垃圾填埋场防渗层破损后渗滤液及氨氮运移规律研究  

Simulation of Leakage and Ammonia-nitrogen Transport of HDPE Film in Landfill under Different Breakage Scenarios

作　　者：张静 周乾霜 郭航 陶春节 罗安娜 Zhang Jing;Zhou Qianshuang;Guo Hang;Tao Chunjie;Luo Anna(College of Hohai,Chongqing Jiaotong University,Chongqing 400074,China;Chongqing Wuling Environmental Technology Co.,Ltd.,Chongqing 401320,China)

机构地区：[1]重庆交通大学河海学院,重庆400074 [2]重庆物灵环保科技有限公司,重庆401320

出　　处：《环境科学与管理》2024年第1期55-60,共6页Environmental Science and Management

基　　金：重庆市城市管理局基金项目(城管科字【2022】第33号);重庆市自然科学基金面上项目(CSTB2022NSCQ-MSX0617);重庆交通大学2022年大学生创新创业训练计划校级项目(X202210618015)。

摘　　要：将垃圾填埋场防渗膜破损后渗滤液下渗强度经验模型与地下水溶质运移模拟耦合,实现变源强条件下污染物在潜水含水层中的迁移模拟。结果表明:防渗膜机械破损时渗漏量最大,撕裂破损次之,针孔破损最小。填埋期,三种假设破损情景下的渗漏量分别为119.0 m^(3)/d、51.74 m^(3)/d及20.70 m^(3)/d。封场期间的渗漏量分别为71.82 m^(3)/d、31.23 m^(3)/d及12.49 m^(3)/d。封场后期的渗漏量分别为18.41 m^(3)/d, 8.0 m^(3)/d及3.20 m^(3)/d;防渗膜机械破损、撕裂破损及针洞破损情景下对潜水含水层中氨氮浓度的影响依次减小,氨氮最大贡献浓度分别为96.83 mg/L,46.79 mg/L及19.24 mg/L。Under different scenes,the empirical model of leachate infiltration is coupled to the groundwater solute transport models,which could implement to simulate the pollutant migration with variable pollutants concentration in aquifers.The following results could be obtained:the leakage with mechanical damage of HDPE film is largest,then that with tearing damage is secondly.The leakage of HDPE film with pinhole damage is smallest.During the landfill period,the average leakage with mechanical damage,tearing damage and pinhole damage are 119.0 m^(3)/d,51.74 m^(3)/d and 20.70 m^(3)/d,respectively;During the sealing period,the average leakage was 71.82 m^(3)/d,31.23 m^(3)/d and 12.49 m^(3)/d,respectively.During seal completing period,the average leakage was 18.41 m^(3)/d,8.0 m^(3)/d and 3.20 m^(3)/d,respectively.The effects of mechanical damage,tearing damage and pinhole damage on ammonia nitrogen concentration in aquifer decrease successively.The maximum concentrations of ammonia nitrogen under different conditions were 96.83 mg/L,46.79 mg/L and 19.24 mg/L,respectively.

关 键 词：HDPE膜 防渗层破损 溶质运移 渗漏量 垃圾渗滤液 

分 类 号：X705[环境科学与工程—环境工程]