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題 名 | 關渡人工礫床礫間接觸工程設計參數與水質處理成效關係分析=Relationship between Engineering Design Parameters and Water Quality for Constructed Cobble Bed in Guandu |
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作 者 | 游進裕; 曹晴薇; 林宗岳; 陳建志; | 書刊名 | 環境保護 |
卷 期 | 29:2 民95.12 |
頁 次 | 頁73-90 |
分類號 | 445.25 |
關鍵詞 | 自然淨化; 人工礫床; 礫間接觸; Natural purification; Constructed cobble bed; Cobble contact treatment; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究以國內首座利用礫間接觸工法處理舊貴子坑溪之污水,於關渡自然公園內舊貴子坑溪旁,所設置之人工礫床試驗處理場為案例,探討礫間接觸之工法特性、工程設計參數、水質處理成效以及設計注意事項等。該處理區面積約為400平方公尺,以天然卵礫石為材料(礫石尺寸為15cm~20cm),利用礫石表面上之生物膜,將水中有機營養物質消耗與分解,透過接觸沉澱、吸附、氧化分解等作用,以達淨化水質之功效。人工礫床之礫石主要採人工堆疊排列,故槽內空隙率在水深0.4m時有最小之孔隙率0.31,隨水深高度增加,孔隙率也隨之增高至0.42,而當水深低於0.4m時,孔隙率也會升高至0.364。經近540天之運轉操作下,且每月定期排空清淤,以致其平均移除率為生化需氧量46%,懸浮固體71%,氨氮24%。日平均移除量以SS為最佳,平均為911g/day;BOD其次,平均為542.8g/day;NH4(上标 +)平均為313.8g/day。SS污染移除率在水力停留時間15-20小時其效果較佳,BOD則在水力停留時間13-17小時其效果較佳,而NH4(上标 +)則在水力停留時間10-15小時其效果較佳。BOD之平均一階反應係數為1.4231(day^(-1)),NH4(上标 +)則為0.6132(day^(-1))。人工礫床採用馬達引水,故運轉時需要電力,單位入流量之耗能量約為0.1077KwH/立方公尺,其單位電能對於BOD、SS及NH 之移除量分別為53.87g/KwH、71.23g/KwH 及37.13g/KwH。 |
英文摘要 | In Taipei Guandu Natural Park, the first Constructed Cobble Bed (CCB) treatment site applied with cobble contact treatment method was built in Taiwan to clean up Jiuguizikeng Creek's heavily polluted water. In this paper CCB engineering design parameters and water quality monitoring results were presented and correlated. This CCB treatment area was about 400 m^2 and was filled up with natural cobbles, particle size ranging from 15 cm to 20 cm. Biofilm grown on the surface of cobbles can consume aquatic organic nourishment material to improve water quality. Cobbles in CCB were mainly artificially rearranged to control the porosity. Minimum porosity of 0.31 was produced at the 0.4m water depth for this CCB. When increasing the water depth, the porosity becomes more up to 0.42. While water depth descending, the porosity gets up to 0.364 as well. After nearly 540 days running, including monthly drain-up operation, the averages of removal rate of BOD, SS and NH4(superscript +) were 46%, 71%, and 24% respectively. Daily average removal for SS was 911 g/day, 542.8 g/day for BOD, and 313.8 g/day for NH4(superscript +). The hydraulic retention time (HRT) for better removal of SS was 15-20 hours, 13-17 hours for BOD, and 10-15 hours for NH4(superscript +). The first order reacting coefficient, kv, of BOD was calculated as 1.4231 (day-1) and 0.6132 (day-1) for NH4(superscript +). CCB in Guandu required electricity to pump up water into the treatment site. The consumption of power for unit inflow loading was about 0.1077 KwH/m^3. Thus the removal of BOD, SS and NH4(superscript +) by unit power were 53.87g/KwH, 71.23g/KwH, and 37.13g/KwH respectively. |
本系統中英文摘要資訊取自各篇刊載內容。