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年度	104	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	利用滲透灌注技術於地下水生物整治之應用研究
中文關鍵字	現地生物整治, 滲透灌漿, 基質, 含氯有機物, 地下水汙染
專案英文名稱	Application of the Permeation Injection Technique to Groundwater Bioremediation
英文關鍵字	in-situ bioremediation, permeation grouting, substrate, chlorinated organic compound, groundwater contamination
執行金額	1,000,000元
執行期間	2014/12/1 至 2015/11/30
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，將基質或營養鹽注入，使其自然沈降並擴散，來加強微生物生長與降解反應，達到分解汙染物之效果。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。 本年度計畫為建置一套滲透灌注試驗設備，以低壓滲透的方式，將市售三種基質灌注於四種不同粒徑分佈的砂柱試體，針對其滲透性與持續性等進行探討。 試驗結果發現，中砂(D50=0.51mm)試體中，三種基質皆能達到目標灌注高度；再者，A砂(D50=0.45mm)、B砂(D50=0.30mm)及細砂(D50=0.23mm)方面，僅EcoClean能達到目標灌注高度。而HRC與EOS可能由於黏滯性較高、稀釋濃度較濃的影響，致使最終未能達目標高度；持續性試驗結果顯示，HRC的殘留率最高，EOS次之，而EcoClean較其他二者為差。 綜合而言，HRC的持續性最佳，但仍有在質地較細的試體中無法達到目標灌注高度的問題。建議未來可針對基質的稀釋比例、灌注體積或灌注壓力的調整等面向，進行更深入之探討，藉以找尋最佳的灌注條件，來達到預期之灌注目標。
計畫英文摘要	In-situ bioremediation is a method which has been often used to treat the groundwater polluted by the 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 they will settle and diffuse freely. To enhance microorganisms growth and degradation reaction, consequently, the pollutants can be decomposed. 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 frequently used in geotechnical engineering to improve the soil was applied. Using this method, experiments are conducted to evaluate the index of the permeability and persistence of the substrates in the column-shaped specimen, and to estimate the suitability of different substrates in different soil conditions. In this year, an experimental equipment for permeation grouting was established. Using this equipment, a method of low pressure permeation was applied to injected 3 different kinds of commercial products of substrates (namely, EOS, HRC and EcoClean) into the column-shaped specimens of the soils with different particle size distribution to observe the permeability and persistence of the substrates. Test results are as follows. For the specimens of medium sand (D50=0.51mm), the targeted heights of permeation grouting was reached for the 3 kinds of substrates. As for the specimens of sand A (D50=0.45mm), sand B (D50=0.30mm) and fine sand (D50=0.23mm), only EcoClean could reach the targeted heights. Because of greater viscosity and higher concentration, HRC and EOS could not reach the targeted heights. The results of persistence showed that the retention rates of the substrates, in decreasing order, were HRC, EOS and EcoClean. In general, HRC has the best persistence, however, for some specimens with finer soils, it can not reach the targeted heights of permeation grouting. It is suggested dilution ratios of the substrates, volumes and pressures of permeation grouting be studied and adjusted in the future to obtain the optimum permeation grouting condition to achieve the goal of permeation grouting.