Bioethanol Production From Hydrolyzed Lignocellulosic After Detoxification Via Adsorption With Activated Carbon and Dried Air Stripping

Abstract

Bioethanol production has been presented as an alternative for supplying energy demand and minimizing greenhouse gases effects. However, due to abrasively conditions employed on the biomass during pretreatment and hydrolysis processes, inhibitors for fermentation phase such as acetic acid and others can be generated. Based on this problem, the aim of this work was to evaluate the adsorption of acetic acid on microporous activated carbon and investigate the stripping of the same component with dried air. For adsorption process, three concentrations of acetic acid (5, 10, and 20%) were analyzed by adsorption kinetics and adsorption isotherms (Langmuir and Freundlich models). Pseudo-second order model showed to fit better when compared to Pseudo-first order model. The Intraparticle Diffusion model presented the first phase of the adsorption as the regulating step of the adsorption process. The Langmuir model showed the best fitting, and the maximum capacity of adsorption was found as 128.66 mg.g−1. For stripping procedure an apparatus was set in order to insert dried air by a diffusor within the solution in study. Increasing temperature showed to be determinant on augmenting acetic acid evaporation in 2.14 and 6.22 times for 40 and 60°C when comparing it to 20°C. The application of the pickling process for removal of fermentation inhibitors in sugarcane bagasse hydrolyzed allowed the production 8.3 g.L−1 of ethanol.

Adaptive laboratory evolution under acetic acid stress enhances the multistress tolerance and ethanol production efficiency of Pichia kudriavzevii from lignocellulosic biomass

“…High concentrations of acetic acid inhibit the growth and ethanol production of several ethanologenic microorganisms, e.g., Candida shehatae , Pichia stipitis , Saccharomyces cerevisiae 11 , Kluyveromyces marxianus 12 and Zymomonas mobilis 13 , 14 . Several strategies have been applied to minimize the inhibitory effect of acetic acid on microbial growth and ethanol production, for instance, the removal of acetic acid using sodium borohydride 15 and activated carbon 16 , the application of dried air stripping 17 , or genetic engineering of microbial cells harboring the genes involved in acetic acid tolerance, such as FPS1 18 , PHO13 19 , and HAA1 20 .…”

Improvement of Bioethanol Production in Consolidated Bioprocessing (CBP) via Consortium of Aspergillus niger B2484 and Trichoderma asperellum B1581

“…Bioethanol, commonly known as ethyl alcohol (C 2 H 5 OH), is generated from the fermentation of fermentable sugars, such as glucose and sucrose, from plant sources using microorganisms (Chin & H'ng, 2013). The production of bioethanol represents as an alternative source of energy which also helps to minimise greenhouse gases effects (Artifon et al, 2018). The first-generation bioethanol production was based on food crops but due to competition between the food supply and bioethanol development, there was a sudden increase in food prices (Naik et al, 2010).…”

Jerusalem Artichoke as a Raw Material for Manufacturing Alternative Fuels for Gasoline Internal Combustion Engines

“…The production of biofuels from solid waste with preliminary hydrolysis is mainly conducted with solid waste as an input material [47][48][49][50][51][52]. Given that the hydrolysis takes place at elevated temperatures (ex.…”