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年度	109	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	水刀注藥技術強化含氯有機溶劑場址-生物整治模場試驗計畫
中文關鍵字	水刀注藥技術,含氯場址⽣物整治
專案英文名稱	Pilot Study of Using Waterjet Injection Technology to Enhance Bioremediation of Chlorinated Solvents Contamination
英文關鍵字	Waterjet Injection Technology, Enhanced Bioremediation of Chlorinated Solvents Contamination
執行金額	2,300,000元
執行期間	2020/1/1 至 2021/11/30
計畫中文摘要	我國公告列管之含氯有機溶劑土壤/地下水污染場址解除列管比例偏低，顯示此類場址整治之困難。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、或是高/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。本研究冀以水刀注藥工法突破此技術瓶頸，由現地操作探討此技術之可行性、應用性與效益，發展本土化且實際可行之整治技術，提供污染場址於擬定改善計畫時更多樣性的工法選擇。 本計畫擇定臺南市安定區安定段2085-0000地號為水刀注藥模場計畫試驗場址，目前經公告為地下水污染地下水管制區。試驗區域地下水三氯乙烯濃度為1 mg/L，超過第二類地下水污染管制標準20倍。同時測得降解產物順-1,2-二氯乙烯，顯示試驗區域已出現自然衰減作用，適合試驗水刀注藥工法。 計畫預定於期中及期末查核點執行之工作項目皆已完成，包括1) 取得地質鑽探資料；2) 監測井設置及微水試驗/單井流速流向測定、簡易井設置；3) 水刀注藥試驗規劃及現場作業；4) 地下水採樣分析及後續監測。 地下水水質監測及採樣分析結果顯示，水刀注藥作業3個月後，監測井MW1三氯乙烯濃度已從1 mg/L降低至小於第二類地下水污染管制標準（0.05 mg/L）。顯見水刀注藥工法已成功啟動試驗區域之現地厭氧還原脫氯生物降解，於短時間內完成三氯乙烯污染整治；並有效讓基質藥劑與污染物傳佈至污染物周邊，有效處理難透水層的污染。
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. Organic solvent contamination is difficult to clean up. Natural attenuation is observed at most of the chlorinated solvent contamination sites in Taiwan, which implies that enhanced in situ reductive dechlorinated bioremediation (EIB) is feasible and practical here. However, the current delivery technologies that inject substrates that enhance microbial remediation via injection wells have fixed screen intervals and 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. This study represents a pilot remediation project using waterjet injection technology to evaluate and verify the feasibility of the technology. The objectives of this study are to explore the application and effectiveness of waterjet injection technology to develop a localized and practical way to enhance in situ dechlorination bioremediation (via the delivery of substrates) that is expected to foster natural attenuation and remediation. The site selected for this study is located at Tainan City, Anding District, Anding Section; Land Serial No.: 2085-0000. The site had been declared as a Groundwater Pollution Control Zone. Before the onset of remediation, the TCE (trichloroethylene) concentration in groundwater was about 1 mg/L, which is 20 times above the Second Category Groundwater Pollution Control Standard. The degradation compound of TCE, cis-1,2-DCE (cis-1,2-dichloroethylene), was found as well, which implies that natural attenuation is on-going, so the site was suitable for a waterjet injection pilot test. The following work has already been conducted in current project: 1) Geological survey data collection; 2) Groundwater monitoring well installation, and slug and pumping tests; 3) Waterjet pilot test design and waterjet field work; and 4) Groundwater monitoring well sample collection and analysis. In conclusion, after the waterjet field work has been conducted for three months, the groundwater monitoring data showed that TCE concentration in the monitoring well MW1, was degraded from 1 mg/L to below the secondary category of Groundwater Pollution Control Standards (0.05 mg/L). The waterjet injection technology had successfully enhanced the anaerobic bioremediation of chlorinated solvent contamination at the pilot area in a short period of time. The waterjet injection technology had also effectively delivered the substrate to the surrounding area of contaminants and improved the biotreatment of the residual bound contamination in the low permeability zones.