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http://dx.doi.org/10.4491/KSEE.2016.38.10.574

Characterization of Granular Fertilizer Produced by Fly Ash from a Sewage Sludge Incinerator  

Kim, Seong-beom (Department of Environmental Engineering, Kumoh National Institute of Technology)
Lee, Wontae (Department of Environmental Engineering, Kumoh National Institute of Technology)
Publication Information
Journal of Korean Society of Environmental Engineers / v.38, no.10, 2016 , pp. 574-579 More about this Journal
Abstract
This study assessed feasibility of making granular fertilizer with fly ash from a sewage sludge incinerator in Korea. Composition, characteristics, strength, and heavy metal contents of the granular fertilizers were investigated. Due to its high contents of phosphorus, fly ash from a sewage sludge incinerator could be used to make fertilizers. Granulation rates (2-4 mm granules) over 80% could be achieved as the fly ash contents were 15% or less of the fertilizer. Leaching tests of the fertilizers, based upon the Korean Standard Methods for Solid Wastes, showed the concentrations of heavy metals less than the risk limits. However, contents analysis of the fertilizers, based upon the Korean Standard Methods for Soils, experienced higher levels of heavy metals than the risk limits as the fly ash content exceeded 7% of the fertilizer. Thus, the fly ash needs to be added less than 7% of the fertilizer if there is no pretreatment to remove heavy metals.
Keywords
Sewage Sludge; Fly Ash; Granular Fertilizer; Recycling;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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