天津市农村生活污水处理设施排放标准

Water Pollutants Discharge Standard of Rural Sewage Treatment Facilities in Tianjin

为强化农村基础设施建设,明显改善农村人居环境,加强对天津市行政区域内农村生活污水处理设施的排放控制和管理,充分考虑相关技术所能达到的污染控制水平,兼顾农村地区的经济承受能力和管理水平,提出了符合天津市现阶段农村的水污染物排放控制要求。明确标准适用于规模 【500 m3/d的农村生活污水处理设施,依据排水去向、受纳水体和处理设施规模进行标准分级,选取pH值、悬浮物、CODCr、氨氮、总氮、总磷和动植物油类7项控制指标,动植物油类仅针对含农家乐废水的处理设施执行。对比分析国内各省市标准限值,依据天津市实际情况合理确定了控制限值。为确保标准顺利实施,从监测要求、超标判定、规范设施运行维护和加强监督管理等角度提出了要求和建议。

Rural sewage is one of the important reasons of rural water pollution. To fast the construction of rural infrastructures and improve the rural living environment significantly, the discharge standard of water pollutants for rural sewage treatment facilities is proposed based on pollution control technologies, fiscal and management capacity. The standard is applicable to rural domestic sewage treatment facilities under 500 m3/d and classification is based on variations of drainage receiving water and treatment facility scale. We add pH, SS, CODCr, NH3-N, TN, TP and animal and vegetable oils as control indicators. It should be noted that animal and vegetable oils are suitable for treatment facilities containing catering wastewater. By comparing requirements and analyzing the standards of several provinces and cities in China, the reasonably control limits are determined according to the actual situation in Tianjin. To ensure the implementation of the rural sewage discharge standard smoothly, some suggestions, i.e. monitoring requirements, determining over standards, standing operation and maintenance of facilities and strengthening supervision and management, are put forward.