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Developing a Numerical Model for Simulating In-Situ Biodegradation of an Organic Contaminant, TCE, in Biobarrier  

왕수균 (이화여자대학교 환경학과)
오재일 (중앙대학교 토목공학과)
배범한 (경원대학교 토목환경공학과)
Publication Information
Journal of Soil and Groundwater Environment / v.8, no.4, 2003 , pp. 12-20 More about this Journal
Abstract
This study presents a mathematical model for simulating the fate and transport of a reactive organic contaminant, TCE, degraded by cometabolism in dual-porosity soils during the installation of in situ biobarrier. To investigate the effect of dual-porosity on transport and biodegradation of organic hydrocarbons, a bimodal approach was incorporated into the model. Modified Monod kinetics and a microcolony concept were employed to represent the effects of biodegrading microbes on the transport and biodegradation of an organic contaminant. The effect of permeability reduction in biobarrier due to biomass accumulation on the flow field were examined in the simulation of a hypothetical field-scale in situ bioaugmentation. Simulation results indicate that the presence of the immobile region can decrease the bioavailability of biodegradable contaminants and that the placement of microbes and nutrients injection wells should be considered for an effective installation of biobarrier during in situ bioaugmentation scheme.
Keywords
bioaugmentation; bio biobarrier; dual-porosity soils; bioaccumulation; permeability reduction;
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