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<p>The microbial biotransformation of low-cost feedstock to generate biodegradable biopolymers, as an alternative to synthetic plastics, is a promising strategy for sustainable development. The study investigated the biotransformation of dairy byproduct (whey) into polyhydroxyalkanoate (PHA) copolymers with the supplementation of amino acids using <i>Ralstonia eutropha</i>. The sulphur-containing (cystine, cysteine, methionine) and aromatic (phenylalanine, tryptophan, and tyrosine) amino acids were supplemented. The highest yield of 37.1195% was obtained with tryptophan supplementation. The characterisation of PHA and its copolymers was conducted using ESI–MS and FTIR. This study demonstrates that dairy byproducts can potentially serve as a cost-effective feedstock for producing high concentrations of biopolymers with amino acid supplementation, thereby promoting a sustainable waste management system.</p>

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Tailoring PHA copolymer types via amino acid supplementation in dairy byproduct media

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月4日

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  • Tejaswini Patil,
  • Preetam Bannerjee,
  • Aparna Agarwal,
  • Abhishek Dutt Tripathi,
  • Veena Paul,
  • Ankita Hooda,
  • Mansour K. Gatasheh,
  • Dipendra Kumar Mahato

摘要

The microbial biotransformation of low-cost feedstock to generate biodegradable biopolymers, as an alternative to synthetic plastics, is a promising strategy for sustainable development. The study investigated the biotransformation of dairy byproduct (whey) into polyhydroxyalkanoate (PHA) copolymers with the supplementation of amino acids using Ralstonia eutropha. The sulphur-containing (cystine, cysteine, methionine) and aromatic (phenylalanine, tryptophan, and tyrosine) amino acids were supplemented. The highest yield of 37.1195% was obtained with tryptophan supplementation. The characterisation of PHA and its copolymers was conducted using ESI–MS and FTIR. This study demonstrates that dairy byproducts can potentially serve as a cost-effective feedstock for producing high concentrations of biopolymers with amino acid supplementation, thereby promoting a sustainable waste management system.