In:
Journal of the American Oil Chemists' Society, Wiley, Vol. 91, No. 1 ( 2014-01), p. 133-141
Abstract:
Whole dead poultry birds obtained from commercial layer farms were assessed for fat in the whole carcass and then dry rendered in three different rendering regimens T 1 , T 2 and T 3 (temperature = 120, 130 and 140 °C and shell pressure = 1, 2 and 3 kg/cm 2 respectively) and the effect on the yield and quality of the rendered chicken oil were studied. The overall fat percentage of the whole dead poultry carcass was 14.55 ± 0.17 % and the fat content of ‘greaves’ was 14.49 ± 0.38 %. In the dry batch rendering trials, the mean overall fat recovery was 24.46 ± 1.19, 26.78 ± 3.14 and 22.42 ± 2.32 % and the overall fat yield was 3.52 ± 1.72, 3.84 ± 0.44 and 3.22 ± 0.33 % of the carcass weight in T 1 , T 2 and T 3 respectively. Solvent extraction of fat could recover 96.10 ± 0.14 % of fat from ‘greaves’ which was significantly higher than the mechanical centrifugation method. Among the quality characteristics of the rendered chicken oil (RCO), moisture content ranged from 0.61 % (T 2 ) to 1.09 % (T 1 ) and the mean specific gravity was 0.91 at 30 °C. The FFA values of RCO obtained from the T 3 rendering regimen were significantly ( p 〈 0.05) higher than the FFA values of T 2 and T 1 . The mean acid value, iodine number, peroxide value, saponification value and unsaponifiable matter present in RCO showed no significant difference. The fatty acid profile and calorific values were studied. The RCO was converted to biodiesel by transesterification and the physico‐chemical properties of the biodiesel were studied and compared with the Indian biodiesel specification.
Type of Medium:
Online Resource
ISSN:
0003-021X
,
1558-9331
DOI:
10.1007/s11746-013-2346-5
Language:
English
Publisher:
Wiley
Publication Date:
2014
detail.hit.zdb_id:
2041388-9
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