清江流域畜禽养殖污染负荷研究

发布时间：2018-04-08 23:04

本文选题：清江流域　切入点：畜禽养殖　出处：《环境污染与防治》2016年07期

【摘要】：根据2014年清江流域畜禽养殖数据,计算了清江流域耕地畜禽粪尿负荷量及等标排放量,并对各地区畜禽粪尿对耕地和水环境的污染现状进行风险评价。结果表明:(1)清江流域猪粪当量高达1 314.03×10~4 t,耕地畜禽粪尿负荷量为29.37t/hm~2,预警值为0.78。(2)2014年全流域进入水体的COD、BOD_5、TN、氨氮、TP的流失量分别为40 505.03、30 322.11、19 541.30、5 644.17、3 373.90t/a。(3)各县市中长阳县对水体污染的贡献最大,为14.95%,之后依次为宜都市、恩施市、利川市、巴东县、建始县、咸丰县、宣恩县、鹤峰县和五峰县,其对水体污染的贡献分别为14.24%、13.96%、11.65%、10.94%、10.40%、7.40%、6.97%、5.01%和4.48%。(4)各种污染物中对水体污染贡献最大的是TN,等标排放率为40.33%,之后依次为TP、氨氮、BOD_5和COD,等标排放率分别为34.81%、11.65%、10.43%、2.79%。(5)清江流域各类畜禽养殖中对水体污染最大的是生猪,生猪养殖对水体污染的贡献为56.19%;家禽养殖对水体污染最小,其贡献仅为3.68%。而TN和TP是清江流域水体污染的主要因子,而生猪养殖对TN和TP污染的贡献分别为55.28%和46.47%。
[Abstract]:Based on the data of livestock and poultry breeding in the Qingjiang River Basin in 2014, the load of livestock and poultry feces and urine and the equal standard discharge amount were calculated, and the risk assessment of the pollution status of livestock and poultry feces to cultivated land and water environment in various regions was carried out.Pollution is the biggest contributor.Yidu City, Enshi City, Lichuan City, Badong County, Jianshi County, Xianfeng County, Xuanen County, Hefeng County and Wufeng County,Live pigs are the most polluted in the water.The contribution of live pig breeding to water pollution was 56.19, and that of poultry was the least, which was only 3.68.TN and TP are the main factors of water pollution in Qingjiang River Basin, and the contribution of pig breeding to TN and TP pollution is 55.28% and 46.47% respectively.
【作者单位】：中南民族大学资源与环境学院湖北省重金属废水处理与回用工程技术研究中心;
【基金】：湖北省自然科学基金资助项目(No.2015CFC888) 中南民族大学中央高校基本科研业务资助项目(No.CZW15075、No.CZW15037)
【分类号】：X713

【相似文献】