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Review on production, downstream processing and characterization of microbial pullulan.

Sugumaran K R1, Ponnusami V2

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Summary

This review explores pullulan (a microbial exopolysaccharide) production by Aureobasidium pullulans. It highlights factors influencing pullulan

Keywords:
ApplicationsAureobasidium pullulansBiosynthesisDownstream processingPullulan

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Area of Science:

  • Microbiology
  • Biotechnology
  • Polymer Science

Background:

  • Pullulan is a commercially significant microbial exopolysaccharide produced by Aureobasidium pullulans.
  • It is a non-mutagenic, non-toxic, edible polymer with excellent film-forming and rheological properties.
  • Widely used in food, agriculture, textiles, cosmetics, and pharmaceuticals.

Purpose of the Study:

  • To review the literature on pullulan production.
  • To discuss the influence of upstream, bioprocessing, and downstream methods on pullulan characteristics.
  • To highlight the importance of low-cost substrates for economical pullulan production.

Main Methods:

  • Literature review of scientific publications on pullulan.
  • Analysis of factors affecting pullulan production and properties.
  • Discussion of various industrial applications.

Main Results:

  • Pullulan's properties and cost are significantly impacted by raw material selection, fermentation conditions, and recovery processes.
  • Both upstream and bioprocessing influence the rheological, thermal, and physical attributes of pullulan.
  • Growing interest in utilizing low-cost substrates to reduce production expenses.

Conclusions:

  • Optimizing upstream, bioprocessing, and downstream stages is crucial for efficient and cost-effective pullulan production.
  • Further research into low-cost substrates can enhance the economic viability of pullulan.
  • Pullulan remains a versatile biopolymer with extensive industrial potential.