Modelling, design and evaluation of a continuous Poiseuille flow struvite seed crystallizer

Burns, M., Schneider, P., and Natividad-Marin, L. (2015) Modelling, design and evaluation of a continuous Poiseuille flow struvite seed crystallizer. In: Abstracts from the 9th IWA Symposium on Systems Analysis and Integrated Assessment. From: Watermatex 2015: 9th IWA Symposium on Systems Analysis and Integrated Assessment, 14-17 June 2015, Gold Coast, QLD, Australia. (Unpublished)

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Abstract

Poiseuille flow combined with rapid mixing provides a low pressure drop method of continuous seed production. Magnitude and variance of distribution width and volume median diameter (D[50]) measured in line (IL) increase with initial saturation index (SI), whereas filtered and re-suspended samples show little change. These effects are greater for the impinging jet (IJ) mixer than the Roughton (R) mixer. This illustrates that incomplete mixing before nucleation promotes formation of unstable aggregates, creating a more variable product. The IJ mixer also produced a lower phosphorus recovery, which may be attributed to SI gradients caused by incomplete mixing. Differences in mass recovery measurements indicate that scaling is an issue and needs to be further investigated.

Item ID: 40085
Item Type: Conference Item (Presentation)
Keywords: Poiseuille, Roughton, struvite
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Date Deposited: 25 Aug 2015 03:13
FoR Codes: 09 ENGINEERING > 0907 Environmental Engineering > 090702 Environmental Engineering Modelling @ 50%
09 ENGINEERING > 0904 Chemical Engineering > 090409 Wastewater Treatment Processes @ 50%
SEO Codes: 96 ENVIRONMENT > 9611 Physical and Chemical Conditions of Water > 961199 Physical and Chemical Conditions of Water not elsewhere classified @ 50%
96 ENVIRONMENT > 9699 Other Environment > 969999 Environment not elsewhere classified @ 50%
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