沉水植物氧化塘对污水厂尾水深度净化效果与机制的小试论述.pdf

Lake Sci．(湖泊科学)，2010，22(4)：538-544 htp：／www．flakes．org．E—mail：jlakes@niglas．ae．en ◎2010 by Journal of如k Sciences 沉水植物氧化塘对污水厂尾水深度净化效果与机制的小试研究 赵安娜 ，冯慕华 ，郭 萧 ，柯 凡 ，潘继征 ，李文朝 (1：中国科学院南京地理与湖泊研究所，南京210008) (2：中国科学院研究生院，北京 100049) 摘 要：室外采用玻璃缸装置研究了抚仙湖常见的9种沉水植物氧化塘对澄江县污水厂尾水营养盐的去除效果及机制． 结果表明：氧化塘中沉水植物的光合作用导致水体较高的DO和 pH值，从而提高氧化塘总氮和总磷的去除率，但沉水植 物叶片的腐烂分解则提高了水体氮磷的含量．沉水植物氧化塘对总氮和总磷的去除率分别介于 19．44％一64．71％和 28．13％一98．33％．沉水植物的直接吸收对总氮和总磷量去除的贡献比较低，占氧化塘总氮和总磷量的0．26％一1．54％和 0．47％一1．77％．沉水植物氧化塘内 DO、pH变化，促进了氮的降解及氧化还原分解，使其对氮的去除占氧化塘总氮量的 3O．71％一65．25％，而磷的去除则主要通过化学沉淀及基质吸附，占氧化塘总磷量的73，37％一93．34％．最终 ，选出蓖齿眼 子菜、苦草、黑藻、金鱼藻和光叶眼子菜对氧化塘中氮磷具有较高的去除率． 关键词：沉水植物氧化塘；尾水；氮 ；磷；抚仙湖 Experimental study on tail water purification of wastewater plant with submerged macro— phyte oxidation ponds ZHAO Anna 一，FENG Muhua ，Gun Xiao 一，KE Fan ，PAN Jizheng LI Wenchao (1：StateKeyLaboratory of 妇Science andEnvironment，NanjingInstitute ofGeography andLimnology，ChineseAcademy of Sciences，Nanjing 210008， 尼China) (2：Graduate School ofChinese Academy ofSciences，BeOing 100049，P．R．China) Abstract：In the field of the wastewater plant in ChenNiang County，an experiment was caried out to investigate the efect and mechanism of nutrient removal in oxidation ponds which were planted by nine submerged macrophyte．The result showed that，pho— tosynthesis of submerged nmemphytes in oxidation ponds induced the high level of water DO and pH which increased the removal efects of TN and TP，but the decomposition of submerged maerophyte leaves enhanced the content of TN and TP in the submerged maerophyte oxidation ponds．The removal rates of TN and TP in the ponds are 19．44％ 一64．71％ and 28．13％ 一98．33％ respec— tively．And the contributions of direct absorption by submerged macrophytes are low，which removed 0．26％ 一1．54％ of TN and 0．47％ 一1．77％ of TP in the oxidation ponds．The change of DO and pH have promoted nitrogen degradation and redox decomposi- tion．which removed 30．71％ 一65．25％ ofTN and 73．37％ 一93．34％，whilethe removalTPwasmainly byways of chemi