Efficient bioconversion of sugarcane bagasse into polyhydroxybutyrate (PHB) by Lysinibacillus sp. and its characterization

Rijuta Ganesh Saratale, Si Kyung Cho, Ganesh Dattatraya Saratale, Gajanan S. Ghodake, Ram Naresh Bharagava, Dong Su Kim, Supriya Nair, Han Seung Shin

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

In this study, Lysinibacillus sp. RGS was evaluated to synthesize polyhydroxybutyrate (PHB) from a broad range of pure carbon sources and residual sugars of chemically pretreated sugarcane bagasse (SCB) hydrolysates. Effects of supplementation of nutrients and various experimental variables to enhance PHB accumulation were investigated. Results of optimized parameters were identified as 48 h, 37 °C, pH 7; inoculums concentration (2.5% v/v) and shaking condition (100 rpm). Growth kinetics and bioprocess parameters of Lysinibacillus sp. using SCB hydrolysates with corn steep liquor (2%) accounted for the maximum cell growth (8.65 g/L) and PHA accumulation (61.5%) with PHB titer of (5.31 g/L) under optimal conditions. The produced biopolymer was studied by Fourier Transform Infrared (FTIR) spectroscopy and the results revealed the obtained to be PHB. Thus Lysinibaciluus sp. exhibits high potential in industrial scale manufacture of PHB using SCB as an inexpensive substrate.

Original languageEnglish
Article number124673
JournalBioresource Technology
Volume324
DOIs
StatePublished - Mar 2021

Keywords

  • Corn steep liquor
  • Lysinibacillus sp. RGS
  • Peracetic acid pretreatment
  • Poly(3-hydroxybutyrate)
  • Saccharification yield
  • Sugarcane bagasse

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