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ID 113780
Author
Wakisaka, Kenji Tokushima University
Imanishi, Kenta Tokushima University
Liu, Jhy-Chern National Taiwan University of Science and Technology
Keywords
Incineration Ash
Chicken Manure
Recovery of Phosphorus
Phosphate Rock Equivalent
Content Type
Journal Article
Description
In order to obtain calcium phosphates - a phosphate rock equivalent - from the incineration ash of chicken manure, which is obtained from power generation systems that use the manure for fuel, incineration ash was treated with an aqueous solution of nitric acid to elute phosphorus. By using 0.3 M of HNO3, most of the phosphorus could be eluted from 1.0 g of ash within 0.1 h. Compared with the composted chicken manure that was previously examined in our laboratory, the concentration of HNO3 was increased for this session of elution. Using the incineration ash of chicken manure made it possible to remove inorganic species at a lower boiling or sublimation temperature, and organic species by calcination in the power generation system. Compared with composted chicken manure, the concentrations of phosphorus contained in the incineration ash and the nitric acid extract were higher in the incineration ash. XRD analysis showed that the obtained nitric acid extract could be treated with aqueous NH3 to form a precipitation of poorly-crystallized calcium hydroxyapatite (Ca10(PO4)6(OH)2), which is one of main components in phosphate rock. In order to confirm the formation and purity of calcium phosphate species, the precipitation calcination was conducted at 1,078 K for 5 h. XRD revealed that the calcined solid was tricalcium phosphate, and no contamination was evident. These results reveal that a phosphate rock equivalent could be easily obtained from the incineration ash of chicken manure, which means that approximately 14% of the phosphate rock that is currently being imported into Japan could be replaced by this product.
Journal Title
Journal of Chemical Engineering of Japan
ISSN
00219592
NCID
AA00709658
Publisher
The Society of Chemical Engineers, Japan
Volume
52
Issue
9
Start Page
778
End Page
782
Published Date
2019-09-20
Rights
Copyright © 2019 The Society of Chemical Engineers, Japan
EDB ID
DOI (Published Version)
URL ( Publisher's Version )
FullText File
language
eng
TextVersion
Author
departments
Science and Technology