NDLI: Reuse of dewatered sewage sludge conditioned with skeleton builders as landfill cover material

Content Provider	Springer Nature Link
Author	Mao, W. Yang, J. K. Chen, J. Y. Li, Y. L. Liu, J. W. Liu, H. Shi, Y. F. Li, Y. He, S.
Copyright Year	2013
Abstract	High water and organic content of sewage sludge constricts its reuse and disposal. It is often necessary to solidify/stabilize the dewatered sludge with solidifying agents before landfill disposal. In this study, the sewage sludge was conditioned with skeleton builders, i.e., fly ash and lime combined with ferric chloride for the purpose of improving the dewatering efficiency. The dewatered sewage sludge was then directly reused as landfill cover materials since the skeleton builders also play a role in solidification of sludge. The geotechnical properties of the dewatered sewage sludge were investigated. The results show that the plasticity index of the dewatered sludge increases compared to that of the dewatered sludge without any conditioner, and the permeability coefficient changes from 10$^{−8}$ to 10$^{−5}$ cm s$^{−1}$. Furthermore, the strength of specimens increase with curing days. Microstructure analyses reveal that the main hydrated products are calcium silicate hydrate and ettringite, which contribute to the solidification/stabilization of the dewatered sludge. The results indicate that the dewatered sewage sludge conditioned with skeleton builders can be used as landfill covers. This study provides an alternative for traditional sewage sludge treatment and disposal.
Starting Page	233
Ending Page	240
Page Count	8
File Format	PDF
ISSN	17351472
Journal	International Journal of Environmental Science & Technology
Volume Number	11
Issue Number	1
e-ISSN	17352630
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-02-19
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ecotoxicology Disposal Water Management Solidification Waste Water Technology Aquatic Pollution Environment Geotechnical properties Water Pollution Control Sludge dewatering Environmental Chemistry Environmental Science and Engineering Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Environmental Engineering Agricultural and Biological Sciences

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Reuse of dewatered sewage sludge conditioned with skeleton builders as landfill cover material

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