ENHANCEMENT OF BIO-HYDROGEN PRODUCTION EFFICIENCY AND APPLICATION POTENTIAL OF PEANUT SHELL WITH LOW-TEMPERATURE PRETREATMENT
At present,research on improving the hydrogen production efficiency of cellulose waste fermentation mostly focuses on comparing different pretreatment methods and optimizing experimental conditions.While there is little research on the experimental design and application analysis of low-temperature pretreatment technology.In this study,the pretreatment temperature and time of temperature pretreatment on peanut shell were optimized for further biohydrogen production.The pretreatment conditions were designed using orthogonal experiment design(OED)and central composite design(CCD)and optimized using the direct measurement and response surface methods.The modified Gompertz model(MGM)and a logistic function model(LFM)were employed to determine the kinetics of hydrogen-rich bioenergy production from the peanut shell.The OED results showed that peanut shell pretreated for 12 h at 50 ℃ produced the maximum TRS of 3.16％,exhibiting a better result than CCD.A maximum hydrogen yield of 109.2 mL was obtained when the PSP was pretreated at-80 ℃ for 12 h,which was 54.46％higher than the control.Model simulation indicated that the LFM predicted hydrogen production more accurately than the MGM,as evidenced by the high correlation coefficient and high Pearson's correlation between predicted and actual values.The high hydrogen yield promotion and the realization of no energy consumption of the temperature pretreatment in some peanut shell planting areas,can provide a potential application for cost-efficient and stabilized bioenergy recovery from peanut shell with temperature pretreatment.
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