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年度	105	專案性質	實驗性質
專案類別	研究專案	研究主題	整治
申請機構	國立臺灣大學	申請系所	生物環境系統工程學系
專案主持人	范正成	職等/職稱	教授
專案中文名稱	利用滲透灌注技術進行基質最佳稀釋比例於地下水生物整治之應用研究
中文關鍵字	滲透灌注技術,基質最佳稀釋比例,地下水生物整治
專案英文名稱	Application of the Most Appropriate Dilution Ratio of the Substrates Using the Permeation Injection Technique to Groundwater Bioremediation
英文關鍵字	Permeation Injection Technique,the Most Appropriate Dilution Ratio of the Substrates,Groundwater Bioremediation
執行金額	1,100,000元
執行期間	2015/11/17 至 2016/11/16
計畫中文摘要	現地生物整治法係為現今常被應用於地下水受含氯有機物污染之整治方式。此法常利用重力流方式，使其自然沈降並擴散，但此種方式不易確認基質是否能有效的滲透且均勻的散佈於欲整治範圍。 爰此，本計畫應用大地工程中常用於土壤改良之滲透灌漿技術，進行基質注入技術之研究試驗，針對基質注入砂柱試體滲透性及持續時間等指標，評估不同土層條件下之各種基質適用性。 本年度計畫可分為二部分，第一部分改變基質HRC之稀釋比例，探討其在砂柱試體中之滲透性與持續性，期望能提出該基質適用稀釋比例之建議；第二部分針對極細砂試體進行滲透灌注之試驗，期望能提出適用之基質之建議。 由第一部分的試驗結果發現，稀釋比例之改變能改善基質滲透之情形，在A砂試體(D50=0.45mm)、B砂試體(D50=0.30mm)及細砂試體(D50=0.23mm)中，提高HRC之稀釋比例至1:20可以灌注到目標高度。 第二部分的極細砂試體試驗，研究發現以滲透灌漿之技術無論是EOS、HRC或是EcoClean皆無法於C砂(D50=0.01mm)及D砂(D50=0.05mm)中滲透，而在E砂(D50=0.25mm)、F砂(D50=0.27mm)中，HRC、EOS及EcoClean三種基質僅可分別滲透至分別約為50及60公分；持續性方面在E砂即F砂中則分別高達90%及70%。 緣此，稀釋比例之改變可以改善無法有效滲透之現象。極細砂部分，HRC之滲透性最佳，持續性部分三者皆差不多。針對滲透性較差的土壤，未來則建議朝向提高稀釋比例、增加灌注壓力等方向努力，以改善滲透不佳之情形。
計畫英文摘要	ndwater polluted by chlorinated organic compounds. To inject the substrates into groundwater, the method by gravity flow is commonly used, so that the substrates or nutrients are injected, and then they will settle and diffuse freely. However, it is difficult to recognize whether the substrates are distributed effectively and evenly in the areas to be treated. Therefore, in this project, a method of permeation grouting which has been often used in geotechnical engineering to improve the soil was applied. Using this method, experiments are conducted to evaluate the indexes of the permeability and persistence of the substrates in the column-shaped specimens, and to estimate the suitability of different substrates in different soil conditions. In this year, the project is divided into two parts. First, the dilution ratio of the substrate of HRC is varied to investigate the permeability and persistence in the column-shaped specimens, so that appropriate dilution ratio for the substrate may be proposed. Second, tests of permeation grouting are conducted for the specimens with very fine sand, so that appropriate substrates may be suggested for the sites with similar soil conditions. The results show the permeation of the substrates can be improved because of the change of dilution ratio. For the specimens made of Sand A(D50=0.45mm), Sand B(D50=0.30mm) and fine Sand(D50=0.23mm), while the dilution ratio for the substrate of HRC is 1:20, the targeted heights of permeation grouting can be achieved. It is found that the specimens with sand C and sand D(D50 are 0.01 and 0.05mm respectively) cannot be permeated by neither substrate EOS, HRC nor EcoClean. While the specimens with Sand E(D50=0.25mm) are used, the permeation heights for the substrates of HRC, EOS and EcoClean are 48, 42 and 43mm respectively. The persistence for all the three substrates is found 94% are remained 7 days after the clean water flow through the specimens. Up to now, it is found the conditions in which the substrates cannot permeate the specimens may be improved by changing the dilution ratio. For Sand E, the permeability of HRC is found the best, while the persistence of the three substrates are similar. The tasks to be completed in this project are: (1) to find the appropriate substrates for the specimens with sand F(D50=0.27mm); (2) to suggest the dilution ratio of the substrates for the specimens with Sand C, Sand D, Sand E and sand F.