Innovative Procedure for Automatic Measurement of Specific Filtration Resistance and Electrostatic Charge, 1994 Papermakers Conference Proceedings

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A technique to monitor streaming potential and Specific Filtration Resistance simultaneously in a continuous on-line manner has been developed. The technique has been validated on a hardwood furnish where the Specific Filtration Resistance and Charge were varied by refining and the application of a high charge density low molecular weight polymer. The techniques performed as anticipated. The Specific Filtration Resistance was compared to a maximum drainage parameter and against Schopper Riegler Freeness. All approaches track the observe trends but Specific Filtration Resistance seems to be more sensitive. Specific Filtration Resistance also has a theoretical basis and can be used to predict drainage on the paper machine. It is time for the paper industry to adapt this new fundamental parameter to monitor drainage and relegate freeness to a role of historical significance.