Abstract
In this study, the simulation of microorganism ability for the production of poly-β-hydroxybutyrate (PHB) from natural gas (as a carbon source) was carried out. Based on the Taguchi algorithm, the optimum situations for PHB production from natural gas in the columnar bubble reactor with 30 cm length and 1.5 cm diameter at a temperature of 32 °C was evaluated. So, the volume ratio of air to methane of 50:50 was calculated. The simulation was carried out by COMSOL software with two-dimensional symmetric mode. Mass transfer, momentum, density-time, and density-place were investigated. The maximum production of biomass concentration reached was 1.63 g/L, which shows a 10% difference in contrast to the number of experimental results. Furthermore, the consequence of inlet gas rate on concentration and gas hold up was investigated Andres the simulation results were confirmed to experimental results with less than 20% error.
Highlights
The facility of use and desirability of plastic materials properties led to their growing utilization in packaging and food industries [1]
The results showed the growth of microorganisms and the production of polyhydroxy butyrate (PHB) in the existence of methane in the liquid phase
The concentration contour was determined at 14 min
Summary
The facility of use and desirability of plastic materials properties led to their growing utilization in packaging and food industries [1]. Since 1970, with the decline of the landfill problem worldwide, the issue of the use of biodegradable polymers was raised [3]. Non-degradable polymers, such as polyethylene, polypropylene, and polystyrene are produced from monomeric sources of oil and are resistant to environmental issues. Biodegradable plastics or bioplastics with properties, such as biodegradability, environmental compatibility, the ability to produce renewable sources, less energy consumption in production, the production of water and carbon dioxide when degrading, compete with conventional plastics obtained from oil, especially with declining demand in the global market [4,5,6,7]
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