Type and processing method on the chemical comparison of hatcher wastes

Chemical composition of the different types of hatcher wastes from commercial egg-type hatchery and the processing method for feedstuff were composed. The experimental design was a 3*2 Factorial arrangement in CRD. The 3 types of hatchery wastes were dead-in-shell chicks, culling chicks and chick downs with 2 processing methods being a dry cooking method at 100 deg C for 1 hour and a pressure cooking method at 15 psi for 30 minutes. The results indicated that the type of hatchery wastes were significantly different on the whole of chemical composition (P0.01). The chick downs had the highest content of moisture, crude protein and gross energy followed by culling chicks and dead-in-shell chicks, respectively (P0.01). The 3 types of hatchery wastes contained crude protein and gross energy average of 77.68 percent and 5,938.68 kcal/kg for chick downs, 63.02 percent and 5,336.79 kcal/kg for culling chicks and 38.78 percent and 3,603.72 kcal/kg for dead-in-shell chicks, respectively. The chick downs had the lowest content of ether extract, crude fiber, nitrogen free extract, ash and phosphorus (P0.01). The culling chicks had the highest content of phosphorus but were the lowest on calcium (P0.01). The dead-in-shell chicks and the highest content of crude fiber, ash and calcium and were the lowest on moisture (P0.01). The processing method was not significantly different on the content of crude protein and gross energy including the other compositions of hatchery wastes except for ether extract and nitrogen free extract (P0.01). The dry cooking method left a higher content of ether extract than the pressure cooking method but it left a lower content of nitrogen free extract than the pressure cooking method (P0.01). The type of hatchery wastes and processing method had a combined effect on the content of crude protein (P0.05) including the content of moisture, ether extract and nitrogen free extract (P0.01) but did not effect on gross energy and the other compositions of hatchery wastes. The chick downs, culling chicks and dead-in-shell chicks were the sources of crude protein and gross energy and could be used as a replacer for the expensive feedstuff.