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| 하수슬러지 소각 비산재를 이용한 입상비료 조립 및 특성분석 |
| 김성범, 이원태 |
| 금오공과대학교 환경공학과 |
| Characterization of Granular Fertilizer Produced by Fly Ash from a Sewage Sludge Incinerator |
| Seong-beom Kim, Wontae Lee |
| Department of Environmental Engineering, Kumoh National Institute of Technology |
| Corresponding author |
Wontae Lee ,Tel: 054-478-7636, Fax: 054-478-7859, Email: wtlee@kumoh.ac.kr
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Received: March 28, 2016; Revised: October 19, 2016; Accepted: October 24, 2016. Published online: October 31, 2016. |
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| ABSTRACT |
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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. |
| Key Words:
Sewage Sludge, Fly Ash, Granular Fertilizer, Recycling |
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