A Prior Biological Delignification Treatment as an Aid for the Hydrothermal Pretreatment of Sugarcane Straw

The pretreatment is a critical step for lignocellulosic biomass enzymatic hydrolysis, bearing a significant economic weight on the process of producing biomass sugar syrups. This study carried out a thorough investigation of the effect of a prior biological pretreatment (BPT) on the hydrothermal pre...

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Published inWaste and biomass valorization Vol. 13; no. 12; pp. 4881 - 4895
Main Authors Coelho, Bruno César S., da Silva, Davi M. M. C., Hermosilla, Edward D., Teixeira, Ricardo S. S., Bon, Elba P. S., Diez, Maria Cristina, Ferreira-Leitão, Viridiana S., da Silva, Ayla Sant’Ana
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Netherlands 01.12.2022
Springer Nature B.V
Subjects
Biological effects
Biomass
Cellulose
Digestibility
Engineering
Environment
Environmental Engineering/Biotechnology
Glucose
Hemicellulose
Hydrolysis
Hydrothermal pretreatment
Industrial Pollution Prevention
Lignocellulose
Microorganisms
Original Paper
Renewable and Green Energy
Selectivity
Straw
Sugarcane
Syrups
Waste Management/Waste Technology
Biomass pretreatment
Sugarcane straw
Hydrothermal pretreatment
Biological pretreatment
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Summary:The pretreatment is a critical step for lignocellulosic biomass enzymatic hydrolysis, bearing a significant economic weight on the process of producing biomass sugar syrups. This study carried out a thorough investigation of the effect of a prior biological pretreatment (BPT) on the hydrothermal pretreatment (HPT) efficiency, carried out under different severity conditions, to promote the enzymatic hydrolysis of sugarcane straw. Among the microorganisms studied for BPT, Pleurotus ostreatus was more effective, as it showed high selectivity for removing lignin and promoted higher cellulose digestibility, being selected to be combined with HPT. The sole effect of the HPT treatment, at 170 °C for 40 min (combined severity factor of 0.446), promoted high hemicellulose removal and the following enzymatic hydrolysis resulted in a 68.3% glucose yield. Nonetheless, the efficiency of the HPT was improved by performing BPT prior to HPT, even under lower severity conditions (160 °C for 40 min, combined severity factor of 0.073), resulting in an increased glucose yield of 78.5%, 1.2-fold higher than the HPT carried out solely. These results indicate that BPT is an interesting aid for HPT pretreatment of sugarcane straw. Graphical Abstract
ISSN:1877-2641
1877-265X
DOI:10.1007/s12649-022-01834-6