模拟生态沟渠中盘培牧草降解养猪场废水效应研究

Effects of Pasture Stripes in Simulative Ecological Ditch on Degradation of Pollutants in Piggery Wastewater

在营养液膜技术基础上构建了以盘培多花黑麦草为主要内容的模拟生态沟渠系统,来降解杭嘉湖区域某一养猪场废水。观测了废水中各污染物指标在经模拟生态沟渠运行后的降解效果。结果表明:该模拟生态沟渠对养猪场废水具有明显的降解效果。养猪场废水进入模拟生态沟渠系统,运行36d后,COD降解幅度达92.4%,TN降解幅度达60.6%,NH4-N降解幅度达88.9%,TP降解幅度为73.7%,SS降解幅度达88.9%。并且在开始18d内降解速度较快,后18d降解速度相对较慢。

Based on nutrient film technique,we have built up simulative ecological ditch system to degrade the piggery wastewater,which was mainly composed of Lolium multiflorum strips.The results showed that this ecological ditch system had significant effects of degrading the pollutants in piggery wastewater,and the removal rate of chemical oxygen demand（COD）,TN,NH4 N,TP and suspended solids（SS） was 92.4%,60.6%,88.9%,73.7% and 88.9% respectively after 36 days＇running of the simulative ecological ditch system.In the earlier period of system running,the water quality parameters above-mentioned decreased greatly,while in the later period of system running,the water quality parameters decreased relatively slowly.