某垃圾发电厂地下水污染模拟研究

Simulation study on groundwater pollution of a garbage power plant

垃圾焚烧发电是提高城市生活垃圾处理技术的有效举措。本文以芜湖某垃圾发电厂为对象,基于现场水文地质条件和GMS(Groundwater Modeling System)软件分别建立了地质结构模型、地下水流概念模型和数值模型以及溶质运移数值模型,模拟了不同类型污染物的污染路径和污染羽迁移状况,分析了污染对地下水环境可能造成的影响。结论可知:污染物在含水层中会沿地下水流方向呈近似椭圆形状运移,且在水流的反方向亦有运移;同一模拟时段内,COD和氨氮会随时间在局部造成一定程度的污染,但是污染物的垂向迁移距离均未到达细砂含水层,所有污染物在模拟时段内均未抵达长江,故不会影响长江水质。

Waste incineration power generation is an effective initiative to improve municipal solid waste disposal technology. A case study on groundwater pollution is performed at garbage power plant in Wuhu.Geological structure model,conceptual model of groundwater flow and numerical model of solute transport is estimated based on site hydrogeological conditions and GMS( Groundwater Modeling System) software.Migration path of the contaminant plume for different types of pollutions are then simulated. At last,the impact of contaminant on groundwater environment is analysed. The study shows that the contaminants in the aquifer will transport along and opposite to the direction of groundwater flow similar to an elliptical shape; within the same simulation period,the contaminant COD and NH4-N will cause contamination locally; all contaminants in the simulation period does not reach the fine sand layer downward and does not arrive at the Yangtze River and it will not affect the water quality of the river.