Optimizing Sugar Refining at La Union Mill-Refinery in Guatemala

This study highlights significant advancements in sugar refining at the La Union mill-refinery in Guatemala, focusing on process optimization and cost savings. ​Key improvements include:

1. Purification Stage Optimization:
    
   • Real-time raw-liquor color monitoring using a colorimeter and feedforward control loops for precise adsorbent dosing. ​
    
   • Implementation of Ecosorb® S-1451 adsorbent with superior formulation, reducing filter aid consumption by 50% and extending filter cycles.
    
   • Enhanced decolorization efficiency, producing fine liquor with consistent low color (180-200 ICUMSA units). ​
 
2. Crystallization and Finishing Stage Optimization:
    
   • Adoption of a One-Boiling Massecuite with backboiling scheme for efficient sucrose extraction and reduced runoff. ​
    
   • Mass balance calculations to regulate runoff returning to the mill, ensuring stable crystallization and centrifugation performance. ​
    
   • Real-time monitoring and hourly sugar balance reports for supervisors to maintain optimal refinery operations. ​

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