Twin-screw Extrusion Processing of Vegetable-based Protein Feeds for Yellow Perch (Perca flavescens) Containing Distillers Dried Grains, Soy Protein Concentrate, and Fermented High Protein Soybean Meal

Abstract

Changing to alternative protein sources supports production of more economic aquafeeds. Two isocaloric (3.06 kcal/g) and isonitrogenous (40% db) experimental feeds for juvenile yellow perch were formulated with incorporation of fermented soybean meal (FSBM) and soy protein concentrate (SPC), each of which were at two levels (0 and 20% db), along with constant amounts of high protein distillers dried grains (DDG) (~30% db), and appropriate amounts of other ingredients. Using a pilot scale twin-screw extruder, feed production was performed in two replications for each diet at conditioner steam levels of 0.11 to 0.16 kg/min, extruder water of 0.11 to 0.19 kg/min, and screw speeds of 230 to 300 rpm. The effects of SPC and FSBM inclusion on extrudate physical properties were compared with those of a control diet (which contained 20% fishmeal and 30% DDG). Inclusion of 20% FSBM and 20%SPC resulted in a substantial decrease in unit density by 9.2 and 24%, but an increase in lightness, greenness, yellowness, and expansion ratio of the extrudates by 7, 27, 14, 7, 17, 34, 15, and 16.5%, respectively. SPC inclusion led to a considerable increase in water absorption, thermal resistivity, and thermal diffusivity by 17.5, 6.3, and 17.6%, respectively, whereas no significant change was observed for these properties with incorporation of 20% FSBM. Additionally, all extruded products had high durability. Taken together, using ~30% DDG with20% FSBM or20% SPC as alternative protein sources resulted in viable extrudates with properties appropriate for yellow perch production. A future study investigating the effect of extrusion processing conditions on the production of complete vegetable-based protein feeds for yellow perch species would be appropriate. of Food Research; Vol. 1, No. 3; 2012 ISSN 1927-0887 E-ISSN 1927-0895 Published by Canadian Center of Science and Education 230 AbstractChanging to alternative protein sources supports production of more economic aquafeeds. Two isocaloric (3.06 kcal/g) and isonitrogenous (40% db) experimental feeds for juvenile yellow perch were formulated with incorporation of fermented soybean meal (FSBM) and soy protein concentrate (SPC), each of which were at two levels (0 and 20% db), along with constant amounts of high protein distillers dried grains (DDG) (30% db), and appropriate amounts of other ingredients. Using a pilot scale twin-screw extruder, feed production was performed in two replications for each diet at conditioner steam levels of 0.11 to 0.16 kg/min, extruder water of 0.11 to 0.19 kg/min, and screw speeds of 230 to 300 rpm. The effects of SPC and FSBM inclusion on extrudate physical properties were compared with those of a control diet (which contained 20% fishmeal and 30% DDG). Inclusion of 20% FSBM and 20%SPC resulted in a substantial decrease in unit density by 9.2 and 24%, but an increase in lightness, greenness, yellowness, and expansion ratio of the extrudates by 7, 27, 14, 7, 17, 34, 15, and 16.5%, respectively. SPC inclusion led to a considerable increase i...

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)

“…Looking at data presented in Table 4, the extrudates with higher BD also had relatively higher WAI. It was in contrast with our observations in a previous twin-screw extrusion study performed for soy-protein based Yellow perch diet (Fallahi et al, 2012). Also, there was no relation between the ER and WAI of the extrudates.…”

“…The lowest α value of 0.15 was related to the less expanded extrudates containing 20% DDGS with ER of 1.043. This was in agreement with our observations in another study conducted for soybean meal-based Yellow perch extruded diets (Fallahi et al, 2012). These results can be ascribed to the higher porosity of the more expanded extrudates and the higher thermal diffusivity of the trapped air in the pores compared to those of the protein and starch (Mariam et al, 2008).…”

Effect of feed moisture, extrusion temperature and screw speed on properties of soy white flakes based aquafeed: a response surface analysis

“…Soy white flakes and high protein–distiller dried grains (HP‐DDG) contains a high amount of protein and are thus a possible alternative source of protein for aquaculture feeds . Use of soy products like full fatted soybean meal, defatted toasted soybean meal (SBM) and defatted untoasted soybean meal or white flakes (WF) is becoming common . Romarheim et al found that extrusion of WF diet increased the digestibility of protein and all amino acids whereas extrusion of fishmeal and SBM had no significant effect on amino acid digestibility.…”

“…16 -20 Use of soy products like full fatted soybean meal, defatted toasted soybean meal (SBM) and defatted untoasted soybean meal or white flakes (WF) is becoming common. 17,18,21 Romarheim et al 22 found that extrusion of WF diet increased the digestibility of protein and all amino acids whereas extrusion of fishmeal and SBM had no significant effect on amino acid digestibility. Distillers dried grains (DDG) and distillers dried grains with solubles (DDGS), a co-product from corn-based dry grind fuel ethanol manufacturing, is also viable protein source.…”

Characteristics of Vegetable‐Based Twin‐Screw Extruded Yellow Perch (Perca flavescens) Diets Containing Fermented High‐Protein Soybean Meal and Graded Levels of Distillers Dried Grains with Solubles

“…Later on, they also attempted to quantify the processing behavior of the DDGS-based blends for Nile tilapia by measuring processing parameters such as mass flow rate, net torque required, specific mechanical energy consumption, and apparent viscosity (Chevanan et al 2010). To our knowledge, only Fallahi et al (2012) have studied the effect of microbial-fermented soybean meal inclusion on extruded yellow perch diet physical properties. Ayadi et al (2011b) achieved high-quality DDGS-based extrudates for yellow perch at inclusion levels of less than 50% by using a single-screw extruder.…”