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不同生态工程组合系统对南方水源地污水的净化效果

DOI: 10.3724/SP.J.1145.2012.00635, PP. 635-641

Keywords: 生态工程,组合,污水处理,浮游植物,生态修复

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Abstract:

于2010年6月(丰水期)和11月(枯水期),对我国南方水源地农村生活污水处理系统(系统ⅰ)以及农田排水处理系统(系统ⅱ)的常规污染物和藻类进行调查,分析比较两个系统对常规污染物以及藻类的去除效果.结果表明,系统ⅰ出水中的生化需氧量、化学耗氧量、总磷、总氮和悬浮物等指标均符合《国家城镇污水处理厂污染物排放标准》(gb18918-2002)回用水要求,该系统中共监测出浮游植物6门53属74种,系统ⅰ丰水期对藻类细胞总密度和叶绿素a的去除率分别为87.71%和58.87%,枯水期为95.73%和58.57%;系统ⅱ出水中的生化需氧量、化学耗氧量、总磷、总氮和氨氮等指标优于《地表水环境质量标准》(gb3838-2002)ⅳ类水标准,该系统监测出浮游植物6门48属66种,系统ⅱ丰水期对藻类细胞总密度和叶绿素a的去除率分别为62.43%和72.25%,系统ⅱ丰水期的藻类处理效果优于枯水期.对两个系统的水质净化效果进行比较,系统ⅰ对总氮、藻类细胞密度、叶绿素a的去除效果优于系统ⅱ,系统ⅱ对氨氮的去除效果优于系统ⅰ.两种生态工程组合系统的水质净化效果明显,能为南方类似水源地污水处理和水生生态态系统恢复提供技术支持.图3表2参33

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