重金属疏浚污泥快速脱水固稳化技术试验  

Experimental on a New Technology for Rapid Dewatering and Solidification and Stabilization Technology of Heavy Metal Contaminated Dredged Sediment

作　　者：程爱华[1] 彭卫东 魏汝明[1] 陈训龙 李亮辉 CHENG Aihua;PENG Weidong;WEI Ruming;CHEN Xunlong;LI Lianghui(Jinan Geotechnical Investigation and Surveying Research Institute,Jinan 250013,China;Jinan Jihua Gas Co,Jinan 250306,China;Guangdong Traffic Safety Protection Engineering Technology Research Center,Shenzhen Cansinga Technology Co Ltd,Shenzhen 518102,China;Shenzhen Ceotechnical Investigation&Surveying Institute(Group)Co Ltd,Shenzhen 518028,China)

机构地区：[1]济南市勘察测绘研究院,山东济南250013 [2]济南济华燃气有限公司,山东济南250306 [3]深圳市乾行达科技有限公司广东省交通安全防护工程技术研究中心,广东深圳518102 [4]深圳市勘察测绘院(集团)有限公司,广东深圳518028

出　　处：《土木工程与管理学报》2024年第4期37-43,共7页Journal of Civil Engineering and Management

基　　金：广西省防灾减灾与结构安全重点实验室开放课题项目(2019ZDK045);水利部土石坝破坏机理与防控技术重点实验室开放研究基金(YK321004)。

摘　　要：针对我国疏浚污泥处置低效且成本高以及工业固废——高炉矿渣(GGBS)综合利用率低的问题,提出了一种疏浚污泥快速脱水固化稳定化新技术(PHDVPSS),并通过试验系统性地对新技术的实用可行性进行了分析。同时,进一步分析了GGBS对新技术的影响性。分析表明:该技术在脱水效率、固化强度和毒性浸出方面,较传统技术均具有明显优势。仅3 d时间可将底泥含水率降低近50%,90 d处理样品的UCS是传统方法处理的近11倍,而浸出浓度仅约为传统方法的2/3。GGBS添加量增加对新技术处理效果具有显著提高作用,采用30%GGBS时,仅4 d时间可将污泥含水率降低近2/3,在90 d时,VP-GM-3的UCS是VP-GM-1的近12倍,而浸出浓度仅为VP-GM-1的1/3左右。In view of the low efficiency and high cost of disposal of dredged contaminated sediment and the low utilization of industrial solid waste—ground granulated blastfurnace slag(GGBS),a new integrated technology was put forward for rapid dewatering and solidification and stabilization of heavy metal contaminated dredged sediment with a high-water content by GGBS(denoted as PHDVPSS).And then,the practical feasibility of this PHDVPSS technology was verified and analyzed by series of tests.On this basis,the effect of GGBS on the treatment effect was further studied.The results show that:compared with the traditional technology,this PHDVPSS technology has obvious advantages in dewatering efficiency,curing strength and toxic leaching.Only in 3 days,the water content of sediment can be reduced by nearly 50%,the UCS of 90-day treated samples was 11 times higher than that of the traditional method,while the leaching concentration was only about 2/3 of that of the traditional method.The increase of GGBS addition can significantly improve the treatment effect of the new technology.When 30%GGBS is used,the water content of sediment can be reduced by 2/3 in only 4 days.At 90 days,the UCS of VP-GM-3 is nearly 12 times that of VP-GM-1,while the leaching concentration is only about 1/3 of VP-GM-1.

关 键 词：重金属污染 疏浚污泥 真空脱水 固化稳定化 GGBS 

分 类 号：X53[环境科学与工程—环境工程] X703