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Dehydrated and Extruded Chitosan-Produced Secondary Poultry Nutrients (SPN) as Broiler Feedstuffs

Department of Animal Sciences, University of Missouri, Columbia, MO 65211; Phone: (573) 882-6754; FAX: (573) 882-6827

J. J. Lyons

An alternate coagulant-flocculent system using volclay, polysolisic acid, and chitosan was used to remove secondary poultry nutrients (SPN) from the wastewater stream of a turkey processing plant. The solids were dehydrated and/or extruded, producing different types of SPN samples. They were tested at levels up to 15% in broiler starter diets.

In Experiment 1, broiler body weight at 3 wk was depressed (P>. 05) at all levels of SPN feeding, and feed conversion was significantly increased. In Experiment 2 (using extruded SPN products); no significant differences were detected among the diets. In Experiment 3, body weights at 3 wk were depressed for SPN contributions above 6% for the non-pre-dried, extruded SPN product (SPN-EXT). Feed conversion was not significantly increased by the SPN from products which had been partially dried prior to extrusion. SPN can be used at levels up to 4% in broiler diets without affecting either body weight or feed conversion.

Key Words: Chitosan • extrusion • fluidized bed dehydrator • secondary poultry nutrients • wastewater treatment