Abstract
Wider exploration of ethanol coproducts is required as the ethanol industry continues to expand. Currently, process streams such as thin stillage and condensed distillers solubles (CDS) are processed into DDGS and used as animal feeds, but other higher value opportunities may exist. The objective of this study was to identify chemical components in CDS and thin stillage and to quantify physical properties. Analysis of protein, organic acid, and sugar profiles was explored. Physical properties including density, thermal conductivity, thermal diffusivity, and moisture were also examined. CDS had an average density of 1.02 g/cm3, while thin stillage had 1.08 g/cm3. The thermal diffusivity of thin stillage was 0.11 mm2/s, while that of CDS was 0.10 mm2/s. Thermal conductivity of thin stillage and CDS were approximately 0.54 W/m0C0.45 W/m0C, respectively. The moisture content for the thin stillage was found to be 93.28 %wb, while CDS had one of 73.63 %wb. Based on the protein profiles it was determined that the majority of the protein found in both thin stillage and CDS was located in the compounds precipitate. Overall the highest percentage of protein was found to fall between 10 and 15 kDa. Glycerol was found in thin stillage at concentrations of 18.8 g/L and 63.2 g/L in CDS; while acetic acid was found in concentrations of 3.22 g/L in thin stillage and 10.82 g/L in CDS. Quantification of the physical properties and identification of the chemical properties paves way for exploration of new value added uses of thin stillage and CDS.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.