Small-Scale Extrusion of Corn Masa By-Products

dc.contributor.author Bern, Carl
dc.contributor.author Richard, Thomas
dc.contributor.author Rosentrater, Kurt
dc.contributor.author Flores, R.
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-02-13T03:52:17.000
dc.date.accessioned 2020-06-29T22:42:26Z
dc.date.available 2020-06-29T22:42:26Z
dc.date.embargo 2012-12-10
dc.date.issued 2005-01-01
dc.description.abstract <p>Corn masa by-product streams are high in fiber and are amenable for utilization in livestock feed rations. This approach is a potentially viable alternative to landfilling, the traditional disposal method for these processing residues. Suspended solids were separated from a masa processing waste stream, blended with soybean meal at four levels (0, 10, 20, and 30% wb), and extruded in a laboratory-scale extruder at speeds of 50 rpm (5.24 rad/sec) and 100 rpm (10.47 rad/sec) with temperature profiles of 80-90-100°C and 100-110-120°C. Processing conditions, including dough and die temperatures, drive torque, specific mechanical energy consumption, product and feed material throughput rates, dough apparent viscosity, and dough density, were monitored during extrusion. The resulting products were subjected to physical and nutritional characterization to determine the effects of processing conditions for these blends. Extrudate analysis included moisture content, water activity, crude protein, in vitro protein digestibility, crude fat, ash, product diameter, expansion ratios, unit and true density, color, water absorption and solubility, and durability. All blends were suitable for extrusion at the processing conditions used. Blend ratio had little effect on either processing parameters or extrudate properties; extrusion temperature and screw speed, on the other hand, significantly affected both processing and product properties.</p>
dc.description.comments <p>This article is from <em>Cereal Chemistry</em> 82, no. 4 (July/August 2005): 436–446, DOI: <a href="http://dx.doi.org/10.1094/CC-82-0436" target="_blank">10.1094/CC-82-0436</a>.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/abe_eng_pubs/76/
dc.identifier.articleid 1077
dc.identifier.contextkey 3525028
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_pubs/76
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/1558
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_pubs/76/Rosentrater_2005_SmallScaleExtrusionCorn.pdf|||Sat Jan 15 01:50:32 UTC 2022
dc.source.uri 10.1094/CC-82-0436
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.title Small-Scale Extrusion of Corn Masa By-Products
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication cbd58252-88a0-4555-b546-3613f558583e
relation.isAuthorOfPublication ae6468d9-2286-48ad-9293-5cfa893ea5f3
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
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