环境工程学报2011，Vol.5Issue(12)：2864-2868,5.
改性污泥替代垃圾填埋场覆土的研究
Study of modified sludge as landfill cover soil
摘要
Abstract
This research took municipal sewage sludge as the object, using curing agent to change charac- teristics of the sludge. The feasibility of cured products to be used as landfill cover soil was discussed, through analyzing the compressive strength and permeability coefficient of cured products under different proportion of cu- ring agent added, and comparing COD, ammonia and heavy metal concentration of leaching solutions of cured products with different curing times. The results showed that, the compressive strength of cured products with a curing agent proportion of 30% reached over 50 kPa, and its permeability coefficient was up to 10-7cm/s, which could meet the standard of casing soil. And the maximum leaching of heavy metals was much lower than the Class I of effluent standards in the Integrated Wastewater Discharge Standard （GB8978-88）. COD and ammonia in the leaching solutions of cured products tended to decrease with longer curing time. The amount of heavy met- als such as lead and cadmium in the leaching solutions decreased significantly, the amount leached out were less than 1% of their contents. Curing was helpful to reduce leaching contamination of cured products, and sludge with 30% of curing agent could be used for landfill cover soil material after a curing time of three days.关键词
市政污泥/固化/抗压强度/渗透系数/资源化Key words
municipal sludge/solidification/compressive strength/permeability coefficient/resource recovery分类
资源环境引用本文复制引用
邹庐泉,吴长淋,伍静静..改性污泥替代垃圾填埋场覆土的研究[J].环境工程学报,2011,5(12):2864-2868,5.基金项目
基金项目：上海优秀学科带头人计划课题 （）
