摘要
浙江省杭嘉湖区域水网沟渠发达,是浙江省最大的粮食产区,化肥施用量较高,农业污染日渐严重。本研究采用不另外占用土地的、以盘培多花黑麦草和高羊茅牧草为主要内容的生态沟渠湿地来降解养猪场废水,并分析各项污染物指标在沟渠中的迁移变化。结果表明:多花黑麦草对养猪场废水中的总N、总P的降污能力都要强于高羊茅,对于沟渠水体中的增氧能力则弱于高羊茅。在铺设盘培牧草的600 m沟渠中,各种污染物指标在靠近污水入口处的300 m沟渠内降解速度较快,而在远离污水入口处的后300 m沟渠内变化幅度相对比较平缓。
Aiming at the severity of agricultural pollution in the fields and river channels resulted from the piggery wastewater of Hangjiahu district in Zhejiang province,the ecological ditches were constructed to purify the piggery wastewater flowing through the ditches,which were mainly composed of pasture stripes(Festuca arundinacea and Lolium multiflorum stripes).The changes in the contents of COD,SS,TN,TP and DO in piggery wastewater along the ditches were inspected.The results showed that the ditches treated with Lolium multiflorum stripes had stronger capability of adsorbing and degrading the pollutants in piggery wastewater than those treated with Festuca arundinacea stripes.In the 600 m ditches which were mainly composed of pasture stripes,the degradation velocity of pollutants in piggery wastewater flowing through the ditches near the entrance was greater than that far away from the entrance.
出处
《江西农业学报》
CAS
2010年第8期152-155,共4页
Acta Agriculturae Jiangxi
基金
浙江省水利厅科技专项资助项目(RCO910)
