Abstract
This study presents utilization of the inedible by-product fat of the municipal massacres to formulate bio-based lubricant grease. Inedible animal fat of acceptable quality has been recovered through the wet rendering process. The recovered fat was sterilized and bleached using 200 ppm chlorine dioxide solutions. The acceptable saponification and iodine values of the fat emphasize that it can be used in the chemical industry as an oleochemical resource. The fat was fractionalized into two fractions; stearic and oleic. The lithium soap of the stearic fraction was employed as a thickener and the oleic fraction has been adapted for use as base oil, depending on its proportion of combination compared to the thickener. It was found that the ideal composition of the formulated bio-grease is 15-20 % thickener to 85-80 % base oil. The performance testing shows that the formulated grease has NGLI ranges between 2- 3. The grease can be utilized as a lubricant agent in machinery and gears with an acceptable lubricating performance.
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