Starch source, screw configuration and injection of steam into the barrel affect the physical quality of extruded fish feed
By M. Sørensen, Giao Nguyen, Trond Storebakken, M. Øverland. 2010
104 citations recorded by the source corpus.
This experiment investigated the physical qualities (‘Holmen’ durability; ‘tumbling box’ durability; and pellet strength, length and diameter) of extruded fishmeal-based feeds produced using different starch sources, screw configurations, with or without steam injected in the barrel. The starch sources tested were native or pre-gelatinized potato starch (PGS), wheat starch (WS), whole wheat (WW) or a combination of WS and WW. Screw configurations were a polygon element, followed by two left-pitched segments, Polygon_2L; a polygon, followed by one left-pitched and one right-pitched element, Polygon_LR; and no polygon section, alternating left- and right-pitched elements, LRLR. Starch source and screw configuration affected the physical quality the most. Pellets produced with LRLR had the highest ‘Holmen’ durability (76%), hardness (30 N) and the least diameter (5.3 mm). The lowest durability (37%) and hardness (22 N) were obtained with Polygon_LR. Potato starch yielded higher expansion than cereal starch. The highest ‘Holmen’ durability was seen for PGS (79%), while WS yielded the lowest value (44%). Injection of steam reduced hardness and ‘Holmen’ durability, but provided a minor overall contribution to physical quality compared with the starch source and screw configuration. ‘Holmen’ durability appeared to be suitable to unveil variation (37–79%) in physical quality, while ‘Tumbling box’ durability (98.4–98.8%) did not prove efficient.
Subfields: Animal Science and Zoology, Food Science, Nutrition and Dietetics
View Paper: https://www.semanticscholar.org/paper/0628a179730908b5ba23eb50a38786f0c7b98fa8
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In Animal Science and Zoology
Citations in the corpus
- Sodium diformate and extrusion temperature affect nutrient digestibility and physical quality of diets with fish meal and barley protein concentrate for rainbow trout (Oncorhynchus mykiss) (2011, background): “Cereal grains are commonly included in diets for carnivorous fish to facilitate binding in extruded diets (Sørensen et al., 2010), but the inclusion level is limited by low nutrient density and the poor ability of these fish to digest and metabolize starch (Krogdahl et al., 2005).”