循环氧化塘消减富营养化指标新技术研究
2014-10-21胡双修郑轩胡飞跃万喜宗雷克亮卢亚霞
胡双修 郑轩 胡飞跃 万喜宗 雷克亮 卢亚霞
摘要 用循环氧化塘新技术治理三峡大学求索溪景观河流,探讨了新工艺设计构思、氧化塘参数、停留时间、运行效果、运行成本、生态效益。结果表明:出水主要污染物化学需氧量、氨氮、总磷指标均符合《人工湿地污水处理工程技术规范(HJ2005-2010)》进水质要求;运行成本低;生态效益显著。主要污染物总消减率均值:化学需氧量为89.6%,总氮为76.4%,总磷为67.8%。
关键词 循环氧化塘;消减;富营养化;新技术
中图分类号 S181.3 文献标识码
A 文章编号 0517-6611(2014)31-11058-04
Research on New Technology of Treatment of River Eutrophication with Cyclic Oxidation Pond
HU Shuangxiu1,ZHENG Xuan2,HU Feiyue2,LU Yaxia3* et al (1.College of Biology and Pharmacy,Three Gorges University,Yichang,Hubei 443002; 2.Environmental Protection Bureau of Macheng,Macheng,Hubei 438300; 3.College of Science and Technology,Three Gorges University,Yichang,Hubei 443002)
Abstract Cyclic oxidation pond was applied to treatment of Qiusuo River eutrophication polluted by domestic sewage in Three Gorges University.The ideas of new design,parameters of oxidation pond,during time of running water in all oxidation pond,effect of operating,operating cost and ecological effect were all discussed.The results showed that the concentrations of COD,TN and TP in treated water in outflow met the demand for “Technical specification of constructed wetlands for wastewater treatment engineering” (HJ2005-2010) and that operating cost was low and ecological effect was obvious.The average removal rate of COD was 89.6%,TN 76.4% and TP 67.8%.
Key words Cyclic oxidation pond; Treatment; Eutrophication; New technology
湖泊、水庫等封闭缓流水体的富营养化已成为一个全球性的水环境污染问题,全球约有75%以上的封闭缓流水体存在富营养化问题[1]。我国湖泊众多,共有2 759个1 km2以上湖泊,总面积达91 019 km2,占国土面积的 0.95%。自20世纪80年代以来,我国由于人口剧增、农业迅猛发展、工业化和城市化进程加快,使得大量营养元素(N、P 等)及有机物排入湖泊、水库、河流中,氮、磷营养盐严重富集,引起藻类及其他浮游生物迅速繁殖,水体溶氧量下降,鱼类及其他生物大量死亡,水质恶化,缓流的湖泊、水库、河流富营养化呈现快速发展的趋势[2-5]。2013年环境保护部对我国重要58 个湖(库)开展营养状态监测,结果发现中度富营养的3个,占 5.2%;轻度富营养的10个,占 17.2%;中营养和贫营养的 45 个,占 77.6%,主要污染指标为化学需氧量、总磷和氨氮[6]。在五大淡水湖中,太湖、洪泽湖、巢湖已达富营养程度,鄱阳湖、洞庭湖目前虽维持中营养水平,但磷、氮含量偏高,正处于向富营养过渡阶段。……
