Economic assessment of ABE (Acetone-Butanol-Ethanol) fermentation for cellulosic and non-cellulosic feedstocks

Show simple item record Kumar, Manish Goyal, Yogesh Gayen, Kalyan Saini, Supreet
dc.contributor.other 64th Annual Session of Indian Institute of Chemical Engineers CHEMCON
dc.coverage.spatial Bangalore, Karnataka, India 2014-04-22T19:54:57Z 2014-04-22T19:54:57Z 2011-12-27
dc.identifier.citation Kumar, Manish; Goyal, Yogesh; Gayen, Kalyan and Saini, Supreet, “ Economic assessment of ABE (Acetone-Butanol-Ethanol) fermentation for cellulosic and non-cellulosic feedstocks” in 64th Annual Session of Indian Institute of Chemical Engineers CHEMCON, Bangalore, IN, December 27-29, 2011. en_US
dc.description.abstract With increasing emphasis on renewable energy, biobutanol can become one of the major contenders for the replacement of gasoline. This is particularly so because biobutanol’s physicochemical properties are very close to those of gasoline. Hence, the focus of the researchers mainly includes economical production of biobutanol (ABE Fermentation) at industrial level. The major problems of biobutanol production at an industrial scale are unavailability of cheap feedstocks, production inhibition, low yield, and inefficient product recovery processes. Through research efforts, these problems are being tackled via development of fermentation processes, outreach for alternate and the most suited raw materials, and engineering microbial strains for optimum biobutanol production. From the raw material point of view, lignocellulosic materials, mainly agricultural wastes (e.g., barley straw, wheat straw, corn stover, corn fibers, switchgrass, and woody wastes), illustrate the potential as future raw materials for ABE fermentation due to their low cost and high availability. In this way, the main strategies include strain improvement, development of hydrolysis processes of raw materials, and integrated fermentation and recovery processes (e.g., gas stripping, pervaporation, perstraction, and adsorption). It should be noted that before developing a large scale plant, its economical assessment is a vital step, for instance, in this case to select suitable raw materials and processes for production and separation. Therefore, in present work, a comparative economical analysis has been performed based on cellulosic (bagasse, barley straw, wheat straw, corn stover, and switchgrass) and noncellulosic (glucose, sugarcane, corn, and sago) feedstocks, which are widely and cheaply available in agriculture based countries like India except switchgrass. Some food competitive materials like glucose, sugarcane, corn, and sago have been selected for the comparative analysis. Design of ABE fermentation and separation processes have been performed on the basis of experimental data available in literature at laboratory scale as industrial data for these processes are not yet readily available. Therefore, rational assumptions were necessary to design the process and evaluate its economics. The plant design was carried out on the basis of production of 10,000 tonnes butanol in an operational period of 330 days per year. All the simulations and calculations were performed using MATLAB software (Mathworks, Natick, MA, USA) and Microsoft Excel Spreadsheet. Our results demonstrated that production cost using glucose as the raw material was four fold higher than other feedstocks. Interestingly, sugarcane and cellulosic materials showed suitability for economically feasible production of butanol with the production cost range of $0.59 to $0.75 per kg butanol. Consequently, quantitative variation in the design and process parameters namely fermentor size, plant capacity, production yield using sugarcane and cellulosic materials as raw materials, enforced significant reduction in unitary cost of butanol up to 53%, 19%, and 31% respectively. Therefore, these parameters have capability to play a significant role in making the butanol production economical from cheaper feedstocks (sugarcane and cellulosic materials). Further, high sensitivity of production cost from the product yield and saccharification of lignocellulosic materials postulate that significant reconstruction of genome of butanol producing bacteria will aid in improving the yield of ABE fermentation. This study suggested that butanol production can be economical on using cellulosic materials and useful for designing an industrial scale plant. Further, assessment of sensitivity of butanol production from recovery cost can provide more effective input in this field. Hence, this study shall help understand the multivariate dependence of plant economics in a better way which, in turn, shall help to minimize the production cost of butanol. Our full paper will include methodology of equipment and process design, evaluation of different costs, and sensitivity of these costs from different process and design parameters (fermentor size, plant capacity, production yield). Paper will also illustrate the importance of feedstock cost in the production cost of butanol. During the presentation, various processes of butanol production based on different feedstocks (cellulosic and non-cellulosic), effect of above mentioned process and design parameters on unitary cost of biobutanol production will be discussed in order to optimize them for the desired production. In addition, it will also include the sensitivity analysis of production cost based on feedstock cost, which shall be instrumental in selecting the cost effective feedstocks. en_US
dc.description.statementofresponsibility by Manish Kumar, Yogesh Goyal, Kalyan Gayen and Supreet Saini
dc.language.iso en en_US
dc.subject Acetone-butanol-ethanol en_US
dc.subject Economics en_US
dc.subject Non-cellulosic en_US
dc.title Economic assessment of ABE (Acetone-Butanol-Ethanol) fermentation for cellulosic and non-cellulosic feedstocks en_US
dc.type Article en_US

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