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[9000834.] رقم البحث : 9000834 - |
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Assessment of the developed formula for determining true sucrose in sugar beet under Egyptian conditions / |
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قطاع الدراسات الزراعية / |
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Egyptian sٍugar journal / |
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اسماء فتحى محمود |
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sugar beet -sugar technology -. Beet quality-Sugar polarity-Sugar production |
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Sugar beet in Egypt is of low quality especially at the end of the campaign. This is due to variation of the climatic conditions and a long time from harvesting to manufacturing. Unfortunately, even small numbers of deteriorated beets affect the process negatively in many ways such as decreasing juice purities, sugar yield, increasing juice colors and the amount of lime used for juice clarification. The main effect is, however on the filtration of the 2nd carbonated juice. Presence of oligosaccharides such as glucose, fructose and raffinose in addition to polysaccharides (ex., dextran and levan), which are formed by microbial activity impairs or completely retards the filtration process. This greatly affects the capacity of the whole factory. Otherwise, raffinose and dextran are highly dextrorotatory substances (approximately two and three times higher as dextrorotatory as sucrose). So, their presence affects the polarization for sucrose determination, which may lead to sucrose polarizing over 100?s. This apparent sucrose not only causes an error in the sucrose balance of the sugar factory but also increases the sugar loss in molasses leading to reducing the rendement of sugar recovery % of the factory. Moreover, the farmers paid much money on the basis of these miss leading polarimetric readings. Therefore, there is an obvious need for assaying for raffinose and dextran in the core lab. This would allow correction of the falsified reading, but this assaying are very difficult to operate in the routine analysis because it needs more time. So, the objective of this work is to introduce a simple new equation for estimating the true sucrose values of sugar beet based on the Egyptian sugar beet analysis. Consequently, it could be helpful to set up accurate parameters for purchasing sugar beet in sugar factories. |
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