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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/6174

    標題: 感潮人工濕地之水力特性、植物組成及污染物降解研究
    Hydraulic Characteristics, Aquatic Composition and Pollutant Degradation of Tidal Freshwater Constructed Wetland
    作者: 黃士哲
    Shi-che Huang
    貢獻者: 林健榮
    關鍵字: 感潮人工濕地
    Tidal Freshwater Constructed Wetland
    Aquatic Composition
    Hydraulic Characteristics
    Pollutant Degradation
    日期: 2005
    上傳時間: 2008-10-31 16:15:56 (UTC+8)
    摘要: 本研究主要探討感潮水域人工溼地於海水入侵後,其污染物降解去除受鹽度效應之影響,為能瞭解不同鹽度條件下,其降解效能之變化,本研究同時操作鹽度為0.5%、1.0%、2.0%之人工溼地系統,另有淡水之對照組系統,而每組系統均包括表面流動式溼地與潛流式溼地,其中分別植栽香蒲與蘆葦。本研究之污染物類型主要溶解性之有機污染物,含氮污染物與含磷污染物。
    This research mainly investigated the degradation characteristics of the tidal freshwater constructed wetland. In order to understand the change of degradation efficacy in different conditions of salinity, this research was operated by the artificial wetland systems of 0.5%、1.0% and 2.0% in salinity at the same time and has a control system of fresh water. Every group system included a surface-flow wetland and a subsurface-flow wetland which planted separately of the cattail and reed. The types of pollutant in this research are mainly dissolvent pollutants of organics、nitrogen and phosphorus.
    In order to precisely understand the characteristic of the whole constructed wetland, each system carries on a hydraulic characteristics test before starting. The results show that the difference in temperature of in flows causes the FWS unit presented a completely mixed state, and the effective volume ratio is up to 0.99. The constructed wetland that had been operated for 8 months represented the rise in the density of plant and could cause effective volume ratio dropped to 0.56~0.66. The characteristic of completely mixed state reduced. After the systematic characteristic of every artificial wetland was steady in this research;The inflow sewage was spiked with sodium chloride to simulate the saline environment. On the system, of 2% salinity the cattail had withered within two weeks, thereafter the reed also showed a similar phenomenon. But, the response of the other salt systems was comparatively gentle and less in quantity in death of plant. Through analyzing the content of C , N , H , S , Cl of these deathful plant, it was found that the sulphur and the chlorine of the root increased largely, and then caused the death of the plant.
    The rate of degradation of BOD5 in the system of 2.0% salinity became decreased largely after beening invaded by the salt water. It was only 24.6% of the control group. Also drop as for B and C system, only the course was comparatively slow. It dropped to the lowest about 5-7 weeks. Thereafter the degradation rate became the control group. It shows that all there is a downward trend as for its K20. In addition, the degradation rate of the ammonia nitrogen and nitrate had not been obviously influenced by salinity the K20 of SSF unit increased as the salinity reduced. The degradation of pollutant contained the phosphorus had not influenced by temperature change. It only leaded the degradation rate dropped by salinity effect.
    關聯: 校內校外均不公開
    Appears in Collections:[環境工程與科學系(所)] 博碩士論文

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