Raw sugar factory and refinery practice in Lopez Sugar Corporation, Sagay City, Negros Occidental, Philippines, special topic: correlation of the apparent purity of refinery process materials to the quality of the refined sugar

Date

2013

Degree

Bachelor of Science in Chemical Engineering

Major Course

Major in Sugar Technology

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Jovita L. Movillon

Abstract

The practicum took place at Lopez Sugar Corporation (LSC) at Barangay Paraiso, Sagay City, Negros Occidental, Philippines. It consisted of 288 working hours from the 15th of April to the 21st of May 2013. Lopez Sugar Corporation is a raw and refinery sugar manufacturing factory. It produces standard and premium sugar for different clients in the food and tobacco industry such as Nestlé, Coca-cola, Pepsi and Philip Morris. Like other sugar factories, sugar processing in LSC begins with cane weighing , then preparation and juice extraction from the sugar canes through a series of rollers. The juice undergoes clarification to remove large amounts of impurities by flocculation and settling. The mud slurry undergoes filtration to further recover the juice while the clarified juice proceeds to evaporation to remove large amount of water thus producing the syrup. The syrup is boiled to produce the massecuite which undergoes centrifugation to separate raw sugar from the molasses. The raw sugar goes through a series of processes to remove the color and impurities thus producing a higher purity sugar. Refinery process starts with weighing of sugar, then affination followed by carbonatation or the production of calcium precipitates by gassing out carbon dioxide with the limed liquor. The carbonated liquor proceeds to filtration to remove the precipitates with the impurities and colorants. Decolorization comes next for higher degree of color removal then the fine liquor goes through evaporation, white pan boiling, centrifugation, drying and bagging. Material and energy balances were performed for the whole operation. The calculated picul sugar per ton cane (PSTC) was 1.55. Raw sugar production was 30.10 tons/hr while the refined sugar production was 27.85 tons/hr. The refining yield was 1.17 and the bagasse consumption was 106.72% which means that the factory consumes more bagasse for power generation than it produces during milling. Because of bagasse shortage, LSC continually buys bagasse from other sugar factories.

Language

English

Location

UPLB College of Engineering and Agro-Industrial Technology (CEAT)

Call Number

LG 993 2013 E62 /L372

Document Type

Thesis

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