Dilute alkali pretreatment of softwood pine: A biorefinery approach

作者：Safari Ali; Karimi Keikhosro; Shafiei Marzieh^*

来源：Bioresource Technology, 2017, 234: 67-76.

DOI：10.1016/j.biortech.2017.03.030

• Biorefinery
• Ethanol
• Biogas
• Dilute alkali pretreatment
• Softwood pine

Dilute alkali pretreatment was performed on softwood pine to maximize ethanol and biogas production via a biorefinery approach. Alkali pretreatments were performed with 0-2% w/v NaOH at 100-180 degrees C for 1-5 h. The liquid fraction of the pretreated substrates was subjected to anaerobic digestion. The solid fraction of the pretreatment was used for separate enzymatic hydrolysis and fermentation. High ethanol yields of 76.9 78.0% were achieved by pretreatment with 2% (w/v) NaOH at 180 degrees C. The highest biogas yield of 244 mL/g volatile solid (at 25 degrees C, 1 bar) was achieved by the pretreatment with 1% (w/v) NaOH at 180 degrees C. The highest gasoline equivalent (sum of ethanol and methane) of 197 L per ton of pinewood and the lowest ethanol manufacturing cost of 0.75 sic/L was obtained after pretreatment with 1% NaOH at 180 degrees C for 5 h. The manufacturing cost of ethanol from untreated wood was 4.12 sic/L.

• 出版日期2017-6