Effect of crude glycerol from South African biodiesel production on growth, carcass characteristics and pork quality of pigs

Abstract

________________________________________________________________________________ AbstractA study was carried out to evaluate the effects of dietary inclusion of crude glycerol as a partial replacement of maize at 50 g/kg and 100 g/kg in pig grower diets. Three experimental diets were formulated, a control (CN) and two diets containing 50 g/kg (low glycerol (LG)) and 100 g/kg (high glycerol (HG)) glycerol. The experimental diets were fed in a growth and carcass evaluation study to 60 Large White crossbred pigs (30 males and 30 females) weighing 21 ± 1.6 kg. There were no differences between the glycerol inclusion levels in daily gain, feed intake and feed conversion ratio and carcass traits of the pigs. Gilts had a higher dressing percentage and lower backfat thickness than boars. They also had shorter carcasses and a lower drip loss percentage than boars. There were no differences in thawing, drip, evaporation and total cooking losses of pork loin chops between treatments. It was concluded that crude glycerol can be included up to 100 g/kg in grower pig diets without any negative effects on pig performance.

Fat, meat quality and sensory attributes of Large White × Landrace barrows fed with crude glycerine

“…In addition, since fat composition closely depends on the fatty acid profile of the diet, the feed ingredients added will determine the fat quality, glycerol is an important structural component of triglycerides and phospholipids that can act as an intermediate in the lipogenesis pathway and yield energy through the citric acid cycle (Duttlinger et al, 2012). On the other hand, crude glycerine could also been source of fatty acid per se, as previous studies found that crude glycerine could contain 56% of fatty acids, mainly unsaturated (Chiloane et al, 2013). So the meat fatty acid profile could be influenced by a remainder of fatty acid in crude glycerine.…”

Effect of Harvesting Time, Drying Method and Packaging of Cowpea Leaves on Microbial Contamination

“…This could have been due to differences in moisture content between the two packaging materials. A study by Bhila [57] reported that sun drying reduced microbial load in beetroot and the total bacterial counts were high in beetroots compared to cabbage. By affecting the degrees of moisture retention after drying and the degree of contamination during the drying process, drying methods have an impact on microbial development [58].…”