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Membrane separation of solids from corn processing streams.

Tricia L Templin1, David B Johnston, Vijay Singh

  • 1Agricultural and Biological Engineering Department, University of Illinois, Urbana, 61801, USA.

Bioresource Technology
|August 3, 2005
PubMed
Summary
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Microfiltration and ultrafiltration show potential for modifying corn processing streams. These technologies can alter water, protein, and ash content, improving coproduct quality.

Area of Science:

  • Agricultural science
  • Food science
  • Chemical engineering

Background:

  • Corn processing streams have high water content, posing challenges for water removal and solid recovery.
  • Improving coproduct quality and reducing process variability necessitates advanced separation technologies.

Purpose of the Study:

  • To evaluate the efficacy of microfiltration and ultrafiltration in modifying corn processing streams.
  • To assess the impact of these filtration systems on water, protein, and ash content.

Main Methods:

  • Corn was processed using conventional (SO(2) steeping) and enzymatic methods.
  • Microfiltration and ultrafiltration were applied to different corn processing streams.
  • Analysis included water content, total solids, protein, and ash concentration.

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Main Results:

  • Ultrafiltration had minimal impact on water removal and solids recovery in steeped corn streams.
  • Microfiltration of protein streams showed higher solids and ash in permeate.
  • Protein recovery differed: retentate for conventional process, permeate for enzymatic process.
  • Enzymatic processing led to smaller protein sizes in the stream.

Conclusions:

  • Microfiltration and ultrafiltration can alter the composition of corn processing streams.
  • Enzymatic processing combined with microfiltration influences protein and ash partitioning.
  • These filtration techniques offer potential for enhancing coproduct value in corn processing.