Twin-screw Extrusion Processing of Rainbow trout (Oncorhynchus mykiss) feeds using Graded Levels of High Protein Corn-based Distillers Dried Grains (HP-DDG) and Conventional Distillers Dried Grains with Solubles (DDGS) Fallahi, Parisa Rosentrater, Kurt Rosentrater, Kurt Muthukumarappan, Kasiviswanathan
dc.contributor.department Agricultural and Biosystems Engineering 2018-02-13T03:52:50.000 2020-06-29T22:35:57Z 2020-06-29T22:35:57Z Sun Jan 01 00:00:00 UTC 2012 2012-12-10 2012-07-01
dc.description.abstract <p>Twin-screw extrusion cooking trials were performed to investigate the differential effects of conventional DDGS (DDGS) and HP-DDG inclusion, as fishmeal replacers, on physical properties (moisture content, water activity, thermal properties, expansion ratio, unit density, bulk density, water absorption, solubility and pellet durability indices, and color) of Rainbow trout (Oncorhynchus mykiss) feed. Four ingredient blends were formulated with 20 and 40% C- DDGS, and 20 and 40% HP-DDG, along with other required dietary ingredients. Each diet was extruded using two replications; a fishmeal based diet acted as the control diet. The highest and the lowest extrudate moisture content and water activity were observed for the diets containing 20% DDGS and 40% HP-DDG, respectively. Compared to the control diet, increasing HP-DDG content from 20 to 40% had no effect on the bulk density of the products, while increasing DDGS content from 20-40% led to a considerable rise in bulk density of the extrudates by 14.2 and 6%, respectively. Also, extrudates with the lowest brightness, greenness, and yellowness values were obtained from the diet containing 20% DDGS, whereas the most color intensity values were observed for the diets containing 40% DDGS and 20% HP-DDG. Increasing DDGS and HP-DDG from 0-40% caused a remarkable increase in water absorption index, by 72 and 30%, respectively. Likewise, the water solubility index increased, but in a considerably lesser order of magnitude. High pellet durability index of more than 99% was achieved with inclusion of either DDGS or HP-DDG. None of the diets impacted the thermal properties of the extrudates. Inclusion of 20 and 40% DDGS resulted in the extrudates with the largest and the smallest unit density values of nearly 887 and 750 kg/m3, respectively. As was expected, expansion ratio decreased with increasing unit density. Increasing inclusion levels of HP-DDG did not show any effect on unit density or expansion ratio of the products. Future research should concentrate on investigating the effects of both extrusion processing and graded levels of different types of DDGS on Rainbow trout feeds.</p>
dc.description.comments <p>This is an ASABE Meeting Presentation, Paper No. <a href="" target="_blank">121337570</a>.</p>
dc.identifier archive/
dc.identifier.articleid 1095
dc.identifier.contextkey 3525237
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_conf/96
dc.language.iso en
dc.source.bitstream archive/|||Sat Jan 15 02:34:59 UTC 2022
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.keywords Alternative protein
dc.subject.keywords Aquaculture
dc.subject.keywords Ethanol co-product
dc.subject.keywords Extrudate
dc.subject.keywords High protein
dc.subject.keywords Trout
dc.title Twin-screw Extrusion Processing of Rainbow trout (Oncorhynchus mykiss) feeds using Graded Levels of High Protein Corn-based Distillers Dried Grains (HP-DDG) and Conventional Distillers Dried Grains with Solubles (DDGS)
dc.type article
dc.type.genre conference
dspace.entity.type Publication
relation.isAuthorOfPublication ae6468d9-2286-48ad-9293-5cfa893ea5f3
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
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