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Microwave-assisted dilute acid pretreatment of different agricultural bioresources for fermentable sugar production

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Abstract

Microwave-assisted pretreatment can be used for fermentable sugar production from lignocellulosic biomass. In this study, the optimum hydrolysis conditions of barley husk, oat husk, wheat bran, and rye bran were determined in power level, treatment time, solid-to-liquid ratio and dilute acid ratio as follows: 700 W, 6.92 min, 1:18.26 w/v, and 3.67% for barley husk, 600 W, 6.96 min, 1:17.22 w/v, and 3.47% for oat husk, 600 W, 6.92 min, 1:16.69 w/v, and 1.85% for wheat bran, and 460 W, 6.15 min, 1:17.14 w/v, and 2.72% for rye bran. The fermentable sugar concentrations were 37.21 (0.68 g/g), 38.84 (0.67 g/g), 49.65 (0.83 g/g), and 36.27 g/L (0.62 g/g) under optimum conditions, respectively. The results showed that microwave-assisted pretreatment is a promising technology which can be successfully implemented for the hydrolysis of lignocellulosic biomass for high sugar yield. On the other hand, hydrolysates included some inhibitors such as organic acids, furans, and phenolic compounds. Lignocellulosic biomass used in this study can be employed as good feedstocks for value-added product production in the fermentation process, after the inhibitors have been detoxified/removed with different detoxification methods.

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Acknowldgments

This study was supported by the Akdeniz University Research Foundation.

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Authors and Affiliations

  1. Department of Food Engineering, Akdeniz University, 07058, Antalya, Turkey

    Mustafa Germec, Fadime Demirel, Nurullah Tas, Ali Ozcan, Cansu Yilmazer, Zeynep Onuk & Irfan Turhan

  2. Department of Food Engineering, Cankiri Karatekin University, 18100, Cankiri, Turkey

    Mustafa Germec

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  1. Mustafa Germec
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  2. Fadime Demirel
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  3. Nurullah Tas
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  4. Ali Ozcan
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  5. Cansu Yilmazer
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  6. Zeynep Onuk
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  7. Irfan Turhan
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Correspondence to Irfan Turhan.

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Germec, M., Demirel, F., Tas, N. et al. Microwave-assisted dilute acid pretreatment of different agricultural bioresources for fermentable sugar production. Cellulose 24, 4337–4353 (2017). https://doi.org/10.1007/s10570-017-1408-5

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  • DOI: https://doi.org/10.1007/s10570-017-1408-5

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