期刊
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
卷 46, 期 -, 页码 62-67出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2016.10.016
关键词
Acid pretreatment; Ca elution; Phosphorus recovery; Sewage sludge ash
资金
- Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2015R1D1A1A01060589]
- Hallym University Research Fund [HRF-201604-006]
- National Research Foundation of Korea [2015R1D1A1A01060589] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Phosphorus (P) is recovered from sewage sludge ash (SSA) by selective HCl elution of Ca. Leaching and rearrangement of P were very fast and the amounts of leaching and recombination of P depend strongly on pH. pH control at 4.0 obtained selective elution ratio (Ca(%)/P(%)) of 20 by recombination of P to Al in SSA residue while it was 5.6 without pH control. XRD and element mass balance showed that Ca-P in the raw SSA was converted to Al-P complex during the acid pretreatment. (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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