Fluid-Solid Coupling Model of Contaminant Transport Considering Landfill Biodegradation and Simulation

摘要

Based on the fluid-solid coupling and solution transport theory, the transport coupling model of organic contaminant in landfill leachate was established. The decay equation of landfill biodegradation was founded by experiments because the biodegradation was taken into consideration. The established model was numerically solved by Galerkin method, which simulated the transport behaviors of organic contaminant of landfill leachate in groundwater. It predicted the temporal and spatial distribution features of contaminant concentration. The modeling results of coupling and uncoupling were compared with monitoring data respectively. And the contaminant plume areas and distribution range were numerically simulated. The results showed that the changing trend of contaminant concentration simulated by the coupling model agreed with monitoring data. Thus it is verified the coupling model is reliable and practical.