Phosphorus recovery as induced struvite from deep dewatered liquors using magnesium chloride as a magnesium source

The phosphorus recoveries in municipal wastewater treatment plants (WWTPs) are in much demand as the price of phosphate rock are increased from the last decade. Due to the increase in pollution levels of the sewage sludge, it is difficult to use sewage sludge directly as fertilizers in agricultural...

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Bibliographic Details
Published inIOP conference series. Materials Science and Engineering Vol. 561; no. 1; pp. 12010 - 12014
Main Authors Rashmi, H R, Devatha, C P
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.10.2019
Subjects
Agrochemicals
Crystallizations
Fertilizers
Magnesium chloride
Phosphorus
Pollution levels
Recovery
Sewage sludge
Sludge
Struvite
Wastewater treatment
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Summary:The phosphorus recoveries in municipal wastewater treatment plants (WWTPs) are in much demand as the price of phosphate rock are increased from the last decade. Due to the increase in pollution levels of the sewage sludge, it is difficult to use sewage sludge directly as fertilizers in agricultural fields. The present study aimed to work on the recovery of phosphorus from the deep dewatered liquors in a laboratory, batch test mode. Experiments were conducted to identify the initial characteristics of sludge and for recovery analysis, by varying the phosphorus and Magnesium (Mg:P) molar ratio. Characterization studies were performed by SEM and FTIR for confirmation of struvite formation. Results obtained revealed that recovery is 94% of the incoming phosphorus.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/561/1/012010