A2O-MBR 工艺处理城市污水作农业灌溉用水中试研究简

为开发一种污水再生利用于农田灌溉领域的新型技术，本实验以城市污水为研究对象，采用A²O-MBR工艺进行中试研究，并将系统出水水质与《农田灌溉水质标准（GB5084-2005）》的主要水质指标进行对比分析。结果表明，系统COD和BOD₅出水浓度范围分别为3.2~59.6 mg/L、1.0~7.6 mg/L，系统出水pH为7.16~7.54，悬浮物浓度几乎为0，上述指标均符合标准；TP、TN和氨氮的出水范围分别为0.03~0.79 mg/L、1.6~17.7 mg/L和0.8~10.3 mg/L。《农田灌溉水质标准》没有对上述3个指标提出具体要求，且少量的氮磷是植物生长的营养元素。该系统出水的主要水质指标符合标准要求。

Treatment of urban wastewater for agricultural irrigation by A2O-MBR

To develop a kind of new technology on wastewater reuse in irrigation areas, we used A²O-membrane bioreactor to conduct pilot study, and also did comparative analysis between the effluent water quality of membrane process and Water Quality Standard for Agricultural Irrigation(GB5084-2005). The result indicated that the effluent concentration ranges of COD,BOD₅ of the system were 3.2~59.6 mg/L,1.0~7.6 mg/L, respectively, the effluent pH was 7.16~7.54,and the effluent of SS was hardly 0, above index all followed the standard. The effluent concentration ranges of TP,TN,NH₃-N were 0.03~0.79 mg/L,1.6~17.7 mg/L and 0.8~10.3 mg/L, respectively. There is no limit on them in the standard, and small amounts of nitrogen and phosphorus are nutrient elements for plant growth.The main water quality objectives of the effluent in the system conform to the standard.