地下水中MTBE降解技術探討

• Main Authors: Ming-Huei Huang, 黃名慧
• Other Authors: Tsung-Yueh Tsai
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/01527088138650475399

碩士 === 國立高雄第一科技大學 === 環境與安全衛生工程研究所 === 104 === The leaking substances of the underground storage tanks in the gas station were usually gasoline and diesel. Benzene, Toluene, Ethylbenzene, m.p-Xylene, o-Xylene (BTEX) and methyl tert-butyl ether (MTBE) were the main components in gasoline. In particular, these compounds were dissolved in water easily, therefore, they also could be transferred into groundwater easily when the underground storage tanks leaked. How to remove these compounds from groundwater was a very important issue. In this study, the bio-stimulation was proposed for increasing the degradation of these contamination in groundwater. The microorganism source of the bio-stimulating nutrient agent for the bio-stimulation was obtained from the MTBE contaminated groundwater. Two contaminated groundwater were selected as test sites to evaluate the efficiency of the bio-stimulation, one site was contaminated by MTBE only (M sample) and another one was contaminated by BTEX and MTBE (MB sample). The results show the characteristic of the contaminated was the most important factor for the MTBE removal efficiency. In the MB sample, whether or not to add the bio-stimulating nutrient agent, we could observed the high removal rate of the BTEX, but it was not effective for the MTBE degradation. On the other hand, in the M sample, 99% MTBE was degraded around 6 – 14 days, it means that MTBE could be degraded by some especial microorganism in specific environment. Finally, this bio-stimulating nutrient agent was used in the actual gasoline contaminated site. The benzene concentration was reduced from 0.1 mg/L to 0.03 mg/L, and the concentration of toluene, ethylbenzene and Xylene were reduce to below detection limit. In particular, MTBE concentration was reduce from 3 mg/L to 0.2 mg/L. It was confirm the feasibility of bio-stimulation for degrading the BTEX and MTBE in the contaminated groundwater.