不同改性剂改善污泥土工性质的比较研究  

Modification of sewage sludge geotechnical properties by using various solid modifiers

作　　者：赵由才[1] 张华[1] 黄仁华 周海燕 秦峰 韩丹[1] 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092 [2]上海环境集团公司,上海200092

出　　处：《环境污染与防治》2010年第1期35-39,共5页Environmental Pollution & Control

基　　金：教育部2005年重大专项(No.305005);上海市科委2008年重点项目(No.08DZ1202802)

摘　　要：选择了泥土、矿化垃圾、粉煤灰和建筑垃圾4种改性剂改性城市污水处理厂污泥(以下简称污泥)。结果表明:(1)随着4种改性剂与污泥的混合比增大,混合物含水率降低。(2)当混合比为0.7(质量比)时,各种混合物的抗压强度都达到50kPa的填埋要求;当混合比为0.3～1.0时,混合物的抗压强度随着混合比的增大呈指数形式增大;比较4种改性剂对抗压强度的增大能力,粉煤灰最强,建筑垃圾次之,泥土和矿化垃圾较弱。(3)在50kPa预压力下,混合物要达到不小于25kPa的抗剪强度,泥土与污泥最小混合比为1.0,矿化垃圾与污泥最小混合比为1.0,粉煤灰与污泥最小混合比为0.7,建筑垃圾与污泥最小混合比为0.7。(4)除加泥土的混合物外,混合物压缩系数随着混合比的增大呈总体下降趋势。(5)粉煤灰除臭效果最好,矿化垃圾次之,建筑垃圾较差,泥土最差。The batch experiments were conducted to modify the geotechnical properties of sewage sludge by 4 soil modifier （coal ash,construction wastes, soil and aged refuse）. The modifier and sewage sludge was mixed with mass ratio of 0.1,0. 3,0. 5,0. 7,1. 0 and 1.5, the effect of mixing ratio on geotechnical properties of sewage sludge was investigated. The results showed that the moisture of sludge decreased with increasing of mixing ratios;when the modifier and sludge mixed with ratio of 0.7 ,the obtained sludge had the compression strength over 50 kPa;the minimum ratio for soil,aged refuse mixing,coal ash and construction waste with sludge were 1.0,1.0,0.7 and 0.7 separately,in order to meet the vane shear strength over 25 kPa;compression coefficients of modified sludge under 50 kPa was tested, the higher mixing ratio resulted lower compression coefficients of modified sludge;among the 4 soil modifier,coal ash presented best ability for odour removal,which was followed by aged refuse, construction wastes and soil.

关 键 词：改性剂 泥土 矿化垃圾 粉煤灰 建筑垃圾 

分 类 号：X703[环境科学与工程—环境工程] TQ325.304[化学工程—合成树脂塑料工业]