摘要
为探索旱寒地区生活垃圾填埋场渗滤液和填埋气等二次污染物原位削减的可行技术,在西北某填埋场建设了准好氧填埋工程示范,配合渗滤液回灌、填埋气主动负压收集和生物覆盖层过滤处理的工程措施,同时建设传统的厌氧填埋场作为对照组。示范填埋设计规模为20 t/d,共计运行188 d,总填埋量3 849.84 t。运行过程中18个填埋堆体气体采样器测试结果表明,氧气浓度平均为6.7%;填埋初期和作业期终止时,本工程渗滤液COD_(Cr)的浓度与对照组厌氧填埋场渗滤液COD_(Cr)浓度的比值分别为1.79和0.41,总氮浓度比值分别为2.61和0.93;作业期各导气井填埋气CH_(4)浓度均值为20.11%,填埋结束后21周为31.96%,主动收集气体的CH_(4)浓度均值为18.25%,生物过滤后可降至3.43%。以上表明,本工程示范的导气井-导排管-导气井填埋堆体通风通道设计,可形成堆体准好氧环境,在旱寒地区生活垃圾填埋场应用,具有原位削减渗滤液和填埋气环境负荷的作用。
In order to explore feasible technology for in situ reduction of secondary pollutants such as leachate and landfill gas from domestic waste landfills in arid and cold regions.The semi-aerobic landfill project demonstration was built in a landfill in the northwest region,with engineering measures of leachate recharge,as well as active negative pressure collection of landfill gas and biological cover filtration treatment.At the same time,traditional anaerobic landfill was constructed as the control group.The design scale of the demonstration landfill was 20 t/d,with a total of 188 days of operation and a total landfill volume of 3 849.84 tons.The results of the 18 samplers indicated that the average oxygen concentration was 6.7%.In this project and in anaerobic landfill in control group,the ratios of COD_(Cr) concentration of leachate were 1.79 and 0.41,the ratios of TN were 2.61 and 0.93,respectively,at the initial stage of landfill and the end of the operation period.The average methane concentration was 20.11% in each gas guide well during landfill operations,while it was 31.96% after 21 weeks when landfill was over,18.25% with the blower collected gas,and decreased to 3.43% after biofiltration.The above showed that semi-aerobic environment had been formed with the design of the ventilation channel of the landfill body of the gas guide well,drainage pipe and gas guide well,which could be used in the domestic waste landfill in arid and cold regions,and it had the effect of reducing the environmental load of leachate and landfill gas in situ.
作者
蒲红霞
邵立明
张根升
贺实月
张旭晨
何品晶
PU Hongxia;SHAO Liming;ZHANG Gensheng;HE Shiyue;ZHANG Xuchen;HE Pinjing(Tianjin JC Environmental Services Co.Ltd.,Tianjin 300202;Institute of Waste Treatment and Reclamation,Tongji University,Shanghai 200092)
出处
《环境卫生工程》
2023年第2期8-14,共7页
Environmental Sanitation Engineering
基金
国家重点研发计划项目(2018YFD1100600)。
关键词
准好氧填埋
旱寒地区
工程化试验
原位削减
semi-aerobic landfill
arid and cold regions
practical application research
in situ reduction
