35 mg/L,均能稳定达到GB 18918-2002的一级A标准。装置对TP的去除率仅为10%～20%,可通过筛选吸附能力更强的基质或者组合基质等措施进一步提高污水中TP的去除效率。微生物生化系统和湿地系统的结合,大大减少了湿地堵塞的可能,同时水生蔬菜的种植,提高了农户使用的积极性。

Biological contact oxidation-aquatic vegetable constructed wetland integrated device was used to treat practical rural domestic sewage in Sichuan area. The results showed that the removal rates of COD, NH4+-N and TN were 69.23~96.53%, 95.9%~97.26% and 73.6~93.07% respectively. The mass concentration of COD, NH4+-N and TN in effluent were 5.02~49.98 mg/L, 0.59~1.93 mg/L and 2.83~9.35 mg/L, respectively, which could meet the first class A discharge standard of GB18918-2002. The removal efficiency of TP was only 10%~20%, which can be further improved by screening substrates or combined substrates with strong adsorption capacity. The combination of microbial biochemical system and wetland system greatly reduced the possibility of wetland congestion. Meanwhile, the planting of aquatic vegetables increased the enthusiasm of farmers to maintain the treatment device.