Chitosan-based coagulating agents for treatment of cheddar cheese whey.
Chitosan-Polyanion (Chi-Pol) complexes were used as coagulating agents for treating Cheddar cheese whey. Complexation and coagulation time played a significant role in adsorption, whereas polymer concentration was significant only for chitosan-alginate complexes. Complexes of chitosan with alginate (ALG), pectin (PEC), and carrageenan (CAR) used at 30 mg complex/L whey showed turbidity reductions of 40-43% and 65-72% after 1 and 39 h, respectively. At 10 mg/L, the percent reduction in turbidity after 1 and 39 h were 35-39% and 61-64%, respectively. No significant differences in turbidity reduction (P > 0.05) were observed when using complexes at different Chi-Pol monomeric mixing ratios (MR) except for Chi-Alg at 30 mg/L, wherein reduction at 0.2 was higher than 0.8 MR. Also, UV-vis spectroscopy suggested the preference of this complex for the absorption of specific whey protein fractions. This study successfully demonstrated the effectiveness of Chi-Pol complexes in flocculation of suspended solid wastes in cheese whey with over 70% protein recovery.
Savant
V D
VD
Department of Food Science & Technology, Oregon State University, Corvallis, Oregon 97331, USA.
Torres
J A
JA
D002611:Cheese / Q000032:analysis*; D002686:Chitin / Q000031:analogs & derivatives / Q000737:chemistry*; D048271:Chitosan; D006863:Hydrogen-Ion Concentration; D013056:Spectrophotometry, Ultraviolet
D002686:Chitin; D048271:Chitosan