Sucropedia.com - Evaporation - Cane Juice

By Bento, Luis San Miguel
Posted on 2006-11-30    Last edited on 2009-09-25
http://sucropedia.com/entries/E0061


Clarified juice is concentarted in evaporators, normally with five bodies (Figure 26). Concentration increases from 15 brix until approximately 65 brix.

Figure:  Evaporator system with five effects

Colour can be formed during evaporation. Non enzymatic oxidation reaction of phenolic can occur. However the velocity of this reaction is lower as the one of enzymatic browning reactions (Paton, 1992).

After evaporation, sugar syrups and masses have higher concentrations, as in the previous factory sections. From 15 brix sugar products pass to values between 70 brix and 80 brix, in syrups out of centrifuges and higher than 90 brix in massecuites from vacuum pans. At these concentrations , Maillard reactions can odccur, with formation of melanoidins. The formation of these compounds depends mainly from amino compounds concentration and from other factors as pH, brix and invert sugars concentration (Paton e McCowage, 1987).


Bibliography

Paton N.H., 1992, The origin of colour in raw sugar, Proc. of Aust. S.S.C.T. Conf. 8-17
Paton N.H., Mc Cowage, 1987, Colour forming mechanisms during mill processing, Proc. of Aust. S.S.C.T.
Conf.,
  11-20