Abstract
A study was conducted to evaluate the effect of crude glycerin on slaughter weight and carcass characteristics of broilers. Total of 180 male Ross - 308 day old chicks were allocated to 3 treatments with 4 replicates in a completely randomized design. The dietary treatments were: diet without crude glycerin inclusion (T1), diet with 5% crude glycerin inclusion from waste vegetable oil (T2), and diet with 5% crude glycerin inclusion from palm oil (T3). On day 42, twenty chickens per treatment were randomly sampled and slaughtered to determine the carcass characteristics. From the study, both crude glycerins did not give any effect on the slaughter weight and carcass characteristics, but broilers received crude glycerin had higher abdominal fat (p < 0.001) than control. Drip loss, cooking loss, pH, and meat color were not influenced by both types of crude glycerin, however, the skin color was significantly affected by palm oil crude glycerin inclusion (p < 0.05). Furthermore, meat from broilers with crude glycerin had higher lipid oxidation than control (p < 0.001). In conclusion, crude glycerins could be added in broiler’s diet, however its effect on increasing fat and lipid oxidation must be taken into concern.
Highlights
Crude glycerin is the main co-product from biodiesel production with low commercial value due to it has contaminants around 20 to 60%, such as, methanol, sodium, potassium, fatty acids, and moisture contents (Min, Yan, Liu, Coto, & Waldroup, 2010)
This study aimed to compare crude glycerin originated from palm oil which is derived from large scale producer (New Biodiesel Co., Ltd., Surat thani province) and wasted vegetable oil from medium scale producer (R&D Center for Alternative energy Faculty of Engineering, Prince of Songkla University, Songkhla Province) and evaluate its effects on carcass characteristics and meat quality
Crude glycerin inclusion in the diet did not give any effect to slaughter weight
Summary
Crude glycerin is the main co-product from biodiesel production with low commercial value due to it has contaminants around 20 to 60%, such as, methanol, sodium, potassium, fatty acids, and moisture contents (Min, Yan, Liu, Coto, & Waldroup, 2010). It contained 3100 to 6021 GE kcal kg-1 or 2535 to 5206 ME kcal kg-1 (Kerr, Weber, Dozier III, & Kidd, 2009) which could be mixed in the diets as energy source for livestock.
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