Enzymatic esterification of pre-treated and untreated acid oil soapstock

• Type: Chapter or Part of a Book
• Date: 2018

Authors

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

Book

Title: Book of proceedings of Wastes: Solutions, Treatments and Opportunities II

Pages: 241-244

ISBN: 978-1-138-19669-8

Publisher: Taylor & Francis

Indexing

ISI Web of Science

Scopus

Other information

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°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. © 2018 Taylor & Francis Group, London, UK.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4