alexa Enhancing anaerobic biogasification of corn stover through wet state NaOH pretreatment.
Chemical Engineering

Chemical Engineering

Journal of Bioprocessing & Biotechniques

Author(s): Zheng M, Li X, Li L, Yang X, He Y

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Abstract A new method of wet state (WS) sodium hydroxide (NaOH) was advanced to pretreat corn stover for enhancing biogas production. The results showed that 88\% moisture content, 3-day treatment time and ambient temperature (20 degrees C) was appropriate for WS NaOH pretreatment. The NaOH dose of 2\% and the loading rate of 65 g/L were found to be optimal in terms of 72.9\% more total biogas production, 73.4\% more methane yield, and 34.6\% shorter technical digestion time, as compared to the untreated one. WS pretreatment used 86\% shorter treatment time and 66.7\% less NaOH dose than solid state one. The analyses of chemical compositions and chemical structures showed that 9.3-19.1\% reduction of the contents of total Lignin, cellulose, and hemicellulose (LCH), and 27.1-77.1\% increase of hot-water extractives contributed to the enhancement of biogas production. WS NaOH pretreatment could be one of cost-effective methods for high efficient biological conversion of corn stover into bioenergy. This article was published in Bioresour Technol and referenced in Journal of Bioprocessing & Biotechniques

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