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題 名 | 生物分解方法應用於受碳氫化合物污染之地下水整治--一維數值模擬=Groundwater Remediation with Biodegradation--One-Dimensional Numerical Simulation |
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作 者 | 溫志超; 陳榮松; 莊宜俍; | 書刊名 | 農業工程學報 |
卷 期 | 45:3 1999.09[民88.09] |
頁 次 | 頁58-68 |
分類號 | 445.463 |
關鍵詞 | 邊界層法; 生物整治; 碳氫化合物; Boundary layer theory; Bio-remediation; Hydrocarbon; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究假設微生物濃度為定值,應用邊界層法,將碳氫化合物與氧之濃度隨位 置與時間變化之問題,轉換為碳氫化合物與氧之漸變段長度隨時間變化之問題,再 行求解。並在很小的時段內,以質量平衡原理估算出根區之後退量,描述入侵前緣 移動與根區後退之情形。 研究中發現碳氫化合物濃度(C0)愈大,氧入侵前緣移動量愈小。同理,氧濃度(S0) 愈大,碳氫化合物入侵前緣移動量愈小。碳氫化合物與氧半飽和常數(Kc與Ks)愈小, 入侵前緣之間距愈小。故S0增加、Kc和Ks減小,將有利碳氫化合物污染地下水之 生物整治。 |
英文摘要 | Groundwater contaminated with hydrocarbon can be remedied by biodegradation process, for its low cost and harmlessness. In this study, a constant microbial concentration is assumed. A model for simulating the process in porous media was developed with the boundary layer theory to approach diffusion and biodegradation processes. In addition, considering the influence of dispersion on the backward movement of the root zones, a moving boundary condition for studying the concentration variation of hydrocarbon and oxygen in the biodegradation process was developed. It was found that the higher the hydrocarbon concentration (C0), the less the intrusion of the oxygen concentration. In other words, the higher the oxygen concentration (S0), the less the intrusion of the hydrocarbon concentration. At low value of kc and ks, the hydrocarbon and oxygen are consumed rapidly as well as the intrusion of leading edges of hydrocarbon and oxygen are seriously restricted. Consequently, an increment of S0 and decrement of kc and ks result in an advantage of bio-remediation of groundwater. |
本系統中英文摘要資訊取自各篇刊載內容。