EFFICIENCY OF NITROGEN REMOVAL IN CONSTRUCTE DWETLAND:A SIMULATION STUDY IN THE WEST JINLIN，CHIN^A

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• 出版年：2004
• 作者：ZHANG Hu-Cheng；YU Mu-Qing；TIAN wei；Y U ban；FU You-Bao；WANG Xiao-Dong
• 单位1：The Northeast Institution of Geography Agricultural Ecology
• 出生年：1974
• 语种：中文
• 作者关键词：saline-alkali soil； constructed weiand；nitrogen；purification efficienc^y
• 起始页：309
• 总页数：5
• 经费资助：Northeast Institute of Geograpby AgriculturalEcology，CAS(KZCX3-SW-NA-13).
• 刊名：湿地科学
• 是否内版：否
• 刊频：季刊
• 创刊时间：2003
• 主办单位：中国科学院东北地理与农业生态研究所
• 主编：陈宜瑜
• 电子信箱：wetlands@ mail.neigae.ac.cn
• 卷：2
• 期：4

摘要

Plenty ofinoganic nitrogen in wastewatercan cause the eutrophication in water bodies, so it is an impor-tant task to remove nitrogen. Purification rolewas realized by absortion， filtration，depositon，evaporation，nitrifica-tion annd denitrification of microbes. Although the studies of Phragmites austrilis bed in the constructed wetland arepopular, the purification performances of constructed wetland filled by saline-alkalisoit substrate are lessreported. Inthe paper, the purification efficiency of nitrogen with Phragmites austrilis bed in the constructed wetland filled bysaline-alkali soil substrate was discussed through a simulation study. Results to date indicated that the first order plugflow model was adequate to describe the nitrogen removal. The experiment showed that the diminishing concentrationof TN, N0²-N, N0³-N, NH⁴-N were closely related to hydrological retention time (HRT)，the correlation coefficientwas R²=0.98499，R²=0.9911，R²=0.89407 and R²= 0.95459，respectively. According to the data，themostsuitable hydrological retention time (HRT) for this kind of constructed wetland should be determined to 4 days． In ad-dition, the experiment showed the purification efficiency of nitrogen has very broad range and drastic vibration，TN(17％-79%), NO₂-N (33％-98%),NO₃-N（13％-93%），NH₄^-N (28％-64%). The study will promote wet-land's design and operation procedures in large saline-alkaline soil areas.