Document Detail

Leaching of phosphorus from incinerated sewage sludge ash by means of acid extraction followed by adsorption on orange waste gel.
MedLine Citation:
PMID:  20131609     Owner:  NLM     Status:  MEDLINE    
Ashes from sewage sludge incineration have a high phosphorus content, approximately 8% (W/W), which indicates a potential resource of the limiting nutrient. Incineration of sewage sludge with subsequent recovery of phosphorus is a relatively new sludge treatment technique. In this article, the leaching of phosphorus by using sulfuric acid as well as hydrochloric acid by means of several batch experiments was presented. At the same time a selective recovery of phosphorus by adsorption was also discussed. The effects of acid concentration, temperature and time on extraction were studied. The phosphorus leaching increased with the increase in acid concentration and temperature. Kinetic studies showed that the complete leaching of phosphorus took place in less than 4 h. Selective adsorption of phosphorus by using orange waste gel provided a hint for recovery of this natural resource, which eventually could meet the ever-increasing requirement for phosphorus. The overall results indicated that the incinerated sewage sludge ash can be treated with acid to efficiently recover phosphorus and thus can be considered a potentially renewable source of phosphorus.
Biplob Kumar Biswas; Katsutoshi Inoue; Hiroyuki Harada; Keisuke Ohto; Hidetaka Kawakita
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of environmental sciences (China)     Volume:  21     ISSN:  1001-0742     ISO Abbreviation:  J Environ Sci (China)     Publication Date:  2009  
Date Detail:
Created Date:  2010-02-05     Completed Date:  2010-03-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100967627     Medline TA:  J Environ Sci (China)     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  1753-60     Citation Subset:  IM    
Department of Applied Chemistry, Saga University, Honjo 1, Saga 840-8502, Japan.
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MeSH Terms
Hydrochloric Acid / chemistry
Industrial Waste
Phosphorus / isolation & purification*
Sewage / chemistry*
Sulfuric Acids / chemistry
Reg. No./Substance:
0/Industrial Waste; 0/Sewage; 0/Sulfuric Acids; 7647-01-0/Hydrochloric Acid; 7664-93-9/sulfuric acid; 7723-14-0/Phosphorus

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