CRUDE GLYCEROL: BY-PRODUCT OF BIODIESEL INDUSTRIES AS AN ALTERNATIVE ENERGY SOURCE FOR LIVESTOCK FEEDING
Journal Title: Journal of Experimental Biology and Agricultural Sciences - Year 2017, Vol 5, Issue 0
Abstract
Increased concern on greenhouse gas emission, concomitant global warming and decreasing fossil fuels have created the necessity to find an alternative source of energy for the transportation vehicles. Biodiesels is an alternative renewable fuel source, which releases less carbon dioxide, carbon monoxide, sulfur and nitrogen oxides upon combustion. These environmental friendly features of biodiesel make it a potential alternative to the conventional one. Biodiesel can be extracted from the edible or non-edible source of triglycerides. During this extraction process, crude glycerol (CG) is obtained at the rate of 10% as a byproduct of trans-esterification reaction. Chemically, CG so obtained is composed of catalysts, salts and fatty acids. Purification of CG to <95% involves the cost (0.28 USD/L production) and time consuming process. Hence, economical management of CG is the need of hour, one such alternative way is its entry in animal food chain as an energy source. Basically, glycerol is a glycogenic intermediate product of fat digestion converted to glucose by the action of key enzyme glycerol kinase. The CG undergo glycolysis and TCA cycle to liberate ATP. The digestible and metabolizable energy content of CG are comparable with the commonly used cereal grains in livestock feeding. Thus, CG acts as a bridging gap between the biodiesel industry and livestock production. Studies have showed that CG can be used as an energy source as a replacement of cereals in pig, poultry, goat, feedlot cattle and dairy cows. This review provides an overview of utilization of CG and its effect on production performance of different livestock species.
Authors and Affiliations
Lokesha E, Marappan Gopi, Ramasamy Dhinesh Kumar, Brijesh Patel, Banakar PS, Revanasiddu Deginal, Pruthviraj DR, Bhanuprakash V, Mahesh MS
Keywords
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- EP ID EP427743
- DOI 10.18006/2017.5(6).755.766
- Views 79
- Downloads 0
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