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Study on emulsion stability for the treatment of industrial effluents containing emulsions

Grant number: 10/20376-7
Support type:Scholarships in Brazil - Doctorate (Direct)
Effective date (Start): March 01, 2011
Effective date (End): June 30, 2015
Field of knowledge:Engineering - Chemical Engineering - Chemical Process Industries
Principal Investigator:Roberto Guardani
Grantee:Cristhiane Assenhaimer Takahashi
Home Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil


The project consists of a study on emulsion stability and demulsification conditions, applied to metal working fluids, aiming at the treatment of effluents from metal working industrial processes. The plan involves lab scale experiments with emulsions containing different constituents and formulations, with the application of optical techniques like spectrophotometry and light scattering, followed by data treatment in order to fit models for estimating droplet size distribution and stability regions. Based on the results, demulsification tests will be carried out in order to establish the most adequate conditions to handle effluent emulsions. Assuming that the oil phase can be reprocessed, the aim in this step is to identify adequate processes for removing organic contaminants and dissolved ions from the aqueous phase. The project topic lies within the scope of a joint project between USP and the University of Bremen, Germany, carried out within the BRAGECRIM program (Brazilian German Collaborative Research Initiative in Manufacturing). The project entitled Emulsion Process Monitor in Metalworking Processes, coordinated by Prof. Roberto Guardani (USP) and Prof. Udo Fritsching (Univ. Bremen) is aimed at developing an optical sensor for monitoring emulsion properties and to study the stability and flow characteristics of emulsions of industrial interest. (AU)