Bioethanol Production as an Alternative End for Maple Syrups with Flavor Defects

Abstract

The purpose of this paper is to demonstrate the validity of an alternative route to valorize declassified maple syrups affected by flavor defects such as ropy maple syrup (RMS) and buddy maple syrup (BMS) as feedstocks for ethanol production. An acid hydrolysis treatment (0.1 M, 0.5 M, 5 M, and 10 M) was performed on the RMS to break the polysaccharide chains which are responsible for the flavor defect. The sugars and inhibitors composition of these hydrolysates were analyzed by ion chromatography and ion exclusion chromatography, respectively. Maple syrup samples were fermented by Saccharomyces cerevisiae for 96 h at 30 °C, and ethanol content was measured to determine the kinetic parameters of the process. RMS and BMS demonstrated a good potential to be used as feedstocks to produce ethanol achieving high efficiencies (RMS: 90.08%; BMS: 93.34%). The acid hydrolysis (25 min, 50 °C, with the addition of 5 M sulfuric acid solution) was effective to maximize ethanol production when using RMS as feedstock. To the best of our knowledge, it is the first time that such an approach is used to valorize declassified maple syrups.

The Physicochemical Characterization and In Vitro Digestibility of Maple Sugar Sand and Downgraded Maple Syrups

“…Polyphenols can be extracted from defective syrups using a variety of means without loss of their high-value biological properties [63,64]. Furthermore, the residue remains a good source of sugars for industrial uses such fermentation feedstock or ethanol production [65].…”

Production and Characterization of Downgraded Maple Syrup-Based Synbiotic Containing Bacillus velezensis FZB42 for Animal Nutrition

“…The utilization of buddy syrup as a carbon source has proven to be an effective and cost-effective approach, showing potential as a feedstock for fermentation. Another study has demonstrated the feasibility of using buddy and ropy maple syrups as potential substrates for fermentation with Saccharomyces cerevisiae to produce ethanol [45]. Moreover, maple syrup has been used as a carbon source in the production of a The utilization of buddy syrup as a carbon source has proven to be an effective and cost-effective approach, showing potential as a feedstock for fermentation.…”

“…Moreover, maple syrup has been used as a carbon source in the production of a The utilization of buddy syrup as a carbon source has proven to be an effective and cost-effective approach, showing potential as a feedstock for fermentation. Another study has demonstrated the feasibility of using buddy and ropy maple syrups as potential substrates for fermentation with Saccharomyces cerevisiae to produce ethanol [45]. Moreover, maple syrup has been used as a carbon source in the production of a nanobiomaterial, bacterial cellulose, by Acetobacter xylinum BPR 2001 [46].…”