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Immobilized Chlorella vulgaris as an alternative for the enhancement of microalgae oil and biodiesel production

Nur Hanani, Rushan and Nur Hidayah, Mat Yasin and Farhan, Mohd Said and Nagaarasan, Ramesh (2020) Immobilized Chlorella vulgaris as an alternative for the enhancement of microalgae oil and biodiesel production. Bulletin of Chemical Reaction Engineering & Catalysis, 15 (2). pp. 379-389. ISSN 1978-2993

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Microalgae are a promising alternative for biodiesel production and a valuable source of fatty acid methyl ester (FAME). In this research, Chlorella vulgaris has been chosen as the suitable microalgae because this species was able to produce highest oils for biodiesel processing. Previously, sodium alginate (SA) was used to entrap the microalgae in the culturing process due to its low toxicity and high transparency. However, SA have some disadvantages such as bead disruption which leading to the loss of microalgae cell. Therefore, this research has been conducted to evaluate the oil production of immobilised Chlorella vulgaris using different matric systems at different ratios which are 0.3:1, 1:1 and 2:1. Currently, six matric systems have been developed, they are SA as a control, a combination of SA and chitosan (SA+CT), SA and carrageenan (SA+CR), SA and gelatin (SA+GT), SA and calcium alginate (SA+CA), and SA and sodium carboxymethylcellulose (SA+CMC). The microalgae was first cultivated, harvested and extracted to produce oil, prior to use in the transesterification process. The SA+GT showed the highest oil yield with 59.14% and a total FAME of 0.56 mg/g. The FAME profile of oil extracted microalgae showed high potential for biodiesel production as it consisted of palmitic acid (C16:0), stearic acid (C18:0), oleic acid (C18:1), linoleic acid (C18:2) and linolenic acid (C18:3). The results proved that the combination of SA+GT had improved the oil yield and fatty acid composition as compared to the other matric systems, which may have useful application for the biodiesel industry.

Item Type: Article
Uncontrolled Keywords: Microalgae; Chlorella vulgaris; Immobilized; FAME; Oil yield; Matric systems
Subjects: T Technology > TP Chemical technology
Faculty/Division: Institute of Postgraduate Studies
Faculty of Chemical and Process Engineering Technology
Depositing User: Pn. Hazlinda Abd Rahman
Date Deposited: 12 May 2020 01:28
Last Modified: 12 May 2020 01:28
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