温室大棚污水灌溉土地处理复合系统示范应用研究

Demonstration of Combining Wastewater Land Treatment with Irrigated Poly-house Crops

基于污水灌溉土地处理复合系统具备的水力负荷较大、污染物去除效果明显等特点,将其与温室大棚作物灌溉相结合,建立起相应的示范应用工程构造型式与运行管理模式,开展工程去污效果的应用研究与工程投资和效益分析。研究结果表明,采用将污水灌溉土地处理复合系统与温室大棚作物灌溉相结合的方式,不仅可获得良好的污水处理效果,还能获得不低于常规灌溉的相应作物产量,且对油菜作物品质没有产生不良影响。污水灌溉土地处理复合系统在温室大棚灌溉中的应用在经济上具有可行性。

Combining wastewater land treatment with crop irrigation, wastewater irrigation is characterized with effective pollutant removal and efficient water resources utilization. However, its application is limited by its low hydraulic load and cold winter temperature in northern China, where the soil is often frozen during the winter season. Amelioration to the traditional wastewater irrigation system is conducted by adding a controllable drainage system in it, and applies to poly-house system to combine domestic wastewater treatment with irrigated poly house crops. Trial and demonstration results show that pollutant removal of the combined system is effective, and crop yields match the conventional irrigation system, with non negative impact on the quality of the irrigated vegetables. Cost effect analysis shows that the combined system is cost effective.