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: 9th IWA Symposium on Systems Analysis and Integrated Assessment, 14 - 17 June 2015, Gold Coast, QLD, Australia.

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 Type:	Conference Item
URI:	http://researchrepository.murdoch.edu.au/id/eprint/38217

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