V. Yip et al., POTENTIAL FOR STAINLESS-STEEL MICROFILTRATION PROCESSING TO REDUCE EFFLUENT FROM A FLUID MILK AND ICE-CREAM PROCESSING PLANT, Journal of dairy science, 79(4), 1996, pp. 710-716
The use of a porous stainless steel micromembrane system was investiga
ted 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 alkal
ine, and acidic solutions, retained their strengths. Because of the re
duction 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 effluent
s, 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.