Subventions et des contributions :

Subvention ou bourse octroyée s'appliquant à plus d'un exercice financier (2017-2018 à 2018-2019).

The minimization of phosporous discharge from wastewater streams into the environment is an increasinglyx000D
important consideration for municipalities in Canada and throughout the world. Phosphorous discharge intox000D
streams, rivers, and lakes is one of the main drivers of eutrophication of these water bodies, where the presencex000D
of high levels of biological nutrients results in increased growth of plants and algae. This increase subsequentlyx000D
results in depletion of oxygen levels in water bodies which has devastating effects on fish and overallx000D
biodiversity within aquatic ecosystems. Removal of phosphorous from wastewater is thus a key area ofx000D
research and development in Canadax000D
Ostara Nutrient Recovery Inc. (Ostara) has developed technologies which enable the recovery of phosphorousx000D
from wastewater streams in a way such that the recovered phosphorous containing solids (struvite) may be usedx000D
as a slow-release fertilizer. Ostara's core technology is the Pearl® fluidized bed reactor, is able to recover up tox000D
50% of phosphorous from a wastewater treatment plant and outputs (from the process) phosphorous-richx000D
fertilizer production, in a form ready for distribution. At the heart of this technology is a complex multiphasex000D
fluidized crystallization process where polydisperse (struvite) solid particles are dispersed in ax000D
multi-component liquid phase (wastewater).x000D
Further advancement of the Ostara's Pearl reactor technology requires multiphase CFD simulations to enablex000D
resolution of the internal multiphase hydrodynamics and, simultaneously, the mass transfer resulting from thex000D
crystallization process occurring at the solid/liquid interface. This research involves the use of the "spectrum"x000D
of two-phase flow models in order to determine the most accurate one for Ostara's unique polydispersex000D
fluidized bed reactor.