Effect of processing conditions of hydrolysed feaher meals meals on the energy requirements and quality parameters.

Abstract: Chicken feather meal represents a large potential source of protein for feed use. In Egypt, the volume of available dry feathers annually at processing plants has been estimated as 0.70 million tons (Ministry of Agriculture, 2001), which if made available for feed use, could do much to supply amino acids in poultry diets. The present study was undertaken to investigate the effect of processing conditions of feather meals such as, steam pressures (225,275,325 and 375 kPa), heating times (15,30,45 and 60 min), and two different treatments of feather (chopped and complete) on the energy requirements, and cost analysis of feather meals. Feather meals qualities of the tested methods were also considered.
The maximum machine productivity were obtained under 375 kPa steam pressure for 60 min of cooking time during milling chopped feathers which were 0.429 ton/h. Milling chopped feather, at steam pressures of 225 kPa and cooking time of 15 min the total consumed specific energy (kW.h/ton) for feather milling were reduced by about 48.8 % than that needed when processing complete feathers. Meanwhile, at higher steam pressures of 375 kPa and 15 min of cooking time, the total consumed specific energy for feather milling reduced with about of 74.8% than that using a complete feather. Increasing of steam pressures and cooking times for autoclaving chopped feathers resulted in a gradually increase in the chemical composition of (CP, EE and ash), and a slightly higher values for amino acids recovery of feathers. The results of the analysis of variance indicated that best ever result was obtained at 225 kPa of steam pressure and 60 minutes of cooking time. At these levels maximum protein (CP) content (89.213 and 89.197 %)., for chopped and complete feathers respectively were obtained. Processing costs for producing one tonne of feather meals using complete feathers is about 18.3 % larger than that the chopped feathers
Publication year 2002
Pages 173-186
Availability location معهد بحوث الهندسة الزراعية
Availability number
Organization Name
serial title مؤتمر العاشر الجمعيه المصريه للهندسه الزراعية
Department Animal production Mechanization
Author(s) from ARC
External authors (outside ARC)
    حمدي عبد العزيز أبو خشبه باحث بمعهد بحوث الإنتاج الحيواني – قسم تغذية الدواجن
Agris Categories Agricultural engineering
Proposed Agrovoc HYDROLYSED ;MEALS ;
Publication Type Conference/Workshop
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