Article (Scientific journals)
Effects of Clostridium autoethanogenum protein inclusion levels and processing parameters on the physical properties of low-starch extruded floating feed
Ma, Shifeng; Wang, Hao; Yang, Jie et al.
2022In Aquaculture Reports, 23, p. 101030
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Keywords :
Clostridium autoethanogenum protein; Extrusion; Extrusion parameters; Feed qualities; Low-starch floating feed; Aquatic Science; Animal Science and Zoology
Abstract :
[en] Clostridium autoethanogenum protein (CAP, RichMore®, China) is a safe and effective alternative protein source. However, the physicochemical properties of CAP and the effects of CAP inclusion on the physical properties of extruded fish feed are still unclear. The extrusion trials were performed to investigate the effects of graded CAP substitution levels (replacing 0%, 25%, 50%, 75% and 100% of fishmeal in the diet), preconditioning moisture content (28% and 32%) and screw speed (200 rpm and 300 rpm) on the physical qualities of low-starch extruded floating feed. The results showed that CAP had high crude protein content (832 g/kg), low crude lipid content (19.0 g/kg) and low ash content (35.0 g/kg). The water-holding capacity, foaming capacity and foaming stability of CAP were significantly higher than those of low-temperature steam dried fish meal (LTFM) (P < 0.05). The floatability of all extruded feeds reached 100%. As the replacement level of CAP increased, the peak viscosity of the unprocessed diets increased significantly (P < 0.05), whereas the pasting temperature decreased significantly (P < 0.05). Specific mechanical energy significantly increased with the increase in CAP substitution level (P < 0.05) and decreased with the increase in screw speed and moisture content (P < 0.05). Dietary CAP inclusion significantly reduced the bulk density, water solubility index, water solubility and oil leakage (P < 0.05), significantly increased the expansion ratio, hardness, water absorption index and oil absorption (P < 0.05), and improved the microstructure of the feed. Moisture content and screw speed also had significant effects on the physical qualities of the extruded feed, and the recommended process parameters for the test diets are 28% moisture content and 300 rpm screw speed. Overall, CAP is a promising protein substitute in aquaculture, which can be used to manufacture high-quality low-starch extruded floating feed.
Disciplines :
Food science
Author, co-author :
Ma, Shifeng  ;  Université de Liège - ULiège > TERRA Research Centre ; National Aquafeed Safety Assessment Center, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing, China
Wang, Hao;  National Aquafeed Safety Assessment Center, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing, China
Yang, Jie;  National Aquafeed Safety Assessment Center, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing, China
Li, Junguo;  National Aquafeed Safety Assessment Center, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing, China
Xue, Min;  National Aquafeed Safety Assessment Center, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing, China
Cheng, Hongyuan;  National Aquafeed Safety Assessment Center, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing, China ; National food Institute, Technical University of Denmark, Lyngby, Denmark
Zou, Fangqi;  Beijing Shoulang Biotechnology Co., Ltd, Beijing, China
Blecker, Christophe ;  Université de Liège - ULiège > Département GxABT > Smart Technologies for Food and Biobased Products (SMARTECH)
Language :
English
Title :
Effects of Clostridium autoethanogenum protein inclusion levels and processing parameters on the physical properties of low-starch extruded floating feed
Publication date :
April 2022
Journal title :
Aquaculture Reports
eISSN :
2352-5134
Publisher :
Elsevier B.V.
Volume :
23
Pages :
101030
Peer reviewed :
Peer Reviewed verified by ORBi
Funding text :
This study was supported by the National Key Research and Development Program , China ( 2019YFD0900200 and 2018YFD0900400 ); National Natural Science Foundation , China ( 32172981 and 31902382 ); The Agricultural Science and Technology Innovation Program of CAAS , China ( CAAS-ASTIP-2017-FRI-08 ); and Postdoctoral Science Foundation , China ( 2021M703544 ).
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since 20 April 2022

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