A comparison of struvite precipitation thermodynamics and kinetics modelling techniques
Natividad Marin, Leynard, Burns, Max, and Schneider, Phil (2023) A comparison of struvite precipitation thermodynamics and kinetics modelling techniques. Water Science & Technology, 87 (6). pp. 1393-1422.
|
PDF (Published Version)
- Published Version
Available under License Creative Commons Attribution. Download (932kB) | Preview |
Abstract
Solution thermodynamics and kinetic modelling applied to struvite crystallisation–precipitation were reviewed from diverse references to determine proximity between predicted and cited experimental measurements. These simulations show the expected variability range of struvite saturation calculation when only limited solution compositional information is given, showing acceptable agreement between predicted and experimental struvite mass. This work also compares results from struvite crystallisation kinetic studies on liquid phase species depletion, crystallisation induction time, primary nucleation, secondary nucleation, crystal growth, and crystal aggregation. Large inconsistencies between reported kinetics were observed in many scenarios. Variations in species depletion models highlighted that they are only suitably applied to the specific system from which they were regressed. Spontaneous primary nucleation was predicted to occur in the range of SI = 0.237–0.8. Predicted primary nucleation rates vary over at least 10 orders of magnitude (depending on supersaturation) because of uncertainties in interfacial tension and maximum achievable nucleation rate. Secondary nucleation rates are more agreeable, varying over approximately two orders of magnitude. Growth rates varied over five orders of magnitude due to variations in experimental conditions. Aggregation rates are not thoroughly examined enough to make any inferences.
Item ID: | 73697 |
---|---|
Item Type: | Article (Research - C1) |
ISSN: | 1996-9732 |
Keywords: | aggregation, growth, kinetic, nucleation, struvite, recovery, thermodynamics |
Copyright Information: | © 2023 The Authors. This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (CC BY 4.0), which permits copying, adaptation and redistribution, provided the original work is properly cited (http://creativecommons.org/licenses/by/4.0/). |
Date Deposited: | 06 Jun 2023 06:35 |
FoR Codes: | 40 ENGINEERING > 4004 Chemical engineering > 400410 Wastewater treatment processes @ 50% 40 ENGINEERING > 4004 Chemical engineering > 400403 Chemical engineering design @ 50% |
SEO Codes: | 24 MANUFACTURING > 2401 Agricultural chemicals > 240102 Chemical fertilisers @ 100% |
Downloads: |
Total: 92 Last 12 Months: 24 |
More Statistics |