Enzymatic Dry Grind Corn Process Using a New Enzyme

Ping Wang, Li Xu, David B. Johnston, Kent D. Rausch, M. E. Tumbleson, Vijay Singh

Research output: Contribution to conferencePaperpeer-review


A new low temperature liquefaction and saccharification enzyme (GA2) was used in enzymatic dry grind corn process (E-Mill). E-Mill process was compared with conventional dry grind corn process using GA2 with same process parameters. Sugar, ethanol, glycerol and organic acid profiles and coproducts yields were investigated. Differences were observed in glucose profiles for the two processes. Final ethanol concentration of E-Mill process was 15.5% (v/v) which was 9.2% higher than conventional process. Fermentation rate was also higher for E-mill process. Ethanol yields of E-Mill and conventional processes were 2.8 and 2.9 gal/bushel, respectively. Three additional coproducts, germ 8.0% (db), pericarp fiber 7.7% (db) and endosperm fiber 5.2% (db) were produced in addition of DDGS with the E-Mill process. DDGS generated from the E-MiII process was 66% less than the conventional process.

Original languageEnglish (US)
StatePublished - 2005
Event2005 ASAE Annual International Meeting - Tampa, FL, United States
Duration: Jul 17 2005Jul 20 2005


Other2005 ASAE Annual International Meeting
Country/TerritoryUnited States
CityTampa, FL


  • Corn
  • Ddgs germ
  • Dry grind corn process
  • Endosperm fiber
  • Enzymatic dry grind corn process
  • Ethanol
  • Pericarp fiber

ASJC Scopus subject areas

  • General Agricultural and Biological Sciences
  • Bioengineering


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