Phosphorus recovery from wastewater and sludge

Damalerio Regina G.; Belo Lawrence P.; Orbecido Aileen H.; Pausta Carla Mae J.; Promentilla Michael Angelo B.; Razon Luis F.; Eusebio Ramon Christian P.; Saroj Devendra; Beltran Arnel B.

doi:10.1051/matecconf/201926806016

MATEC Web of Conferences (Jan 2019)

Phosphorus recovery from wastewater and sludge

Damalerio Regina G.,
Belo Lawrence P.,
Orbecido Aileen H.,
Pausta Carla Mae J.,
Promentilla Michael Angelo B.,
Razon Luis F.,
Eusebio Ramon Christian P.,
Saroj Devendra,
Beltran Arnel B.

Affiliations

Damalerio Regina G.: Department of Chemical Engineering, Gokongwei College of Engineering, De La Salle University
Belo Lawrence P.: Department of Chemical Engineering, Gokongwei College of Engineering, De La Salle University
Orbecido Aileen H.: Department of Chemical Engineering, Gokongwei College of Engineering, De La Salle University
Pausta Carla Mae J.: Department of Chemical Engineering, Gokongwei College of Engineering, De La Salle University
Promentilla Michael Angelo B.: Department of Chemical Engineering, Gokongwei College of Engineering, De La Salle University
Razon Luis F.: Department of Chemical Engineering, Gokongwei College of Engineering, De La Salle University
Eusebio Ramon Christian P.: Department of Chemical Engineering, University of the Philippines Los Baños
Saroj Devendra: Department of Civil and Environemental Engineering, Faculty of Engineering and Physical Sciences, University of Surrey Surrey GU2 7XH
Beltran Arnel B.: Department of Chemical Engineering, Gokongwei College of Engineering, De La Salle University

DOI: https://doi.org/10.1051/matecconf/201926806016
Journal volume & issue: Vol. 268
p. 06016

Abstract

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Wastewater and sludge are potential resource of phosphorus (P) for fertilizer production. One method of recovering phosphorus is via chemical precipitation. In the study, phosphorus was recovered from wastewater and sludge. First, hydrolysis was carried out to release the phosphorus in the sludge by the addition of 1.0M acid (sulfuric acid) or base (sodium hydroxide) solution mixed for three hours at 200 rpm. The hydrolyzed sludge was filtered, and the pH of the solution was adjusted to 9.0. Precipitation for both wastewater and hydrolyzed sludge solution was carried out using magnesium chloride hexahydrate (MgCl2•6H2O) and ammonium chloride (NH4Cl). The mixture was stirred for an hour for crystallization. Precipitates were allowed to settle for 24 hours before it was filtered and dried in an oven at 55-58oC for 24 hours. The dried sample was grinded and characterized using Fourier transform infrared spectroscopy (FTIR), x-ray fluorenscence (XRF), and scanning electron microscope with energy-dispersive x-ray spectroscopy(SEM-EDX).

Published in MATEC Web of Conferences

ISSN: 2261-236X (Online)
Publisher: EDP Sciences
Country of publisher: France
LCC subjects: Technology: Engineering (General). Civil engineering (General)
Website: http://www.matec-conferences.org

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