复合装置处理农田废水效果分析

Treatment effect of a complex set for agricultural wastewater

为了处理桂林市西郊绿色观光农业示范区的农田废水，改善农田区域地表水的水质，设计了一套生物滤池-木炭吸附池相结合的复合装置，将其设于农田总排污口处的沟渠中，用于处理废水中的NH4^＋-N、TP、TN、SS．该装置运行6个月，结果表明：对NH^4＋-N的平均去除率为60％，对TP、TN的去除率分别为20％～90％、20％～40％，对SS的去除率为40％～70％．该装置运行成本低、对农田废水净化具有良好效果。

In order to improve the surface water quality of the sightseeing farming area in the western suburs of Guilin city, the agricultural wastewater should be treated effectively. A complex set combined with a biological filter and a charcoal adsorption pool was designed and built in the farm drainage to remove NH^4＋-N, TP, TN and SS of the agricultural wastewater. Six months operation indicated that the mean removal rates of NH^4＋-N, TP, TN and SS are 60%, 20%～90%, 20%～40% and 40%～70%, respectively. The set can treat the agricultural wastewater with high efficiency and low run cost.