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年度	112	專案性質	實驗性質
專案類別	模場試驗	研究主題	整治
申請機構	朝陽科技大學	申請系所	環境工程與管理系
專案主持人	張簡水紋	職等/職稱	教授
專案中文名稱	水刀注藥技術對運作中工廠含氯污染整治—模場試驗計畫(第二年)
中文關鍵字	水刀注藥技術, 運作中工廠含氯污染生物整治
專案英文名稱	Pilot Study of Using Waterjet Injection Technology to Enhance Bioremediation of Chlorinated Solvents Contamination in Operating Factories (2nd)
英文關鍵字	Waterjet Injection Technology, Enhanced Bioremediation of Chlorinated Solvents Contamination, Operating Factories
執行金額	2,970,000元
執行期間	2023/10/1 至 2024/12/31
計畫中文摘要	我國公告列管含氯有機溶劑土壤地下水污染場址解除列管比例偏低，顯示此類場址整治困難。國內含氯場址多可發現自然衰減作用，適用加強式現地厭氧還原脫氯生物整治法，惟現行的灌注井固定深度注入方式無法有效解決低透水性區域、或高/低透水性夾雜互層區域的含氯有機溶劑污染，實為技術瓶頸。 研究團隊針對灌注工法瓶頸問題引進水刀注藥技術，於素地污染場址進行2年模場試驗，取得良好成效。根據試驗成果，以水刀注藥工法灌注基質藥劑後，場址含氯污染區域能有效啟動並持續進行加強式現地厭氧還原脫氯生物降解；與現行注藥工法相比，可在低透水性或者高/低透水性夾雜互層的區域，讓基質藥劑有效的傳輸到污染物周邊、處理氯烯類污染。惟前期場址均為污染場址外素地，故本計畫進一步針對不同條件真實環境：運作中工廠含氯污染場址進行水刀注藥模場試驗，進行測試實證。 本計畫擇定嘉義縣民雄鄉秀和興業股份有限公司為水刀注藥模場計畫試驗場址，目前經公告為土壤及地下水污染地下水整治場址。試驗區地下水四氯乙烯濃度達75.4 mg/L，超過第二類地下水污染管制標準。本計畫至期末查核點已完成：1) 地質鑽探作業；2) 地下水採樣分析； 3) 水刀注藥現場試驗作業；及 4) 地下水質監測與採樣分析。根據場址土壤質地、污染物濃度以及藥劑分布傳輸效果，本次規劃3個水刀注藥改良體，並以每15 cm垂直間距執行水刀切割與藥劑灌注。根據試驗結果，在地質條件為堅實緊密、土壤質地為緻密的坋土/細砂/黏土夾層區域，水刀注藥作業之影響半徑可能需要規劃小於1 m，方能更有效作用於標的監測井。
計畫英文摘要	Great attention has been given to the reductions in chlorine-containing organic solvents of the soil and groundwater contaminated sites at regulatory listing in Taiwan. Organic solvent contamination is difficult to clean up. Natural attenuation is observed at most of the chlorinated solvent contamination sites, which implies that enhanced in-situ reductive dechlorinated bioremediation (EIB) is feasible and practical. However, the current delivery technologies cannot effectively spread substrates nor put them into contact with contaminants. Subsurface waterjet technology is developed here to improve the biotreatment of residual bound contamination and eliminate contaminants rebound at low permeability zones. The team had already conducted a two-year pilot remediation project using waterjet injection technology to treat chlorinated organic solvent contamination at vacant lot in Taiwan. According to the results, the anaerobic bioremediation of chlorinated solvent contamination at the treated area had been successfully and continuously enhanced after the waterjet injection, which implied the technology had effectively delivered the substrate to the surrounding area of contaminants and improved the biotreatment of the residual bound contamination in the low permeability zones. For further understanding and evaluating the feasibility of the technology when applying to the operating factories with chlorinated organic solvent contamination, another two-year pilot remediation project is planned. The objectives of this study are to explore the application and effectiveness of waterjet injection technology and to develop a localized and practical way to enhance in-situ reductive dechlorinated bioremediation (i.e., the delivery of substrates). Hope to provide an alternative solution for remediation planning of the operating factories to reduce the time period of remediation where excavation is not practical and repeated back diffusion is a problem. The site selected for this year is Shuwa Manufactory Co., Ltd., located at Minxiong Township, Chiayi County, which is currently declared a Soil and Groundwater Pollution Remediation Site. The groundwater PCE concentration was around 75.4 mg/L, which is above the Second Category Groundwater Pollution Control Standard. The following work items had already been conducted as scheduled: 1) geological survey data collection; 2) groundwater sample analysis; 3) waterjet field work; and 4) groundwater monitoring. Three waterjet columns were implemented with 15 cm vertical intervals. The groundwater monitoring results implied that the radius of influence of the waterjet column might have to be shorter than 1 meter to have the substrate to be distributed to the surrounding areas of targeting monitoring well.