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年度	108	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	中臺科技大學	申請系所	環境與安全衛生工程系
專案主持人	張益國	職等/職稱	副教授
專案中文名稱	機械/化學方式處理分離油污染土壤
中文關鍵字	總石油碳氫化合物, 機械碰撞, 化學氧化, 水力漩流分離
專案英文名稱	Mechanical/chemical treatments for oil contaminated soils separations
英文關鍵字	total petroleum hydrocarbon, mechanical collision, chemical oxidation, hydrocyclone separation
執行金額	828,705元
執行期間	2019/1/1 至 2019/11/30
計畫中文摘要	本研究以「機械/化學方式處理分離油污染土壤」，架接於現有技術上，應用超音波震盪、擦洗等處理方式，添加非結晶型二氧化矽當研磨介質，使用高氧水增加化學氧化能力，探討是否增進總石油碳氫化合物(TPH)去除處理效能。 首先(1)應用超音波震盪機械碰撞、添加非結晶型二氧化矽當介質，以35 mg/l高氧水當試劑水，水洗固液比設計為1:2情況下，可得TPH去除率72.7%；使用自來水當試劑水，最佳TPH去除率74.2%。處理高TPH油污染土壤較低TPH油污染土壤效果略佳。高氧水使用與否，對TPH去除無明顯差異。而添加非結晶型二氧化矽為重要之實驗條件，不同添加比例(1:200、1:100、1:50)均對TPH去除有所助益。(2)利用擦洗處理處理高TPH油污染土壤時，添加非結晶型二氧化矽為重要之實驗參數，對TPH去除有所增進。利用擦洗處理低TPH油污染土壤時，非結晶型二氧化矽添加比例1:200、反應30分鐘為較合適之條件。(3)水力漩流分離土壤，模擬入流速度以3.5m/s對細顆粒分離效果較佳。實際漩流試驗後，underflow stream 顆粒63μm以下佔15.9%、63μm以上佔84.1%； overflow stream 顆粒中(應為細顆粒土壤)63μm以下佔75.7%、63μm以上佔24.3%，仍帶有部分粗顆粒土壤，原因可能是模廠泥水泵馬力不夠，導致流速不足，未來可藉增速改善。 本研究藉 (1)機械碰撞、(2)化學氧化、(3)水力分離系統，搭接於現有土壤清洗(soil washing)單元上，貼近實廠應用，促進粗細顆粒分離(污染物濃淡分級)。整體而言，非結晶型二氧化矽當研磨介質添加為重要之影響參數，可有效促進TPH去除；高氧水使用與否，則對TPH去除無明顯差異。超音波震盪及擦洗處理，對油污染土壤TPH去除可達62.0%〜79.0%間。
計畫英文摘要	In this work, we applied mechanical/chemical treatments for oil contaminated soils separations. The amorphous SiO2 from chemical mechanical polishing (CMP) wastewater was used as physical grinding agent in mechanical collision (ultrasonic treatment and scrubbing treatment). Due to the keen shape, it might be useful for oil-cluster particles separations. After that, the high oxygen-content fine bubble was applied as chemical oxidation to diminish total petroleum hydrocarbon (TPH) in particle. Firstly, under the conditions of ultrasonic treatments, the optimum TPH diminishment 72.7% was achieved by applying 35mg/l high oxygen-content water with liquid to solid ratio (L/S) 2, 74.2% TPH diminishment was achieved by applying tap water. There was no significant different between the use of high oxygen-content water and the tap water as reagent. But the amorphous SiO2 particles additions played an important role in TPH diminishment. Under the scrubbing treatment, the amorphous SiO2 particles additions was also important for high TPH-content soils treatment. Furthermore, the optimum separation process was approached through hydrocyclone separation. The FLUENT flow simulations are applied to calculate the cut-off size and fractional efficiencies in hydrocyclone separators. Finally, through upon mechanical/chemical treatments, the oil contaminated soils (esp. high TPH content soils) might be physical separated. The soils might be reused and the TPH concentration might be reduced.