Characterization of light gluten and light steep water from a corn wet milling plant

K. D. Rausch, C. I. Thompson, R. L. Belyea, M. E. Tumbleson

Research output: Contribution to journalArticlepeer-review


The primary commodity of corn wet milling is starch, but two coproducts (corn gluten feed, CGF and corn gluten meal, CGM) also are produced. CGM and CGF are marketed as animal foodstuffs and are important economically; however, variation in composition reduces quality. There are few data on the effect of composition of the parent process streams, light steep water (LSW) and light gluten (LG), respectively, on composition of CGF and CGM. The objective was to characterize LG and LSW. Samples of LG and LSW were collected: (1) hourly for one day, (2) every 3 h for 3 days, and (3) daily for 3 weeks. Dry matter, N and ash were determined. Variation in composition of LG and LSW was greatest during longer periods of time (days and weeks) rather than shorter (hourly or every 3 h). There was significant variation in DM (solids) content, which directly affected the concentration of other components. Variation in N (protein) of LG and LSW accounted for much of the variation in CGF and CG. Processes that modify processing and reduce variation could increase the quality of CGF and CGM.

Original languageEnglish (US)
Pages (from-to)49-54
Number of pages6
JournalBioresource Technology
Issue number1
StatePublished - Oct 2003


  • Chemical composition
  • Coproducts
  • Corn gluten feed
  • Corn gluten meal
  • Corn wet milling

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal


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