生活垃圾渗滤液对地下水污染预测影响分析

Analysis on the Influence of Domestic Garbage Leachate on Groundwater Pollution Prediction

地下水作为水文生态系统中不可缺少的重要组成部分,是农业灌溉、工业生产和人民生活的重要水源。随着人类生产生活范围的拓展和延伸,地下水环境正面临着严峻的挑战,地下水污染防治已引起人们的关注,垃圾焚烧发电场地配套建设的垃圾渗滤液处理设施因渗滤液调节池存在破损事故,极易造成地下水污染,严重影响区域居民的用水安全。通过对生活垃圾焚烧场地开展区域水文地质调查,对渗滤液收集池影响地下水污染趋势进行了预测分析,结果表明:事故工况下垃圾渗滤液调节池发生污水泄漏事件,污染物COD_(Mn)和氨氮持续进入地下水中,易对场地内地下水造成影响,间接影响场地外地下水。因此,该生活垃圾焚烧场地需做好日常地下水防护工作,按规范做好废水收集、储存、输送、处理系统构筑物及管路的防渗、防沉降处理,以防范对地下水环境质量的可能影响。以期为类似项目对地下水影响预测提供参考建议,具有一定的实际意义。

As an indispensable part of the hydrological ecosystem,groundwater is an important water source for agricultural irrigation,industrial production and people’s life.With the expansion and extension of human production and living scope,the groundwater environment is facing severe challenges.The prevention and control of groundwater pollution has attracted people’s attention.The garbage leachate treatment facilities built in the garbage incineration power generation site are prone to groundwater pollution due to the damage accident of leachate regulating pool,which seriously affects the water safety of regional residents.Through the regional hydrogeological survey of the domestic waste incineration site and the prediction and analysis of the groundwater pollution trend of the leachate collection pool,the results show that under the accident condition,the sewage leakage event occurs in the leachate regulation pool,and the pollutants COD_(Mn) and ammonia nitrogen continue to enter the groundwater,which is easy to affect the groundwater inside and indirectly affect the groundwater outside.Therefore,the domestic waste incineration site needs to do a good job in daily groundwater protection,and do a good job in anti-seepage and anti-settlement treatment of structures and pipelines of wastewater collection,storage,transportation and treatment system according to the specifications,so as to prevent possible impact on groundwater environmental quality.The analysis results of this paper provide reference and suggestions for the prediction of the impact of similar projects on groundwater.