Kinetics of struvite precipitation in synthetic biologically treated swine wastewaters

An experimental design was set up to understand the influence of five process parameters on the kinetics of struvite precipitation in synthetic swine wastewaters. The responses studied were the kinetics of phosphorus (P) removal, the struvite precipitation rate and the dissolution rate of amorphous...

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Published in:Environmental technology 2014-05, Vol.35 (10), p.1250-1262
Main Authors: Capdevielle, Aurélie, Sýkorová, Eva, Béline, Fabrice, Daumer, Marie-Line
Format: Article
Language:English
Subjects:
amorphous calcium phosphate
Animals
Applied sciences
Bioreactors
Calcium phosphate
calcium phosphates
Chemical Precipitation
Constraining
coprecipitation
Crystals
Dissolution
Environmental Sciences
environmental technology
Exact sciences and technology
experimental design
General purification processes
Hydrogen-Ion Concentration
Kinetics
magnesium ammonium phosphate
Magnesium Compounds - chemistry
Magnesium Oxide
mixing
Models, Statistical
Phosphates - chemistry
phosphorus
Pollution
Precipitation
statistical models
Struvite
Swine
swine wastewaters
Waste Management
Waste water
Waste Water - chemistry
wastewater
Wastewaters
Water treatment and pollution
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Sýkorová, Eva
Béline, Fabrice
Daumer, Marie-Line
description An experimental design was set up to understand the influence of five process parameters on the kinetics of struvite precipitation in synthetic swine wastewaters. The responses studied were the kinetics of phosphorus (P) removal, the struvite precipitation rate and the dissolution rate of amorphous calcium phosphates (ACP). The kinetic study showed that the P-removal was complete in less than 1 h and was influenced positively by the added MgO. The precipitation of struvite with MgO was confirmed to follow a first-order kinetic. This study showed that ACP co-precipitated with struvite during the first 30 min. Afterwards, ACP dissolved to maintain the phosphates balance limiting the struvite growth. An initial Mg:Ca>1.5 induced a complete dissolution of ACP in 1 h. Another experiment was conducted and it validated the results of the statistical model. This experiment also determined that 7–10 h was the best time to recover large crystals. After 10 h, the crystals were broken by stirring.
doi_str_mv 10.1080/09593330.2013.865790
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1479-487X
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source Taylor and Francis Science and Technology Collection
subjects amorphous calcium phosphate
Animals
Applied sciences
Bioreactors
Calcium phosphate
calcium phosphates
Chemical Precipitation
Constraining
coprecipitation
Crystals
Dissolution
Environmental Sciences
environmental technology
Exact sciences and technology
experimental design
General purification processes
Hydrogen-Ion Concentration
Kinetics
magnesium ammonium phosphate
Magnesium Compounds - chemistry
Magnesium Oxide
mixing
Models, Statistical
Phosphates - chemistry
phosphorus
Pollution
Precipitation
statistical models
Struvite
Swine
swine wastewaters
Waste Management
Waste water
Waste Water - chemistry
wastewater
Wastewaters
Water treatment and pollution
title Kinetics of struvite precipitation in synthetic biologically treated swine wastewaters
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