1. Biorefinery production of poly-3-hydroxybutyrate using waste office paper hydrolysate as feedstock for microbial fermentation
- Author
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Saif N. Al-Bahry, Huda Al-Battashi, Annamalai Neelamegam, and Sivakumar Nallusamy
- Subjects
Paper ,0106 biological sciences ,Polyesters ,Hydroxybutyrates ,Biomass ,Bioengineering ,010501 environmental sciences ,Xylose ,Raw material ,01 natural sciences ,Applied Microbiology and Biotechnology ,Bioplastic ,Hydrolysate ,chemistry.chemical_compound ,Cellulase ,010608 biotechnology ,Cellulose ,0105 earth and related environmental sciences ,Waste Products ,business.industry ,beta-Glucosidase ,Hydrogen Peroxide ,General Medicine ,Biorefinery ,Pulp and paper industry ,Biotechnology ,chemistry ,Fermentation ,Cupriavidus necator ,business - Abstract
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.
- Published
- 2018