- 學位論文
非點源削減技術-多槽處理設施之試驗研究
Non pollution source reduction technology- Multi-Chambered Treatment Train
摘要
近年來，最佳管理措施(Best Managemant Practices,BMPs)已成為國內處理非點源污染及水質管理之重要手段。本研究沿用行政院環保署之非點源削減試驗計劃之場址與數據，並後續增加3場暴雨資料，藉此評估多槽處裡設施(MCTT)在本土之適用性。本研究場址設置於坪林行控中心內，主要收集其建築物屋頂及停車場之暴雨逕流，本MCTT場址自96年5月完工啟用，共操作8個月收集9場暴雨資料，經利用濃度去除率法估算MCTT對各種污染物之平均去除效率，分別為，SS：72％、COD：44％、大腸桿菌：51%、氨氮：47%、TP：54％、鉛：52％、銅：40%、鋅：75％，油脂：62%；另外由於過濾槽使用泥炭，釋出色度，因此出流水的色度增加了59％，但經過二個月操作後已無色度釋出。 此外，本研究利用統計之相關係數來檢視污染物之去除率與降雨強度及總降雨量之關係。計算結果，油脂與降雨強度呈現負高度相關，其餘皆為低或無相關，再經統計之t檢定其相關係數之顯著性，結果顯示僅油脂與降雨強度之負高度相關為顯著，其餘去除率之相關係數均不顯著。 本研究與阿拉巴馬州大學校園示範MCTT之數據針對全系統、沉澱槽及過濾槽作一比較，在全系統方面，去除效率尚稱良好，尤其以氨氮較為突出，其他皆與阿拉巴馬大學校園示範型 MCTT相當；在沉澱槽方面，去除效率除COD外，其餘皆相近；而在過濾槽方面，去除效率普遍較阿拉巴馬大學之示範型MCTT為好。
並列摘要
In recent years, the best management practices (BMPs) have become the major means of managing the non-point source pollution and the water quality of receving water bodies This research extends the MCTT’s pilot project supported by the Environmental Protection Agency and three additional storm events were added to further assess the local applicability of the MCTT’s, located in Pinglin traffic control center. The stormwater runoff came mainly from the structure’s roof and a parking area. The MCTT site had successfully collected nine storm events during eight- month operation since the completion of the MCTT in May, 2007. And the removal efficiencies of the individual pollutants were calculated by the Removal Rate (RR) method. The results showed that the removal efficiencies of the individual pollutants were as follows: SS: 72%, COD: 44%, E. coli: 51%, ammonia: 47%, TP: 54 %, Lead: 52%, copper: 40%, zinc: 75%, oil: 62%; and, the outflow colour increased 59% due to the use of peat in filtering chamber. However, the colour faded away after two-month operation. In addition, this study used the correlation coefficient to investigate the relationship between the removal of pollutants with the rainfall intensity and the total rainfall depth. The results showed that the oil removal rate presented high negative correlation with the rainfall intensity, but other removal rates were either low or no correlate with respect to rainfall intensity or total rainfall depth. Those correlation coefficients were further tested by the t-tests and the results showed that the high negative correlation between oil removal rate and the rainfall intensity was significant, but other correlation coefficients were not significant. On the comparison of local MCTT with that installed in Alabama campus, the overall removal efficiencies were somewhat equivalent for both systems, but the local MCTT showed better removal for the NH3-N’s. With respect to the individual chamber, the Alabama’s MCTT showed better removal for the COD’s in its settling chamber, but the local MCTT presented better removal than that of the Alabama’s case in their filtering chamber.