Investigating the possibility of producing Polyhydroxyalkanoates (PHAs) Using Hydrolysates of Napier grass by Burkholderia Sacchari strain
DOI:
https://doi.org/10.1234/77e6hs31Keywords:
Polyhydroxyalkanoate, Napier grass, Glucose-rich hydrolysate, , PHA productivity, Burkholderia Sacchari,Abstract
Bacteria produces Polyhydroxyalkanoates (PHAs), which are macromolecules. They are inclusion bodies that build up as reserve resources while bacteria grow under various stress situations. PHAs have been chosen as alternatives for the development of biodegradable polymers due to their rapid degradability under natural environmental circumstances. This study aimed to produce reducing sugars from Napier grass for use as a carbon source in polyhydroxyalkanoate (PHA) synthesis. The effects of temperature, pH, and culture time on growth yields were adjusted using Response Surface Methodology using a Box-Behnken design.
Burkholderia Sacchari strain was chosen from more than 300 bacterial strains capable of PHA accumulating strains based on its ability to consume both hexose and pentose sugars and has a capacity of accumulating high mass PHA granules inside its cells. At 200 rpm, optimal pH, fermentation temperature, and incubation time for the isolate to produce the highest PHA were 7, 35 °C, and 48 hour, respectively.
When hydrolysates of Napier grass was employed as carbon sources and ammonium sulphate as nitrogen sources, the strain was able to collect 62.1% PHA from its total biomass. The extracted PHAs' FTIR spectra show strong peaks at wavenumbers that are unique to PHAs as C–H, CH2, O-H, C=O, and C–O groups. The extract's resemblance appropriateness for bioplastic production were validated by UV–Vis spectrophotometric analysis.
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