Performance of artificial medium for removing nutrients in eutrophic water
Performance of artificial medium for removing nutrients in eutrophic water
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DOI：
10.18307/2007.0106
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
Jiang Rongping;Lv Xiwu;Liu Xianning
中科院分区：
文献类型：
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作者：
Jiang Rongping;Lv Xiwu;Liu Xianning
采用人工介质富集微生物对富营养化水源水中营养盐的去除进行了中试研究，结果表明，随着介质密度和水力停留时间的增加，营养盐的去除率提高，对总氮（TN）、总磷（TP）、氨氮、亚硝酸盐氮的去除率分别为26.6%、72.1%、72.1%、72.1%。在填料密度为26.8%、水力停留时间为5d的条件下，去除率分别为43.2%和79.4%，说明人工填料上富集的微生物能有效去除富营养化水源水中的营养元素。溶解氧（DO）的测定现象降低，氧化还原电位（ORP）消除，氨氮、亚硝酸盐氮的去除率略有提高，而TP、磷酸盐、溶解性总氮（DTN）不存在，因此沉淀不是去除水源水营养元素的主要途径，人工介质表面富集了大量微生物，微生物的存在是去除水源水营养元素的主要途径。硝化和反硝化作用是富营养化水体水质改善的主要机制之一。
Pilot test was made for the removal of nutrients in eutrophic source water through the use of enriched mi- crobes by artificial medium.The results indicated that the nutrient elements removal efficiency enhanced as the me- dium density and hydraulic retention time(HRT)increased.The removal rates of total nitrogen(TN),total phos- phorus(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 ef- fectively remove the nutrient elements in the eutrophic source water.Because of increasing the water velocity,the detimination phenomena of the dissolved oxygen(DO)is lowered and oxidation-reduction potential(ORP)is elim- inated.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 nutri- ent elements removal in source water.The large quantity of microbes is enriched on the surface of artificial medi- um.The nitrification and denitrification is one of the main mechanisms for water quality improvement in eutrophic water.