Proceedings

• Only free water can be separated by mechanical dewatering
DS(A)
• The proper selection and preparation of polymer is required to achieve good dewatering results.
• The building of shear stable flocs by conditioning is important.
• The polymer-demand and the dewatering result depend strictly on quality of polymer preparation. Mostly the maturing time is disregarded.
• By measuring viscosity of the polymer solution the maturing time can be determined. The time of utilization depends on pH and polymer-concentration.
• It will be recommended to prepare polymer solution for 45 min and use the solution during 4 hours.
• For polymer-preparation 2-Chamber-Batch-Systems will be recommended
• Check concentration of polymer-solution frequently by measuring DS
• Check polymer-consumption 4 time a year and document operating data accurate.