Value Addition of Wastewater Sludge: Future Course in Sludge Reutilization
Publication: Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management
Volume 13, Issue 1
Abstract
Sludges are inevitable products of wastewater treatment processes, which have to be managed efficiently to meet stringent laws and regulations being enforced day by day. Currently, there exist three major options for complete sludge management—control at source by process modification; improvement in handling, processing, and disposal, and reuse to produce value-added products. The source control and improvement in handling and disposal practices have been reviewed by various authors and it is actually sludge reprocessing to value-added products that holds the future key to sustainable management. Thus, the primary focus of this review is the value addition of sludge comprising recovery of different components and development of commercial products. The production of various value-added products, namely, soil amendments, construction aggregates, fuels, biotechnology products, biosorbents, and miscellaneous have been examined addressing the key issues of production method limitations, benefits, and possible field application.
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Acknowledgments
The writers are sincerely thankful to the Natural Sciences and Engineering Research Council of Canada (Grant No. NSERCA4984, NSERCSTP235071, Canada Research Chair) for financial support. The views and opinions expressed in this article are those of the writers. The writers are also thankful to the Natural Sciences and Engineering Research Council of Canada,NSERC Canadian Forestry Service, and Société de protection des forêts contre les insectes et maladies (SOPFIM) for providing a Ph.D. postgraduate scholarship to Satinder K. Brar.
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Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management
Volume 13 • Issue 1 • January 2009
Pages: 59 - 74
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© 2009 ASCE.
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Received: Mar 27, 2008
Accepted: Apr 1, 2008
Published online: Jan 1, 2009
Published in print: Jan 2009
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