摘要
开展了不同含量垃圾焚烧底渣与固化剂共同作用下,固化市政污泥工程特性研究。测定了固化体的含水率、有机质含量、重度、pH值、无侧限抗压强度、增容比及28 d渗透系数等工程指标。结果表明:固化体有机质含量及含水率随垃圾焚烧底渣含量的增多而降低;重度随底渣添加量增加而增大,在12~15 k N·m-3之间;固化体pH值、无侧限抗压强度、增容比及渗透系数均随底渣含量增加而增大。底渣添加量为40%左右时,固化体满足填埋要求。垃圾焚烧底渣作为骨料,增强了污泥固化体工程特性、减少了固化剂用量、同时实现以废治废,降低污泥和垃圾焚烧底渣处置成本。研究成果为污泥及垃圾焚烧底渣填埋处置提供了参数及指导作用。
An inorganic curing agent was added to another waste,containing differing percentages of municipal solid waste incineration（ MSWI） bottom ash,in order to treat municipal sludge. Engineering indexes of the resulting solid matrix were tested,including： water and organic content,density,pH,unconfined compressive strength,expansion ratio,and coefficient permeability. The results show that the organic and water contents of the solid matrix decreased with increasing MSWI bottom ash content. The density（ ranging from 12 to 15 k N·m^（-3））,pH,unconfined compressive strength,expansion ratio,and coefficient permeability of the solid matrix all increased with greater content of bottom ash. The solid matrix containing 40% bottom ash satisfies the criteria for landfillls. As a construction aggregate,MSWI bottom ash enhances the engineering characteristics of the solidified sludge,diminishes the dosage of curing agent,achieves the goal of using waste to treat waste,and reduces the cost of disposal of sludge and MSWI bottom ash. The study provides parameters and guidance for landfilling sludge and MSWI bottom ash.
作者
梁冰
胡学涛
陈亿军
LIANG Bing HU Xuetao CHEN Yijun(Institute of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000,China State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第11期6705-6710,共6页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(51279199)
中国科学院学科交叉与合作创新团队项目(人字(2013)47号)
中科院院地合作项目(武新管科创[2014]2号)
关键词
市政污泥
垃圾焚烧底渣
固化
不同添加量
工程特性
municipal sludge
waste incineration bottom ash
solidification
different contents
engineering characteristics
