3种生态化改造模拟沟渠系统净化农田退水的试验研究  

Study on Three Eco-reconstructed Ditch Systems for Purifying Farmland Drainage

作　　者：苑永魁 蔡飞翔 汪奇[1] 张肖剑 曹玉成[1] Yuan Yongkui(College of Environment and Resources,Zhejiang Agriculture and Forestry University,Hangzhou 311300,China)

机构地区：[1]浙江农林大学环境与资源学院

出　　处：《安徽农学通报》2020年第4期65-68,共4页Anhui Agricultural Science Bulletin

基　　金：浙江省重大科技专项重点社会发展项目(2015C03007);浙江省“三农六方”科技协作项目(CTZB-F170623LWZ-SNY1)

摘　　要：通过室内模拟试验,研究了3种生态化改造模拟沟渠系统对农田退水的净化效果。结果表明,整个试验周期内,A型(苦草+贝壳粉)、B型(苦草+火山石)和C型(金鱼藻+火山石)沟渠系统的TP表面去除负荷分别为25.85、23.49和23.83mg·d^-1·m^-2,NH3-N去除负荷分别达到114.47、117.63和116.96mg·d^-1·m^-2,COD去除负荷分别为1.782、1.783和1.785g·d^-1·m^-2;说明生态沟渠污染净化效率受沟渠植物种类和基质类型的影响较大。Concrete ditch was eco-constructed to study its process performances for purifying farmland drainage. For this purpose, a pilot-scale simulation study on three eco-constructed ditch systems differing in vegetation and substrate, noted as AD(Vallisneria natans+shell powder), BD(Vallisneria natans+volcanic rock)and CD(Ceratophyllum demersum L. +volcanic rock), was conducted to look at their pollutant removal performance. The AD, BD and CD were found to have a removal efficience of 25.85, 23.49 and 23.83 mg·d^-1·m^-2 for TP purification, and 114.47, 117.63 and 116.96 mg·d^-1·m^-2 for removal of ammonium nitrogen, respectively. The results indicated that the purifying capacities of eco-constructed ditch systems are affected by vegetation and the substrate as well.

关 键 词：硬质化沟渠 生态化改造 农田退水 污染去除效率 

分 类 号：S641.1[农业科学—蔬菜学]