Phosphorus recovery from wastewater and sludge
College
Gokongwei College of Engineering
Department/Unit
Chemical Engineering
Document Type
Conference Proceeding
Source Title
MATEC Web of Conferences
Volume
268
Publication Date
2019
Abstract
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).
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Recommended Citation
Damalerio, R. G., Belo, L. P., Orbecido, A. H., Pausta, C. J., Promentilla, M. B., Razon, L. F., Eusebio, R. P., Saroj, D., & Beltran, A. B. (2019). Phosphorus recovery from wastewater and sludge. MATEC Web of Conferences, 268 Retrieved from https://animorepository.dlsu.edu.ph/faculty_research/14185
Disciplines
Chemical Engineering
Keywords
Water—Phosphorus content; Phosphorus; Hydrolysis; Sewage sludge
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