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	研究專案	研究主題	整治
申請機構	國立臺北科技大學	申請系所	土木工程系／土木與防災研究所
專案主持人	陳映竹	職等/職稱	副教授
專案中文名稱	以微奈米氣泡反應器及生物離子液處理含氯汙染地下水:研究型試驗
中文關鍵字	微奈米氣泡, 生物離子液, 氯, 地下水
專案英文名稱	Treatment of Chloride Contaminated Groundwater by Micro-nanobubbles Reactor with Bio-TEE
英文關鍵字	micro-nanobubbles, Bio-TEE, chlorine, groundwater
執行金額	1,020,000元
執行期間	2021/1/1 至 2021/12/31
計畫中文摘要	本計畫以含氯溶劑／有機物（CAHs）為目標污染物，處理受重質非水相容液（DNALP）污染之土壤地下水。由於 DNALP 污染場址整治需進行較長期時間，選擇生物整治工法相對經濟可行，利用微生物降解或改變有害物質成為無害或低毒性產物。添加基質可促進微生物生長以降解污染物，但市場上認可的基質選擇性少、常需進口且有專利問題。目前生物處理大部分均使用美國環保署認可之基質（如EOS）處理技術，而目前市場基質可替代性不多、且大多數基質仍在進行實驗或模場測試中。本計畫團隊已成功研發「微奈米氣泡生成器」及「生物離子液（TEE）」於處理高濃度工業廢水（氨氮污染）。本計畫結合MNB及基質生物反應降解土壤地下水中CAHs污染。試驗期間，水中溶氧濃度穩定介於5至7 mg/L之間，無缺氧現象。相較市售EOS基質反應需要土壤介質存在；TEE可於水中（非必須土壤環境）長期緩慢釋放離子，促使離子化反應進行。TEE在無土壤介質之反應環境中，導電度自反應第5天急速上升至1,600 mho/cm，延續至第30天仍有1,300 mho/cm之導電度。若先於含氯地下水中注入MNB可使VC濃度於15分鐘內由8 mg/L迅速下降至偵測極限以下濃度，添加2%過氧化氫溶液（H2O2）加速羥基自由基產生之效果有限。MNB樣品平均粒徑介於157.5～180.8 nm，符合奈米氣泡等級，用以前處理有助於削減水中CAHs污染物濃度，之後注入TEE基質進行生物反應之效果不顯著。整體氯離子濃度變化至第20天趨於平衡。本計畫研發之技術設備製作可控，能較一般傳統處理技術縮短處理時間、減少基質用量。TEE基質單價約為新臺幣5,000元/公升，其約為EOS的1/10價格，且用量約為受污染水體積之1/500~1/1,000。於案例場址之污染面積為5,000 m2且深度為10 m（體積為50,000 m3），在污染改善工程費用中，TEE之污染調查成本約為新臺幣2,100萬，為EOS之1/2。經試驗得知WS-EOS之污染物去除效率為WS-TEE之兩倍，即使需要使用兩倍TEE之藥劑量，污染改善工程費用增加至2124萬元，仍為EOS整治成本之1/2，原因為TEE製造成本仍屬低廉。對於含氯污染場址業者而言，TEE無論在處理成本、整治時間或清潔生產上仍具市場競爭性。本計畫團隊由國立臺北科技大學擔任主持單位（負責學理、實驗室檢測分析），兩家環基環境永續股份有限公司及多利鑫科技股份有限公司於實務技術面提供豐富經驗與經費支持，相信本計畫執行成果之可行性及市場需求性更為提升，可延續明年度模場型專案。
計畫英文摘要	This project takes chlorinated solvents/organic substances as target pollutants as non-aqueous liquid (DNALP) sites. Tthe biological remediation method using microorganisms to degrade or change harmful substances into harmless or low-toxic products is relatively economic feasible. However, the substrates in the market are less selective, often need to be imported, and have problems of patent. Most of the biological treatments using the EOS substrate is approved by the US Environmental Protection Agency, and most of them are still undergoing experiments and/or field tests. Our team has successfully developed the "micro-bubble generator (MNB)" and "relevant ionic liquid (TEE)" (as a kind of substrate) for removal of high-concentrated ammonia nitrogen from wastewater. Therefore, both of them were applied in this study to degrade chlorinated pollutants in soil and groundwater. The preliminary results of the mid-term report found that the TEE substrate can promote the formation of ions, and their conductivity of water increase sharply to 1,600 mho/cm. In either pure wastewater or soil-based media, TEE substrate can effectively degrade CAHs under aerobic condition (DO 5~7 mg/L). Micro-nanobubbles (MNB) with 157.5~180.8 nm diameters are injected into groundwater contaminated by CAHs, and VC pollution was efficiently degraded within 5 minutes. Mixing 2% H2O2 was not respectively increase the MNB’s efficiency. The MNB was helpful for reducing chlorinated pollutants but not TEE substrate. The whole experiments reach steady state at 20th day. The price of the TEE substrate is about NT$5,000/L, which is about 1/10 of the price of EOS, and the dosage is about 1/500~1/1,000 of the volume of polluted water. In the case study, the cost of pollution remediation of TEE is about NT$21 million, which is 1/2 of EOS. Even if twice the dosage of TEE is required, the cost of pollution remediation will increase to NT$21.24 million, which is still cheaper EOS remediation. The TEE is still competitive in the market in terms of treatment cost, remediation time or cleaner production. The project is chaired by the National Taipei University of Technology (responsible for academic science, laboratory testing and analysis), and the two Environmental Sustainability Co., Ltd. and Dolysin Technology Co., Ltd. provide rich experience and financial support in practical and technical aspects. It is believed that the feasibility and market demand of the implementation results of this project will be improved, and the model project of next year can be continued.

跳到主要內容:::

跳到主要內容 :::