Enzymatic esterification of pre-treated and untreated acid oil soapstock

• Type: Article in International Conference Proceedings Book
• Date: 2018

Authors

Borges, J (Author) Other; Alvim Ferraz, C (Author) Other; Manuel Fonseca Almeida (Author) FEUP; Joana Dias (Author) FEUP; Budzaki, S (Author) Other

Conference proceedings International

Title: WASTES - SOLUTIONS, TREATMENTS AND OPPORTUNITIES II

Pages: 241-244

4th International Conference on Wastes - Solutions, Treatments and Opportunities

Univ Porto, Fac Engn, Porto, PORTUGAL, SEP 25-26, 2017

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Other information

Authenticus ID: P-00P-NKS

DOI: 10.1201/9781315206172-38

Abstract (EN): The soapstock oil presents high Free Fatty Acid (FFA) content, being potentially a sustainable alternative feedstock for biodiesel production. In the present work, enzymatic esterification using a suspension of Thermomyces lanuginosus lipase was conducted on pre-treated and untreated acid oil from soapstock derived from the refining of vegetable oil mixtures. The enzyme suspension was prepared by mixing it with a 1 M phosphate buffer (1: 10 V/V, enzyme: buffer). Esterification was conducted in an orbital shaking incubator at 40.0 degrees C using a molar ratio of acid to methanol of 1: 3, during 24 h at 200 rpm; monitoring was performed at 0, 7 and 24 h. Around 80% FFA reduction was obtained using raw and pre-treated oil, showing that the use of suspended enzyme avoids the need for pretreatment. Fatty Acid Methyl Ester content was determined, indicating that both esterification and transesterification reactions occurred.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4