Transesterification of used edible and non-edible oils to alkyl esters by Aspergillus sp. as a whole cell catalyst
✍ Scribed by Dr. Ranjana Prakash; Satnam S. Aulakh
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 242 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0233-111X
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✦ Synopsis
Abstract
Aspergillus sp. (MTCC 5436), isolated from contaminated clarified butter was used as a whole cell catalyst for transesterification of oils from different sources. The strain was observed to be tolerant and grow in 90% oil as carbon source. Oils of Jathropa, karanj and spent cottonseed were used as carbon sources in the study. The product, alkyl ester, was characterized and quantified using ^1^H‐NMR. The strain was observed to facilitate transesterification in an oil:minimal medium with the ratio of 70:30 resulting in a 98% conversion of oil to ethyl esters within 48 h at 28 °C and 120 rpm. The physico‐chemical characteristics of the ethyl ester (>98%) at 70% oil as carbon source were similar to the standards specified for biodiesel as per standards of American Society for Testing and Materials (ASTM) and Bureau of Indian Standards (BIS), India. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)