仁寿生活垃圾填埋场超量渗滤液来源解析

Analysis of the Source of Excess Leachate in Renshou Domestic Garbage Landfill

摘要: 渗滤液是城市生活垃圾填埋场产生的首要污染物，垃圾渗滤液的产生量可通过科学公式计算及经验法获取，正常状况下填埋场垃圾渗滤液产生量是比较稳定的。本文以仁寿县生活垃圾填埋场渗滤液产量异常为切入点，通过对影响渗滤液产生量各要素的逐项核查与计算，查找填埋场受突水影响的根源，采用充电法和高密度电阻率法对填埋场底部开展防渗排查，对超量渗滤液的来源开展解析与验证，并对其迁移转化特征进行了研究。结果表明：仁寿生活垃圾填埋场底部防渗膜存在漏洞，受西侧紧邻干渠灌溉水渗漏及高水头影响，灌溉渗水沿场地边坡顺流经漏点进入垃圾填埋场，造成填埋场渗滤液超量产生。经水平衡核算，超量渗滤液的量与渠道渗水量具有高度相关性，本次研究成果为垃圾填埋场后续渗滤液的减量和治理提供了重要技术依据，同时可为其他同类问题提供研究方法和参考依据。

Abstract: Leachate is the primary pollutant produced by municipal solid waste landfills. The amount of landfill leachate produced can be obtained through scientific formula calculation and empirical methods. Under normal conditions, the amount of landfill leachate produced is relatively stable. This article takes the abnormal production of leachate from Renshou Domestic Waste Landfill as the starting point, and through itemized verification and calculation of various factors affecting the production of leachate, finds out the root cause of the impact of water inrush on the landfill. It uses the charging method and high-density resistivity method to carry out seepage prevention inspection on the bottom of the landfill, analyzes and verifies the source of excess leachate, and studies its migration and transformation characteristics. Results show that there issomeloopholes in the anti-seepage membrane at the bottom of Renshou Domestic Waste Landfill, which is affected by the leakage of irrigation water adjacent to the main canal on the west side. The irrigation water seepage flows through the leakage point along the site slope and enters the landfill, resulting in an excessive amount of landfill leachate. According to water balance accounting, the amount of excess leachate is highly correlated with the amount of canal seepage. The research results of this study provide important technical basis for the subsequent reduction and treatment of landfill leachate, as well as research methods and reference basis for other similar issues.