Performance Evaluation of a Centrifugal – Shredder for Sugar Cane Juice Extraction

Author : Fetalvero, Lailanie Laviña
Major Adviser : Acda, Reynaldo I.
Major Co-Adviser : Casiano S. Abrigo, Jr.
Committee Members : Movillon, Jovita A.; Gumasing, Myra dR
Year : 1996
Month : October
Type : Thesis
Degree: BS
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A small scale centrifugal-shredded juice extractor was evaluated using three varieties of sugarcanes, namely Badila, CAC 57-13 and PHIL 72-28. The study was conducted to determine juice extraction efficiency as affected by the fiber content of the cane.

The cane stalks were prepared for the extraction process. The juice was separated from the bagasse component of the cane by centrifugal force. Cane samples were shredded and distributed within the basket. The particles close to the perforations in turn, made possible for the juice to be forcedly ejected outside. Having been able to create such force, the tendency of the bagasse which cannot pass the holes was to move up to the basket lid where there were lesser resistance, thus facilitating the separation.

The results of the experiment were analyzed. Juice extraction efficiency were computed and the values ranged from 17 % to 41 % in the dry extraction process. The extraction with imbibition water got 65 % to 96 % efficiency. In terms of pol, the analysis was hindered by limiting factors such as cane quality. The cane samples were either not mature enough or overripe so, the extractor was evaluated only in terms of its power of performance in separating juice from the cane stalks. The power consumption ranged from 2.61 hP to 3.49 hP for every 2 kg of cane sample, since the equipment uses 130 watts from 15 to 20 hrs depending on the fiber content of the canes. Cumulative juice extraction were plotted and a directly proportional curve was attained on both wet and dry extraction processes.

During the performance of the experiment, losses were determined and the values were high (ranging from 11.4 g to 88.4 g).These bagasse and juice losses were accounted to several factors including mainly manual cleaning of the basket resulting to adherence of the fine shredded particles to the hands and evaporation due to accumulation of heat from the motor or heat due to friction created by the shredding process, specially when the cane was too hard.

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