Potential of freezing in wastewater treatment: soluble pollutant applications
O Lorain1, P Thiebaud, E Badorc
1Laboratoire d'Ingénierie des Procédés de l'Environment (EA833), Département de Génie des Procédés Industriels, Institut National des Sciences Appliquées, Avenue de Rangueil, 31077 Toulouse, France. olivier.lorain@insa-tlse.fr
Abstract:
When wastewater containing only soluble pollutants is frozen gradually, ice crystals grow from the pure water only, while pollutants are rejected into the liquid phase thus increasing their concentration. In this way, pure water can be removed from various wastewaters. Two kinds of wastewater were studied: synthetic wastewater containing water and one or more soluble pollutants, and industrial wastewaters (urban wastewater and cutting oil wastewater). In most cases, separation efficiency close to 100% was achieved. A large range of pollutant concentrations was studied in order to determine the limits of freezing separation.
More Related Videos
08:09Wastewater Irrigation Impacts on Soil Hydraulic Conductivity: Coupled Field Sampling and Laboratory Determination of Saturated Hydraulic Conductivity
Published on: August 19, 2018
06:35Implementation of a Hyperbolic Vortex Plasma Reactor for the Removal of Micropollutants in Water
Published on: July 25, 2025
Related Concept Videos
Freezing Point Depression and Boiling Point Elevation
The boiling point of a liquid is the temperature at which its vapor pressure is equal to ambient atmospheric pressure. Since the vapor pressure of a solution is lowered due to the presence of nonvolatile solutes, it stands to reason that the solution’s boiling point will subsequently be increased. Vapor pressure increases with temperature, and so a solution will require a higher temperature than will pure solvent to achieve any given vapor pressure, including one...
Factors Affecting Solubility
Colloidal precipitates
Freezing Point Depression and Boiling Point Elevation
Microbial Wastewater Treatment
Biological Treatment of Effluent and Waste Water
