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ENZYME USE TO REDUCE VISCOSITY AND INCREASE RECOVERY OF SOLULE SOLIDS FROM CITRUS PULP‐WASHING OPERATIQNS
Author(s) -
BRADDOCK R. J.,
KESTERSON J. W.
Publication year - 1976
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1976.tb01106.x
Subject(s) - pulp (tooth) , chemistry , brix , food science , pulp and paper industry , chromatography , sugar , medicine , pathology , engineering
Soluble solids (SS) recovered by countercurrent washing of citrus juice pulp are concentrated by evaporation and sold primarily for use in beverage bases and other food uses. On a pilot plant scale, treatment of the finisher pulp with pectolytic enzymes resulted in increasing the yield of recoverable SS from 65–80 kg SS/ton pulp (oranges) and from 45–50 kg SS/ton (grapefruit). High viscosity of pulp‐wash liquids and other citrus processing liquids was found to be a deterrent during concentration by evaporation. Enzyme‐treated liquids were concentrated in a medium‐temperature evaporator to over 70° Brix and relative viscosities in the range of 1700–2200 centipoises; however, due to gel formation, nontreated liquids had to be pumped out of the evaporator at 25–35° Brix with a relative viscosity of over 20,000 centipoises. Careful use of enzyine to increase SS yields or lower viscosity during pulpwashing did not adversely affect the °Brix, acid, pH or clouding ability of the concentrated pulp‐wash.