Mapping potential solvents for inhibitors removal from sugarcane bagasse hemicellulosic hydrolysate and its impact on fermentability

Author(s)

Nascimento, Viviane Marcos ; Ienczak, Jaciane Lutz ; Boni, Rafael ; Filho, Rubens Maciel ; Rabelo, Sarita Candida

• Document type: Journal article
• Source: INDUSTRIAL CROPS AND PRODUCTS; v. 192, p. 10-pg., 2023-02-01.

Abstract

Liquid-liquid extraction as a detoxification process can increase productivity and product titers from lignocellulosic biomass fermentable sugars while leading to inhibitors recovery for further upgrading in sustainable chemical platforms. In this study, 14 solvents were investigated for inhibitors compounds removal. In addition to solvent solubility in hemicellulosic hydrolysate (HH) and distribution coefficients, solvent biocompatibility with S. passalidarum was determined. Considering all solvents evaluated, methyl isobutyl ketone (MIBK) showed good acetic acid (35%), furfural (42%), phenolic (35%), hydroxymethylfurfural (76%), and formic acid (18%) extraction. The medium presented lower HH solubility (0.93 +/- 0.08 gsol L-HH(-1)), which provided an ethanol yield (82.2 +/- 0.6%), and productivity (0.90 +/- <= 0.1 gEtOH L-1 h(-1)) higher than those of the synthetic media (control) (79.6 +/- 0.3% and 0.89 +/- = 0.1 gEtOH L-1 h(-1)). In addition, preliminary evaluation of the solvent health-safety-environment pointed to MIBK as one of the solvents with the least impacts on climate change and human toxicity. (AU)

• FAPESP's process: 15/20630-4 - Biorefinery development integrated to a bioethanol sugar cane plant with zero CO2 emission: routes to convert renewable resources to bio-products and bio-electricity
• Grantee: Rubens Maciel Filho
• Support Opportunities: Research Projects - Thematic Grants