The objective of this series of studies is to describe the contribution of causative
factors that contribute to the physical quality of animal feed pellets. In this first article,
criteria for pellet quality are evaluated. An overview is given of the binding mechanisms
involved in pelleted feeds. In addition, different devices are discussed that are used in
the compound feed industry to evaluate the hardness and durability of the pellets. Some
general recommendations are given on what should be taken into account when using
the different methods with which pellet quality can be evaluated.
In a second article and third article (Thomas et al., 1996a,b), the physical quality of
pellets is discussed in view of the contribution of raw materials and their components to
the desired properties of pelleted animal feeds. Furthermore, the effect of unit operations
in preparing animal feeds (conditioning, pelleting and cooling/drying) and some of their
inherent process variables are discussed.
2.
The objective of this series of studies is to describe the contribution of causativefactors that contribute to the physical quality of animal feed pellets. In this first article,criteria for pellet quality are evaluated. An overview is given of the binding mechanismsinvolved in pelleted feeds. In addition, different devices are discussed that are used inthe compound feed industry to evaluate the hardness and durability of the pellets. Somegeneral recommendations are given on what should be taken into account when usingthe different methods with which pellet quality can be evaluated.In a second article and third article (Thomas et al., 1996a,b), the physical quality ofpellets is discussed in view of the contribution of raw materials and their components tothe desired properties of pelleted animal feeds. Furthermore, the effect of unit operationsin preparing animal feeds (conditioning, pelleting and cooling/drying) and some of theirinherent process variables are discussed.2.
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