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引用本文:纪荣平,吕锡武,李先宁.人工介质对富营养化水体中氮磷营养物质去除特性研究.湖泊科学,2007,19(1):39-45. DOI:10.18307/2007.0106
JI Rongping,LU Xiwu,LI Xianning.Performance of artificial medium for removing nutrients in eutrophic water. J. Lake Sci.2007,19(1):39-45. DOI:10.18307/2007.0106
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人工介质对富营养化水体中氮磷营养物质去除特性研究
纪荣平1,2, 吕锡武1, 李先宁1
1.东南大学环境科学与工程系, 南京210096;2.扬州大学环境科学与工程学院, 扬州225009
摘要:
采用人工介质富集微生物对太湖梅梁湾水源水中氮磷营养物质的去除特性进行了试验研究.中试结果表明:随着介质密度和水力停留时间的增加, 对氮磷营养物质的去除率均有提高.介质密度为26.8%、水力停留时间为5d时, 人工介质对TN、TP、氨氮、亚硝态氮的去除率分别为26.6%、72.1%、43.2%、79.4%, 可见人工介质对富营养化水体中氮磷营养物质有较好的去除效果.增加水流速度消除了池内的溶解氧和氧化还原电位的分层现象, 提高了NH4+-N和NO2-N的去除效果, 没有降低TP、PO43--P、DTP的去除效果, 说明沉淀作用并不是去除水体中氮磷营养物质的主要途径.人工介质表面富集了大量的微生物, 通过硝化-反硝化作用是富营养化水体水质改善的主要途径.
关键词:  人工介质  氮磷营养物质  富营养化水体  水质改善
DOI:10.18307/2007.0106
分类号:
基金项目:国家高技术研究发展计划(863)项目(2002AA601011-03);江苏省科学技术厅项目(BS2004050);江苏省环境保护专项资金项目(苏财建2005-80-7)联合资助.
Performance of artificial medium for removing nutrients in eutrophic water
JI Rongping1,2, LU Xiwu1, LI Xianning1
1.Department of Environmental Science & Engineering, Southeast University, Nanjing 210096, P.R.China;2.College of Environmental Science & Engineering, Yangzhou University, Yangzhou 225009, P.R.China
Abstract:
Pilot test was made for the removal of nutrients in eutrophic source water through the use of enriched microbes by artificial medium.The results indicated that the nutrient elements removal efficiency enhanced as the medium density and hydraulic retention time (HRT) increased.The removal rates of total nitrogen (TN), total phosphorus (TP), ammoniacal nitrogen, nitrite nitrogen were 26.6%, 72.1%, 43.2% and 79.4% respectively under the medium density of 26.8% and HRT of 5d.It is evident that enriched microbes on the artificial medium can effectively remove the nutrient elements in the eutrophic source water.Because of increasing the water velocity, the delimination phenomena of the dissolved oxygen (DO) is lowered and oxidation-reduction potential (ORP) is eliminated.The removal ratio of ammonia nitrogen, nitrite nitrogen was enhanced slightly whereas the elimination effect of TP, phosphate, dissolved total nitrogen (DTN) did not.So the sedimentation isn't the main approach of nutrient elements removal in source water.The large quantity of microbes is enriched on the surface of artificial medium.The nitrification and denitrification is one of the main mechanisms for water quality improvement in eutrophic water.
Key words:  Artificial medium  nutrient elements  eutrophic water  water quality improvement
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