METHOD OF SEPARATING A SURFACTANT FROM A LIQUID

摘要

The present invention relates to a method of separating a surfactant from a liquid, such as a wastewater stream from an industrial laundry. In accordance with the invention, the liquid is cooled to below the Krafft temperature of the surfactant and subjected to centrifugal forces for the separation of crystalline particles that have been formed. Separation is preferably performed with the aid of a hydrocyclone (Fig.).