Development of a novel phosphorus recovery system using incinerated sewage sludge ash (ISSA) and phosphorus-selective adsorbent.

Autor: Yu X; School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China; Graduate School of Agriculture, Ehime University, Tarumi 3-5-7, Matsuyama, Ehime 790-8566, Japan. Electronic address: yu.xiaolong@hotmail.com., Nakamura Y; Ehime Prefectural Institute of Public Health and Environmental Science, 8-234, Sanbancho, Matsuyama, Ehime 790-0003, Japan., Otsuka M; Ehime Prefectural Institute of Public Health and Environmental Science, 8-234, Sanbancho, Matsuyama, Ehime 790-0003, Japan., Omori D; Daiki Axis Co., Ltd., 1-9-1, Misawa, Matsuyama, Ehime 791-8022, Japan., Haruta S; Graduate School of Agriculture, Ehime University, Tarumi 3-5-7, Matsuyama, Ehime 790-8566, Japan. Electronic address: haruta@agr.ehime-u.ac.jp.
Jazyk: angličtina
Zdroj: Waste management (New York, N.Y.) [Waste Manag] 2021 Feb 01; Vol. 120, pp. 41-49. Date of Electronic Publication: 2020 Dec 04.
DOI: 10.1016/j.wasman.2020.11.017
Abstrakt: Phosphorus is an essential nutrient but faces foreseeable resource depletion. The incinerated sewage sludge ash (ISSA) is a promising source for recovering phosphorus. In this study, we proposed a new system for recovering phosphorus from ISSA. This innovative system uses phosphorus-selective adsorbent to purify phosphorus from the ISSA acid leachate. Laboratory scale batch and column tests were performed to demonstrate the feasibility of the system. Note that >70% of phosphorus in ISSA can be recovered as a high-purity recovery product. The product showed a structure similar to hydroxyapatite (Ca 5 (PO 4 ) 3 OH). The total amount of Ca, P, and O in the product was above 90 wt%. The content of trace elements (As, Cd, Cr, and Pb) in the product was below the fertilizer limits, suggesting that the health and environmental risks of using fertilizer in agriculture are negligible. The expected costs of the system were estimated. The reusability of the adsorbent can reduce the operational costs to a satisfactory level. This study provides a practical alternative for recovering phosphorus from ISSA.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2020 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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