填埋场生活垃圾堆体快速排水技术  

Rapid drainage technology for domestic waste body in landfill

作　　者：王明超[1,2] 夏发发 张杰[1] 赵由才[1] 

机构地区：[1]同济大学环境科学与工程学院污染控制与资源化研究国家重点实验室,上海200092 [2]中国城市建设研究院有限公司,北京100120

出　　处：《环境工程学报》2017年第9期5175-5181,共7页Chinese Journal of Environmental Engineering

基　　金：国家科技支撑计划课题(2014BAL02B05)

摘　　要：我国生活垃圾含水率高,在填埋场降解过程中产生大量水分,加之由于气候等因素而导致的外源水分渗入,导致填埋场生活垃圾堆体水位过高,严重威胁填埋场安全作业。在实验室模拟的基础上,考察了不同工作方式(水带水、气带水、水带气、气带气)及工况下文丘里真空排水的排水效果,结果表明,改进后的文丘里循环污水动力排水法出水速度快,能在110 s内快速降低水位。在实际填埋场堆体,循环污水动力排水结合竖井排水技术可使作用中心处水位下降1.5 m,有效作用范围15 m。为高水位垃圾堆体的安全运行提供了一种快速、高效、实用的排水技术。Domestic waste is of high moisture content,producing large amounts of water in biodegradation process,which results in high water level in waste body and a serious threat to the safe operation of landfill.On the basis of laboratory simulation,different working modes（water-drive-water,gas-drive-water,water-drive-gas,gas-drive-gas）,and operation conditions of Venturi vacuum drainage were investigated. The modified Venturi circulation sewage power drainage method is of high drainage velocity,and can reduce the water level rapidly in110 s. Combining with shaft drainage technique,the optimized Venturi vacuum drainage was applied for practical waste body with the effective radius of 15 m,and central water level decreased by 1. 5 m. It proved a fast,efficient and practical drainage technology for the safe operation of the landfill with high water level.

关 键 词：生活垃圾堆体 文丘里管 真空 排水 

分 类 号：X705[环境科学与工程—环境工程]