Investigations on Recovering Fats from Industrial Wastes by Flotating Separation
S. Zak1, Z. Pawlak1, 2
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1Department of Technology and Chemical Engineering, University of Technology and Agriculture,
85-326 Bydgoszcz, 3 Seminaryjna Street, Poland
2Utah State Department of Health, Environmental Chemistry, 46 n. Medical Drive,
Salt Lake City, UT 84113, USA
Pol. J. Environ. Stud. 2006;15(5):819-826
Our paper presents the results of research on utilization of after-centrifugal silts (AC-silts) from processing technical fats of animal and vegetable origins. The aim of the research was to compare two methods of fat recovery from AC-silts: dispersed (induced) air flotation (IAF) and hydrogen peroxide-enhanced dispersed air flotation (OxIAF). To realize this task a flotation system was constructed, which enabled complex testing of the method and the determination of parameters essential for the process. The installation of the output up to 10.0 m3·day-1 was equipped with AC-silt storage-averaging tanks, a flotator, a centrifuge for separating fatty fractions and a set to process after-flotation residuals. The solution permits more than 50% recovery of fats from AC-silts. The residuals, mainly water-protein suspensions, may be considered as substrates to produce material of fertilizer properties.
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