Nucleation and growth kinetics of struvite crystallization

Mehta, Chirag and Batstone, Damien J. (2013) Nucleation and growth kinetics of struvite crystallization. Water Research, 47 8: 2890-2900. doi:10.1016/j.watres.2013.03.007


Author Mehta, Chirag
Batstone, Damien J.
Title Nucleation and growth kinetics of struvite crystallization
Journal name Water Research   Check publisher's open access policy
ISSN 0043-1354
1879-2448
Publication date 2013-05-01
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.watres.2013.03.007
Open Access Status DOI
Volume 47
Issue 8
Start page 2890
End page 2900
Total pages 11
Place of publication London, United Kingdom
Publisher I W A Publishing
Language eng
Subject 2302 Ecological Modelling
2312 Water Science and Technology
2311 Waste Management and Disposal
2310 Pollution
Abstract Struvite crystallization technology is being widely applied in full-scale due to a surge in nutrient demand and phosphate price increases. Past investigations on struvite crystallization focused on process efficiency and thermodynamics, and less on kinetics, while mainly using fluidized bed type crystallizer. In this work, nucleation and growth kinetic data were measured using stirred vessel. The primary and secondary nucleation was measured in synthetic wastewater, and crystal growth in digested supernatant. The measured kinetic data was correlated with solution supersaturation. The dependence of growth rate on relative supersaturation in the digested was higher compared to synthetic wastewater. The crystal polymorph in synthetic wastewater and real wastewater was comparable. Products from the growth studies showed narrow size distribution and favorable separation characteristics. The secondary nucleation rate showed second order dependence on relative supersaturation. The nucleation induction time decreased with an increase in supersaturation ratio with a clear distinction between homogenous and heterogenous primary nucleation. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.
Formatted abstract
Struvite crystallization technology is being widely applied in full-scale due to a surge in nutrient demand and phosphate price increases. Past investigations on struvite crystallization focused on process efficiency and thermodynamics, and less on kinetics, while mainly using fluidized bed type crystallizer. In this work, nucleation and growth kinetic data were measured using stirred vessel. The primary and secondary nucleation was measured in synthetic wastewater, and crystal growth in digested supernatant. The measured kinetic data was correlated with solution supersaturation. The dependence of growth rate on relative supersaturation in the digested was higher compared to synthetic wastewater. The crystal polymorph in synthetic wastewater and real wastewater was comparable. Products from the growth studies showed narrow size distribution and favorable separation characteristics. The secondary nucleation rate showed second order dependence on relative supersaturation. The nucleation induction time decreased with an increase in supersaturation ratio with a clear distinction between homogenous and heterogenous primary nucleation.
Keyword Engineering, Environmental
Environmental Sciences
Water Resources
Engineering
Environmental Sciences & Ecology
Water Resources
ENGINEERING, ENVIRONMENTAL
ENVIRONMENTAL SCIENCES
WATER RESOURCES
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID UQ00046
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
Advanced Water Management Centre Publications
 
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Created: Wed, 10 Apr 2013, 02:33:56 EST by Mr Chirag Mehta on behalf of Advanced Water Management Centre