垃圾填埋场生物覆盖材料筛选及甲烷减排  

Screening of landfill bio-cover materials and their effect on methane reduction

作　　者：赵玲[1] 王丹[1] 尹平河[1] 赵超[1] 武晶[1] 

机构地区：[1]暨南大学环境工程系,广州510632

出　　处：《环境工程学报》2012年第10期3719-3724,共6页Chinese Journal of Environmental Engineering

基　　金：国家基金-广东联合基金重点项目(U1133003);国家自然科学基金资助项目(41076068);暨南大学科技创新重大重点项目(1612161)

摘　　要：通过模拟柱实验研究了消化污泥、矿化垃圾和黏土作为垃圾填埋场生物覆盖材料的甲烷氧化能力。3种材料的甲烷日氧化率平均值、总氧化率和氧化速率V(CH4)分别是:消化污泥10.27%、75.82%、1.76 mmol/(kg·d);矿化垃圾11.05%、75.61%、2.04 mmol/(kg·d);黏土9.05%、68.15%、1.33 mmol/(kg·d),消化污泥和矿化垃圾对甲烷的氧化能力均大于黏土。进一步探讨了消化污泥中添加粉煤灰、建筑垃圾和黏土进行改性后对甲烷的氧化能力,考察了改性污泥的渗透系数和抗压强度。结果表明:粉煤灰对消化污泥的改性效果最好,其日氧化率平均值、总氧化率和V(CH4)分别达到17.27%、92.37%和2.35 mmol/(kg·d),粉煤灰与消化污泥以1∶1～1.5∶1混配后可满足填埋场对覆盖材料渗透系数和抗压强度的要求。The methane oxidation of 3 bio-covers（sewage、aged refuse and soil） was studied through simulation columns experiment.The results showed that average daily methane oxidation rate,methane conversion and reaction rate V（CH4） of sewage,aged refuse and soil were 10.27%,75.82%,1.76 mmol/（kg·d）;11.05%,75.61%,2.04 mmol/（kg·d） and 9.05%,68.15%,1.33 mmol/（kg·d）,respectively.The methane oxidation capacities of sludge and aged refuse were better than soil.Methane oxidation and geotechnical properties of sludge which were modified by 3 solid modifiers（coal ash,construction wastes and soil） were also studied.Sludge modified by coal ash presented best ability for methane oxidation among the 3 modifier,which average daily oxidation rate,methane conversion and V（CH4） were 17.27%,92.37%and 2.35 mmol/（kg·d）,respectively.The engineering requirements of osmotic coefficient and compressive strength for cover material of landfill site were satisfied when the mixed ratio of coal ash and sludge was 1∶ 1～1.5∶ 1.

关 键 词：垃圾填埋 生物覆盖材料 甲烷氧化 渗透性 抗压强度 模拟柱实验 

分 类 号：X705[环境科学与工程—环境工程]