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This report presents a cost analysis of Polyhydroxybutyrate (PHB) production from natural gas. In this process, methane contained in the natural gas feedstock is fermentated to Poly-3-hydroxybutyrate by a mixed methanotrophic culture. This report was developed based essentially on the following reference(s): Keywords: Polyhydroxyalcanoate, PHA, Methanotrophic Fermentation, Polyhydroxybutyrate, PHB
This report presents a cost analysis of Polyhydroxybutyrate (PHB) production from switchgrass In this process, switchgrass is gasified to synthesis gas (syngas), which is fermented to PHB. Hydrogen is generated as by-product. This report was developed based essentially on the following reference(s): “A Techno-economic Analysis of Polyhydroxyalkanoate and Hydrogen Production from Syngas Fermentation of Gasified Biomass” Keywords: Polyhydroxyalcanoate, PHA, Gasification, Fermentation
This report presents a cost analysis of Polyhydroxybutyrate (PHB) production from sugarcane bagasse. In this process, bagasse is gasified to synthesis gas (syngas), which is fermented to PHB. Hydrogen is generated as by-product. This report was developed based essentially on the following reference(s): Keywords: Polyhydroxyalcanoate, PHA, Gasification, Fermentation
PHAs are synthesized by many microorganisms to serve as intracellular carbon storage molecules. In some bacterial strains, PHB can account for up to 80% of cell mass. In addition to its application in the packaging sector, PHB also has great potential as an intermediate in the production of hydrocarbon fuels. PHB can be thermally depolymerized and decarboxylated to propene which can be upgraded to hydrocarbon fuels via commercial oligomerization technologies. In recent years a great effort has been made in bacterial production of PHB, yet the production cost of the polymer is still much higher than conventional petrochemical plastics. The high cost of PHB is because the cost of the substrates can account for as much as half of the total product cost in large scale fermentation. Thus searching for cheaper and better substrates is very necessary for PHB production. In this study, we demonstrate production of PHB by Cupriavidus necator from a process relevant lignocellulosic derived sugar stream, i.e., saccharified hydrolysate slurry from pretreated corn stover. Good cell growth was observed on slurry saccharified with advanced enzymes and 40~60% of PHB was accumulated in the cells. The mechanism of inhibition in the toxic hydrolysate generated by pretreatment and saccharification of biomass, will be discussed.