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Journal of Dairy Science Vol. 79 No. 4 710-716
© 1996 by American Dairy Science Association ®
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Potential for Stainless Steel Microfiltration Processing to Reduce Effluent from a Fluid Milk and Ice Cream Processing Plant

V. Yip 1, S. D. Arntfield 1, and A. W. Hydamaka 1

1 Department of Food Science, University of Manitoba, Winnipeg, MB, Canada R3T 2N2

The use of a porous stainless steel micromembrane system was investigated as a means of chemical recovery and effluent pretreatment for the dairy industry. With a volume recovery of 89%, the chemical solutions recovered from the permeate stream, such as caustic, chlorinated alkaline, and acidic solutions, retained their strengths. Because of the reduction in suspended solids, protein, and fat, the chemical solutions could be reused. The system also effectively removed suspended solids, fat, and protein from dairy products and from combined dairy effluents, corresponding to a 74 to 76% removal of chemical oxygen demand from combined dairy effluents. The use of coagulation and flocculation or UF prior to or after the system did not provide additional benefits in chemical oxygen demand or solids removal.

Key Words: microfiltration • chemical recovery • dairy effluent treatment • chemical oxygen demand reduction

Submitted on June 19, 1995
Accepted on December 15, 1995






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Copyright © 1996 by the American Dairy Science Association ®.