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Assessment of waxy and non-waxy corn and wheat cultivars as starch substrates for ethanol fermentation

  • František Gago EMAIL logo , Viera Horváthová , Vladimír Ondáš and Ernest Šturdík
Published/Copyright: November 15, 2013
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Chemical Papers
From the journal Chemical Papers Volume 68 Issue 3

Abstract

The amylose/amylopectin ratio in cereal substrates is one of the parameters affecting starch hydrolysis and fermentation process. Waxy (less than 1 mass % of amylose) starch seems to be suitable for improving the fuel ethanol production. The main aim of this paper was to characterize the fermentation performance of corn and wheat waxy and non-waxy cultivars in terms of simultaneous saccharification and fermentation (SSF) as well as of the separated hydrolysis and fermentation (SHF) type. Two corn (waxy and non-waxy) and two wheat (waxy and non-waxy) cultivars were used for the comparison applying separate enzymatic hydrolysis and fermentation. In the SHF process, the glucose content was higher after saccharification in the waxy corn and wheat compared to that in non-waxy corn and wheat. In the SSF of waxy varieties, the glucose content after the pre-saccharification was also higher than in the non-waxy ones. Although the starch content did not vary significantly, differences in the glucose content after saccharification were observed. The ethanol yield obtained after the distillation of mash varied from 229.2–262.3 L per ton for the SHF fermentation, while it was in the range of 311.5–347.9 L per ton for the SSF process.

Keywords: waxy starch; corn; wheat; ethanol fermentation; simultaneous saccharification and fermentation; separated hydrolysis and fermentation

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Published Online: 2013-11-15
Published in Print: 2014-3-1

© 2013 Institute of Chemistry, Slovak Academy of Sciences

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https://doi.org/10.2478/s11696-013-0454-1
Keywords for this article
waxy starch; corn; wheat; ethanol fermentation; simultaneous saccharification and fermentation; separated hydrolysis and fermentation

Articles in the same Issue

  1. Analytical protocol for investigation of zinc speciation in plant tissue
  2. Assessment of waxy and non-waxy corn and wheat cultivars as starch substrates for ethanol fermentation
  3. Effect of quaternary ammonium silane coating on adhesive immobilization of industrial yeasts
  4. Modeling of supercritical fluid extraction of flavonoids from Calycopteris floribunda leaves
  5. Determination of limiting current density for different electrodialysis modules
  6. Dyeing of multiple types of fabrics with a single reactive azo disperse dye
  7. Physicochemical fractionation of americium, thorium, and uranium in Chernozem soil after sharp temperature change and soil drought
  8. Ultra-trace determination of Pb(II) and Cd(II) in drinking water and alcoholic beverages using homogeneous liquid-liquid extraction followed by flame atomic absorption spectrometry
  9. Synthesis, thermal stability, electronic features, and antimicrobial activity of phenolic azo dyes and their Ni(II) and Cu(II) complexes
  10. Inhibition of copper corrosion in acidic sulphate media by eco-friendly amino acid compound
  11. Formation of nanostructured polyaniline by dopant-free oxidation of aniline in a water/isopropanol mixture
  12. Total synthesis of cannabisin F
  13. Design and synthesis of novel thiopheno-4-thiazolidinylindoles as potent antioxidant and antimicrobial agents
  14. Microwave-assisted synthesis and antibacterial activity of derivatives of 3-[1-(4-fluorobenzyl)-1H-indol-3-yl]-5-(4-fluorobenzylthio)-4H-1,2,4-triazol-4-amine
  15. DFT study on [4+2] and [2+2] cycloadditions to [60] fullerene
  16. Efficient thioacetalisation of carbonyl compounds
  17. Trimerization of aldehydes with one α-hydrogen catalyzed by sodium hydroxide
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