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標題: | 地下流式人工溼地對都市污水淨化之成效 Investigation of Treatment of Domestic Wastewater by Constructed Subsurface Wetlands |
作者: | Yen-Chen Lai 賴衍臻 |
指導教授: | 張文亮 |
關鍵字: | 人工濕地,礫間接觸,生物膜, constructed wetland,gravel bed,biofilm, |
出版年 : | 2005 |
學位: | 碩士 |
摘要: | 鑒於台灣本土現地參數不足,本研究於自然環境中施作一人造濕地以處理都市污水,變換不同之操作方式求取最佳處理效果。於關渡取用舊貴子坑溪溪水,為接觸曝氣及地下礫間處理複合式人工濕地,主要之污染去除機制為生物膜對污染質之分解。
研究結果顯示,移除效果最為顯著之水力停留時間為1天,平均移除率為,懸浮性固體57.4%,氨態氮13.7%,生化需氧量29.8%,磷酸鹽1.6%。而懸浮性固體的入流濃度維持在20mg/L以下,氨態氮入流濃度5.5mg/L以上則會有明顯之去除效果。本研究結果對於磷酸鹽之去除沒有顯著之效果。地下流式人工濕地持續使用約120天之後,需將槽內水放空以清洗孔隙,乾濕交替的操作維護方式可維持較佳之污染去除效率。 The purpose of this study is the use of subsurface flow constructed wetlands to treat domestic wastewater near Kuei-tzu-keng stream. Biofilm decompose on the surface is the primary removal mechanism. The gravel bed subsurface constructed wetland was used to investigate the removal efficiencies of SS, NH4+-N, BOD5, and PO43-. Results showed the removal efficiency is optimum when HRT were 1day. The averages of removal rate of SS, NH4+-N, BOD5, and PO43- were 57.4﹪, 13.7﹪,29.8%, and 1.6﹪respectively. There was a significant correlation between removal efficiency and inflow concentration of SS, NH4+-N, and BOD5. However removal efficiency significant increase as the concentration was below 20mg/L in SS and 5.5mg/L in BOD5. Removal efficiency of phosphorus in this experiment is insignificant. To avoid clogging and anaerobic, the wetlands should dry after 120days treatment and lead to aeration for treatment. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/36549 |
全文授權: | 有償授權 |
顯示於系所單位: | 生物環境系統工程學系 |
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