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Cane sugar crystallization using submerged vacuum membrane distillation crystallization (SVMDC).

Helen Julian1,2, Hafizh Rizqullah2, Michael Armando Siahaan2

  • 1Chemical Engineering Department, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung, 40132 Indonesia.

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|May 10, 2021
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Summary

Submerged Vacuum Membrane Distillation and Crystallization (SVMDC) successfully concentrated sugar solutions and induced crystallization, even with fouling and under-saturated conditions. Raw juice processing showed low flux due to impurities but prevented membrane wetting.

Keywords:
CrystallizationFoulingMembrane distillationMembrane distillation crystallizationSugar

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Area of Science:

  • Chemical Engineering
  • Separation Processes
  • Crystallization Technology

Background:

  • Membrane distillation is a promising technology for concentrating solutions.
  • Cane sugar processing requires efficient concentration and crystallization methods.
  • Submerged Vacuum Membrane Distillation and Crystallization (SVMDC) integrates these processes.

Purpose of the Study:

  • To investigate the performance of SVMDC for cane sugar concentration and crystallization.
  • To evaluate the impact of operational parameters on permeate flux.
  • To assess SVMDC feasibility with both model solutions and raw sugarcane juice.

Main Methods:

  • Utilized hollow fiber membranes in a submerged configuration.
  • Optimized feed concentration, temperature, and agitation.
  • Conducted long-term tests with cane sugar model solution and raw sugarcane juice.

Main Results:

  • Optimized parameters improved permeate flux.
  • Heterogeneous crystallization occurred in model solutions, forming crystals despite under-saturation.
  • Raw sugarcane juice yielded very low flux due to impurities, but prevented membrane wetting.
  • Impurities in raw juice inhibited sucrose molecule interaction and crystal growth.

Conclusions:

  • SVMDC can achieve cane sugar crystallization, with heterogeneous crystallization observed.
  • Membrane fouling and wetting are challenges in model solutions.
  • Impurities in raw sugarcane juice significantly impact flux and crystallization.
  • SVMDC shows potential but requires strategies to mitigate impurity effects.