Rendering waste oil as a new source for the synthesis of emulsifier: optimization, purification, and characterization


GÖKSEL SARAÇ M. , DOĞAN M.

INTERNATIONAL JOURNAL OF FOOD ENGINEERING, vol.17, no.9, pp.715-725, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 17 Issue: 9
  • Publication Date: 2021
  • Doi Number: 10.1515/ijfe-2020-0250
  • Title of Journal : INTERNATIONAL JOURNAL OF FOOD ENGINEERING
  • Page Numbers: pp.715-725
  • Keywords: enzymatic glycerolysis, emulsifier, rendering waste oil, solvent, ultrasound, POLYUNSATURATED FATTY-ACIDS, ENZYMATIC GLYCEROLYSIS, PALM OLEIN, LIPASE, MONOACYLGLYCEROL, QUALITY, FOOD, SYSTEM

Abstract

The enzymatic glycerolysis conditions in the production emulsifier by using the rendering waste oil were optimized in the present study. The effects of changes in duration (1-27 h), temperature (50-80 degrees C), enzyme (5-20%), and glycerol (5-20%) concentration, addition of solvent (acetone, acetonitrile, chloroform, methanol, ethanol, and tert-butanol) and water addition (3.5% of glycerol rate), and ultrasound application on the enzymatic glycerolysis reaction medium for mono- and diglyceride production were investigated. After determining the optimum conditions, the effects of the ultrasonic bath on the physic-chemical and rheological properties of emulsifier, the oxidation tests were examined. Using the preparative column chromatography method, three different emulsifier compositions were achieved and named E100, E50-50, and E50-40-10 by their monoglyceride, diglyceride, and triglyceride contents, respectively. Then, the post-purification emulsion properties and rheological behaviors of emulsifier samples were determined. E50-40-10 emulsifier was found to be the best sample in terms of rheological properties and emulsion stability.