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Bioconversion of fish solid waste into PHB using Bacillus subtilis based submerged fermentation process.

S Mohapatra1, B Sarkar2, D P Samantaray3

  • 1a Department of Biotechnology , Indian Institute of Technology , Roorke , India.

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|February 7, 2017
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Summary
This summary is machine-generated.

Fish solid waste can be converted into a biopolymer called polyhydroxybutyrate (PHB) using Bacillus subtilis. This PHB is less toxic and supports cell growth, offering a sustainable alternative to plastics.

Keywords:
BioconversionFSWPHAsPHBhomopolymer

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Area of Science:

  • Biotechnology and Environmental Science
  • Microbial Biopolymer Production

Background:

  • Solid waste management is a global challenge, with petroleum-based plastics and fish solid waste (FSW) being major contributors.
  • Converting FSW into valuable biopolymers offers a promising solution to reduce environmental pollution.

Purpose of the Study:

  • To investigate the bioconversion of FSW extract into polyhydroxybutyrate (PHB) using Bacillus subtilis.
  • To characterize the produced biopolymer and assess its biocompatibility.

Main Methods:

  • Utilized Bacillus subtilis (KP172548) for the bioconversion of FSW extract.
  • Optimized conditions for PHB production.
  • Characterized the purified biopolymer using advanced analytical techniques.
  • Assessed biocompatibility using the murine macrophage cell line RAW264.7.

Main Results:

  • Achieved a production of 1.62 g/L of PHB under optimized conditions.
  • Confirmed the biopolymer as PHB, a common polyhydroxyalkanoate (PHA) homopolymer.
  • Demonstrated that the PHB produced from FSW extract is less toxic and promotes cell attachment and proliferation compared to PLA and commercial PHB.

Conclusions:

  • This study is the first to show Bacillus subtilis can effectively utilize FSW extract for biopolymer production.
  • The PHB derived from FSW extract exhibits favorable biocompatibility, suggesting its potential as a sustainable biomaterial.
  • Further research is recommended for pilot-scale production of PHB from FSW extract.