| 3种常见水生植物对养殖废水中化学需氧量的去除效果 |
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| 引用本文： | 刘作云,彭忆兰,付美云.3种常见水生植物对养殖废水中化学需氧量的去除效果[J].南方农业学报,2016(6):911-915. |
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| 作者姓名： | 刘作云 彭忆兰 付美云 |
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| 作者单位： | 湖南环境生物职业技术学院,湖南 衡阳,421005 |
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| 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院院长青年基金项目(Z2013-2) |
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| 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。
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| 关 键 词： | 化学需氧量(CODcr) 水生植物 养殖废水 去除效果 |
Removal effects of three aquatic plants on chemical oxygen demand(CODcr) in livestock breeding wastewater |
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| Abstract: | Objective]The ability of aquatic plants to remove chemical oxygen demand (CODcr) 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 CODcr 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 CODcr 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 CODcr 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 CODcr 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. |
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| Keywords: | chemical oxygen demand(CODcr) aquatic plants livestock breeding wastewater removal effect |
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