南方农业学报Journal of Southern Agriculture2016,47(6):911915 ISSN 20951191; CODEN NNXAAB
D0I:10.3969/j:issn.20951191.2016.06.911
3种常见水生植物对养殖废水中化学
需氧量的去除效果刘作云，彭忆兰，付美云(湖南环境生物职业技术学院，湖南衡阳421005)
http://www.nfnyxb.com
摘要：【目的]研究水生植物对养殖废水中化学需氧量(COD。)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、水胡芦、藓菜3种单一水生植物及芦苇一水葫芦组合、芦苇一菜组合分别置于人工模拟水中COD.的去除与净化效果。【结果]供试水生植物对养殖废水中COD.的去除和净化能力排序为：芦苇一水胡芦组合>芦苇一菜组合>水胡芦>菜>芦苇。培养15d后，3种水生植物对养殖废水中COD。的净化效率为43.8%~87.3%，而对照组为28.9%~66.4%。【结论芦弟、水胡芦及藓菜3种水生植物对低浓度养殖废水中COD。的去除效果较明显，对高浓度养殖废水中COD。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.效率。
关键词：化学需氧量（COD。)；水生植物；养殖废水；去除效果
中图分类号：X703.1
文献标志码：A
文章编号：2095-1191(2016)06-0911-05
Removaleffectsofthreeaquaticplantsonchemicaloxygen
demand(CODr)inlivestockbreedingwastewater
LIU Zuo-yun, PENG Yilan, FU Mei-yun
(Hunan Polytechnic of Environment and Biology, Hengyang, Hunan 421005, China)
Abstract : [Objective JThe ability of aquatic plants to remove chemical oxygen demand (COD.) 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% td 66.4%. [ConclusionJThe reed, water hyacinth and water spinach have great ability to remove and purify COD 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.
Key words: chemical oxygen demand(COD.) ; aquatic plants; livestock breeding wastewater; removal effect
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引言
【研究意义】养殖废水因其氨氮(NH-N）、总磷
收稿日期：2015-12-21
(TP）、化学需氧量(COD。)及悬浮物浓度高，容易给自然环境带来长期的、不可逆的影响，是目前广大农村
基金项目：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
完院长青年基金项目（Z2013-2）
作者简介：刘作云（1982-），主要从事农村环境保护研究工作，E-mail：64794068@qq-com