Joint International Conference on Long-term Experiments ...

ecoming an oversaturated solution for many calcium salts. Also, by the
decomposition of groups of non-saccharates, oxalic acid is formed and it produces,
through the reaction with calcium ions, insoluble salts or hardly soluble calcium
ones. The sediments produced in the concentration station, partially deposit
themselves on the thermal exchange surfaces and partially leave the installation,
being carried along by the thick juice flow;
• decrease in the alkalinity of the juice as compared to the dry substance content, as a
result of the carbonate neutralization by the formed acids, the juice giving off
carbon dioxide;
• in the case of juice overcarbonization at the second carbonization, in the steamers
of the concentration station, the decomposition of the calcium hydrocarbonate in
calcium carbonate hardly soluble and in CO2 occurs.
The thick juice resulted from the concentration of the thick juice in the concentration
station must have the following technical features:
1. the content of dry substance: 62-70 o Brix, according to its purity and the fulfilment
of the thermostability criteria
2. dyeing: 1500-2500 units ICUMSA/100 o Brix
3. content of calcium salts in the case of technological mature and healthy cane: 50-60
mg CaO/100 o Brix
4. alkalinity to phenolphthalein: 0,005-0,06 g CaO/100 ml.
5. In these conditions, the quantity of thick juice that results from 100 kg cane is 23-
28 kg.
REFERENCES
1. Banu C., 1992 – „Progrese tehnice, tehnologice şi ştiinţifice în industria
alimentară”, Ed. Tehnică, Bucureşti.
2. Beceanu Dumitru, Chira Adrian, 2003 – „Tehnologia produselor agricole”, Ed.
Economică, Bucureşti.
3. Sarca Gheorghe, 2004 – „Materii prime vegetale”, Ed. Universităţii din Oradea.
4. <strong>International</strong> Sugar Journal, 2006 december.
5. Popescu V., Stroia A., 1998 – „Tehnologii moderne de industrializarea sfeclei de
zahăr”, Ed. Ceres, Bucureşti.
406