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Efficient polyhydroxybutyrate production from Bacillus juice substrate thuringiensis using sugarcane.

Anon Thammasittirong1,2, Sudarat Saechow1, Sutticha Na-Ranong Thammasittirong1,2

  • 1Department of Microbiology, Faculty of Liberal Arts and Science, Kasetsart University , Nakhon Pathom, Thailand.

Turkish Journal of Biology = Turk Biyoloji Dergisi
|March 1, 2019
PubMed
Summary

Researchers optimized polyhydroxybutyrate (PHB) production using Bacillus thuringiensis B417-5 and cost-effective sugarcane juice. This bacterium shows potential for economical biopolymer manufacturing.

Keywords:
Bacillus thuringiensisbioplasticpolyhydroxyalkanoatepolyhydroxybutyratesugarcane juice

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Area of Science:

  • Biotechnology
  • Microbiology
  • Polymer Science

Background:

  • Polyhydroxybutyrate (PHB) is a biodegradable biopolymer with diverse applications.
  • Efficient and cost-effective production methods are crucial for widespread PHB adoption.
  • Bacillus species are known producers of PHB, but optimization is needed.

Purpose of the Study:

  • To screen Bacillus isolates for high PHB production.
  • To optimize PHB yield using cost-effective substrates.
  • To evaluate sugarcane juice as a carbon source for PHB synthesis.

Main Methods:

  • Screening of 602 local Bacillus isolates for PHB production.
  • Characterization of the extracted polymer using 1H NMR and FTIR.
  • Optimization of culture conditions (medium composition, pH, temperature, time) for PHB accumulation.

Main Results:

  • Bacillus thuringiensis B417-5 identified as the highest PHB producer (2.278 g/L, 60.07% DCW).
  • Optimized conditions yielded 2.768 g/L PHB (72.08% DCW) using sugarcane juice and yeast extract.
  • Sugarcane juice confirmed as a viable and economical carbon source.

Conclusions:

  • Bacillus thuringiensis B417-5 is a promising candidate for large-scale PHB production.
  • Optimized fermentation using sugarcane juice offers an economical route for biopolymer synthesis.
  • This study highlights the potential of agro-industrial byproducts for sustainable biopolymer manufacturing.