水田联动控制在面源污染防治工程中的研究

Research on paddy field linkage control in non-point source pollution prevention and control engineering

本文以解决崇明区米新村农业面源污染等问题为主要目标,通过建设多级生态拦截水田联动的示范项目,研究示范工程对农田退水中氮磷的去除效果。结果表明,该工程对总氮、总磷和氨氮的去除率分别达到了58.94%、82.65%、69.77%,经过处理后水质可稳定达到《地表水环境质量标准》(GB 3838—2002)的Ⅲ类及以上标准;污染物的去除效果前段呈降解速度较快,后段趋于平缓的趋势,整体上总氮、总磷和氨氮的去除呈现正相关。

This article aims to solve agricultural non-point source pollution in Mixin Village,Chongming district,and studies the effect of the demonstration project on the removal of nitrogen and phosphorus from farmland by building a multi-level ecological interception and paddy field linkage demonstration project.The results showed that the removal rate of total nitrogen,total phosphorus and ammonia nitrogen reached by the project reached 58.94%,82.65%,and 69.77%respectively.After treatment,the water quality can stably reach theⅢof"Surface Water Environmental Quality Standard"(GB 3838-2002)class and above standards;the removal effect of pollutants shows a faster degradation rate in the front stage,and tends to be flat in the later stage.The overall removal of total nitrogen,total phosphorus and ammonia nitrogen shows a positive correlation.