成果專區 - 土壤及地下水污染整治基金補助研究與模場專案宣導網

專案基本資料

年度	110	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	國立中央大學	申請系所	生命科學系
專案主持人	陳師慶	職等/職稱	教授
專案中文名稱	開發高效脫氯生物膠體及優化生物包埋整治工法：現地模場試驗
中文關鍵字	脫鹵球菌,生物膠體,氯乙烯,完全脫氯
專案英文名稱	Develop high-efficiency dechlorination bio-gel and optimize the immobilized strategy of bioremediation in chlorinated contamination: pilot study
英文關鍵字	dehalococcoides, bio-gel, vinyl chloride, completed dechlorination
執行金額	2,200,000元
執行期間	2021/1/1 至 2021/11/30
計畫中文摘要	三氯乙烯含氯有機物因其特性為比水重之非水相液體(dense non-aqueous phase liquid, DNAPL)，進入地下環境後，因其低黏滯性使其可在地表下快速移動，低表面張力使其容易穿入土壤小孔隙或岩石裂隙，造成整治困難度高。生物整治法被喻為自然、環保及節能的處理技術，也是目前環境污染整治的趨勢。現地生物復育技術可行性其中最重要條件之一為場址本身須具有可降解污染物之微生物。當場址中可降解污染物微生物數量較低或場址整治急迫性高時，可額外添加微生物進行生物強化(Bioaugmentation)整治受污染之場址。雖然許多微生物已證明可降解TCE至中間產物 Vinyl chloride (VC)，但VC具有更高毒性和累積性，因此如何去除環境中 VC 污染，是生物復育一項重要課題。本研究第二年度欲應用本團隊所開發之脫氯膠體於現地地下水污染整治，本場地使用生物刺激工法無法達到改善地下水污染物之成效，會導致地下水累積cis-DCE。然而，使用脫氯膠體搭配生物刺激工法，可以迅速改善地下水污染物之整治成效，cis-DCE可以被完全脫氯成乙烯，cis-DCE降解率可以達到80-100%，同時，位於上游之脫氯膠體反應井功效範圍至少可以影響到下游6m的下游井。並且對於新流進的外源污染物可以持續降解，單一脫氯膠體可以使用超過250天以上，本生物膠體整治工法可以達到良好的污染攔截效果。
計畫英文摘要	Chlorinated organic compounds such as trichloroethene (TCE), which characteristic is dense non-aqueous phase liquid (DNAPL). When entering the underground environment, it can move rapidly under the surface due to its low viscosity, and its low surface tension makes it easy to penetrate the soil small pores or rock cracks, causing remediation difficult. Bioremediation has been hailed as a natural, eco-friendly and energy-saving treatment technology, and also the current trend of environmental pollution remediation. One of the most important conditions for on-site bioremediation technology is that the site itself must have microbes that can degrade contaminants. When the number of the degradable microbes at the site is low or the remediation site is of high urgency, additional microorganisms may be added for bioaugmentation to remediate contaminated sites. Although many microorganisms have been shown to degrade TCE to the intermediate product Vinyl chloride (VC), VC is more toxic and cumulative, so how to remove VC contamination in the environment is an important issue in biological breeding. In the second year of this study, we intend to apply the dechlorinated colloid developed by our team to groundwater pollution remediation on-site. In the mid-term progress, it was verified that the biostimulation method used in this site could not achieve the effect of improving groundwater pollutants, and it would cause groundwater to accumulate cis-DCE. However, the use of dechlorinated colloids with biological stimulation methods can quickly improve the effectiveness of groundwater pollutants remediation. cis-DCE can be completely dechlorinated into ethylene, and the degradation rate of cis-DCE can reach 80-100%. The efficiency range of the dechlorinated bio-gel reaction well can affect the downstream wells at least 6m downstream. In addition, the newly introduced exogenous pollutants can be continuously degraded. A single dechlorinated bio-gel can be used for more than 250 days. The dechlorinated bio-gel remediation method can achieve a good pollution interception effect.

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