3种常见水生植物对养殖废水中化学需氧量的去除效果  

Removal effects of three aquatic plants on chemical oxygen demand(COD_(cr))in livestock breeding wastewater

作　　者：刘作云[1] 彭忆兰[1] 付美云[1] 

机构地区：[1]湖南环境生物职业技术学院,湖南衡阳421005

出　　处：《南方农业学报》2016年第6期911-915,共5页Journal of Southern Agriculture

基　　金：湖南省林业科技创新计划项目(XLK201339);衡阳市科学技术局科技计划项目(2009ks24);湖南环境生物职业技术学院院长青年基金项目(Z2013-2)

摘　　要：【目的】研究水生植物对养殖废水中化学需氧量（COD_（cr））的去除能力,为人工湿地系统处理养殖废水提供理论依据。【方法】将芦苇、水葫芦、蕹菜3种单一水生植物及芦苇—水葫芦组合、芦苇—蕹菜组合分别置于人工模拟的不同浓度养殖废水中培养,以不种植水生植物的不同浓度养殖废水为对照,对比分析芦苇、水葫芦、蕹菜对养殖废水中COD_（cr）的去除与净化效果。【结果】供试水生植物对养殖废水中COD_（cr）的去除和净化能力排序为：芦苇—水葫芦组合〉芦苇—蕹菜组合〉水葫芦〉蕹菜〉芦苇。培养15 d后,3种水生植物对养殖废水中COD_（cr）的净化效率为43.8%～87.3%,而对照组为28.9%～66.4%。【结论】芦苇、水葫芦及蕹菜3种水生植物对低浓度养殖废水中COD_（cr）的去除效果较明显,对高浓度养殖废水中COD_（cr）的处理效果一般,在构建人工湿地植物系统时结合实际情况组建合适的植物组合,可提高净化COD_（cr）效率。[Objective ]The ability of aquatic plants to remove chemical oxygen ciemand （CODσ） from livestock breed- ing wastewater was investigated, in order to provide theoretical basis for treating livestock breeding wastewater with ar- tificial wetland system. [ Method ]The reed, water hyacinth and water spinach, combination of reed and water hyacinth, combination of reed and water spinach was cultivated in artificial simulated breeding wastewaters with different concentra- tions, respectively, compared with different concentrations of livestock breeding wastewaters without planting aquatic plants. And the removing and purifying effects of reed, water hyacinth and water spinach on COD~ in livestock breeding wastewater were analyzed comparatively. [ Result ]The results showed that, three aquatic plants were ordered based on their abilities to remove and purify COD~ in livestock breeding wastewater, as follow： combination of reed and water hyacinth〉 combination of reed and water spinach〉water hyacinth〉water spinach〉reed. After 15 days of culture, the removal rates of COD~ for three aquatic plants ranged from 43.8% to 87.3%, while the removal rate for control ranged from 28.9% to 66.4%. [Conclusion]The reed, water hyacinth and water spinach have great ability to remove and purify CODσ in livestock breeding wastewater with a low concentration, while they have ordinary ability in breeding wastewater with a high concen- tration. Therefore, while building the artificial wetland plant system, plants should be combined properly to improve their removal effect according to actual situation.

关 键 词：化学需氧量(CODcr) 水生植物 养殖废水 去除效果 

分 类 号：X703.1[环境科学与工程—环境工程]