结合AAO工艺的微动力技术处理农村生活污水工程设计实例

Engineering design example of rural domestic sewage treatment by AAO process combined with micro-power technology

云南省某行政村处于水源保护地,污水主要为淋浴、冲厕、厨房洗涤、洗衣及其他生活污水。针对该污水水量较小,可生化性好,悬浮物浓度较高等特点,设计采用结合微动力技术的AAO工艺+人工湿地深度处理。工程运行结果表明:出水CODCr、BOD5、SS、NH3-N、TN、TP的平均质量浓度分别为42.6、10.8、8.5、6.6、12.7、0.6mg/L,出水水质能稳定达到GB18918—2002《城镇污水处理厂污染物排放标准》中一级B排放标准。介绍了该处理工艺的流程及特点,给出了主要构筑物设计参数及投资运行成本。

A village in Yunnan province is located in water source protection area, which the sewage is mainly from shower, toilet flushing, kitchen washing, laundry and some other scenes of life. According to the characteristics of the said sewage such as small quantity, good biodegradability, high SS concentration, and so on, AAO process combined with micro-power technology and constructed wetland was adopted for the project design. The running results of the project showed that, the average mass concentrations of CODCr, BOD5, SS, NH3-N, TN, TP in effluent water were 42.6, 10.8, 8.5, 6.6, 12.7 and 0.6 mg/L respectively, which indicated that the effluent water quality stably met the requirement of grade 1 level B in GB 18918-2002 Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant. The flow and characteristics of the said process were introduced, besides, the design parameters of the main structures as well as the investment and operation costs were provided.