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目的研究农村三格化粪池排出粪水的处理方法。方法在重庆市九龙坡区西彭镇宝华村选择10户农家,在其卫生厕所三格化粪池后新建第四格小型人工湿地处理池,并在第二格或第三格加挂半软性填料,3～6个月后检测第三格池粪水和第四格小型人工湿地处理池出水口水质,按GB18918-2002中《城镇污水处理厂污染物排放标准》规定指标和要求测定处理前后的水质,计算达标率和清除率,比较处理前的后效果。结果10户农家第四格小型人工湿地处理池出水口水质检测指标达到国家污水二级排放标准户数分别为CODcr8户;氨氮6户;总磷9户;总氮1户;总悬浮物7户;色度6户;pH值10户;粪大肠菌群值10户。各检测指标的清除率(%)分别为:CODcr57.0%～90.6%;氨氮74.7%～91.6%;总磷68.3%～96.9%;总氮35.2%～96.9%;总悬浮物43.0%～80.0%;色度4.9%～90.6%。结论新建第四格小型人工湿地处理池对三格化粪池后的粪水处理效果好。
Objective To study the treatment method of excrement water discharged from three septic tanks in rural areas. Methods Choosing 10 farmhouses in Baohua Village, Xipeng Town, Jiulongpo District, Chongqing, and constructing a fourth-type small-scale constructed wetland treatment pond in the third-grade septic tank of sanitary lavatories and adding semi-softness in the second or third grid Filler, 3 to 6 months after the detection of the third cell pond effluent and the fourth grid of small wetland treatment pond outlet water quality, according to GB18918-2002 “urban sewage treatment plant pollutant emission standards,” the provisions of the indicators and requirements before and after the determination Of water quality, calculate the compliance rate and clearance rate, compare the post-treatment effect. Results The number of households with the standard of water quality of the outlet of the fourth small scale constructed wetland for 10 wet labs meeting the national secondary effluent discharge standard was 8 for CODcr, 6 for ammonia nitrogen, 9 for total phosphorus, 1 for total nitrogen and 7 for total suspended solids ; 6 chroma; pH value 10 households; fecal coliform value 10 households. The removal rate (%) of each detection index is respectively from 57.0% to 90.6% of CODcr, from 74.7% to 91.6% of ammonia nitrogen, from 68.3% to 96.9% of total phosphorus, from 35.2% to 96.9% of total nitrogen, from 43.0% to 80.0% %; Chroma 4.9% ~ 90.6%. Conclusion The construction of the fourth small-scale constructed wetland treatment pond has a good effect on the treatment of manure after the three-compartment septic tank.