Improved calcium sulfate recovery from a reverse osmosis retentate using eutectic freeze crystallization

• Published in: Water science and technology Vol. 67; no. 1; pp. 139 - 146
• Main Authors: RANDALL, D. G, MOHAMED, R, NATHOO, J, ROSSENRODE, H, LEWIS, A. E
• Format: Journal Article
• Language: English
• Published: London International Water Association 01.01.2013; IWA Publishing
• Subjects: Applied sciences; Calcium; Calcium sulfate; Calcium Sulfate - chemistry; Crystallization; Drinking water and swimming-pool water. Desalination; Eutectic temperature; Exact sciences and technology; Feasibility studies; Freezing; Low temperature; Osmosis; Pollution; Recovery; Reverse osmosis; Rivers; Salts; Scaling; Sulfates; Thermodynamics; Waste Disposal, Fluid - methods; Water - chemistry; Water Purification - methods; Water reuse; Water treatment and pollution; Yield; Membrane separation; Sulfur compounds; Water treatment; environment; separations; Desalination; Crystallization; eutectic freeze crystallization; Reverse osmosis; calcium sulfate; Sulfates

A novel low temperature crystallization process called eutectic freeze crystallization (EFC) can produce both salt(s) and ice from a reverse osmosis (RO) stream by operating at the eutectic temperature of a solution. The EFC reject stream, which is de-supersaturated with respect to the scaling compo...