Biorefinery production of poly-3-hydroxybutyrate using waste office paper hydrolysate as feedstock for microbial fermentation

Annamalai Neelamegam, Huda Al-Battashi, Saif Al-Bahry, Sivakumar Nallusamy

Research output: Contribution to journalArticle

12 Citations (Scopus)


Waste paper, a major fraction of municipal solid waste, has a potential to serve as renewable feedstock for the biorefineries of fuels, chemicals and materials due to rich in cellulose and abundant at low cost. This study evaluates the possibility of waste office paper (WOP) to serve as a potential feedstock for the biorefinery production of poly (3-hydroxybutyrate). In this study, the WOP was pretreated, enzymatically saccharified and the hydrolysate was used for PHB production. The hydrolysate mainly consists of glucose (22.70 g/L) and xylose (1.78 g/L) and the corresponding sugar yield was about 816 mg/g. Ammonium sulphate and C/N ratio 20 were identified as most favorable for high yield of PHB. The batch fermentation of Cupriavidus necator using the pretreated WOP hydrolysate resulted in cell biomass, PHB production and PHB content of 7.74 g/L, 4.45 g/L and 57.52%, respectively. The volumetric productivity and yield achieved were 0.061 g/L/h and 0.210 g/g sugar, respectively. The results suggested that WOP could be a potential alternative feedstock for the biorefinery production of bioplastics.

Original languageEnglish
Pages (from-to)25-30
Number of pages6
JournalJournal of Biotechnology
Publication statusPublished - Jan 10 2018



  • Biorefinery
  • Cupriavidus necator
  • Feedstock
  • Fermentation
  • PHB
  • Waste office paper

ASJC Scopus subject areas

  • Biotechnology
  • Applied Microbiology and Biotechnology

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