Green technology for extracting coffee oil and biodiesel production: An application of spent coffee ground management approach

Erdawati; Elsa Vera Nanda; Teuku Afrizal; Jumadil Saputra; Shamsul Bahri Abd Razak

Green technology for extracting coffee oil and biodiesel production: An application of spent coffee ground management approach

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Erdawati, Elsa Vera Nanda, Teuku Afrizal, Jumadil Saputra, Shamsul Bahri Abd Razak

2021 Proceedings of the International Conference on Industrial Engineering and Operations Management Conference paper Cited by 1 SDG 17SDG 12

Abstract

Spent Coffee Ground (SCG) was studied as a potential source of oil feedstock for biodiesel production as an alternative waste utilization instead of disposed of as municipal waste. This study using microwave-assisted extraction (MAE). The optimal condition of MAE obtains of n-hexane (4v/v) as extraction solvent, microwave power 460 W, solvent to the material ratio eight mL/g, extraction temperature 72℃, and time 42 min. The oil yield of 24.70 % reaches under optimum conditions. Free fatty acids (FFA) of the extracted oil are converted into fatty acid methyl ester (FAME) by base-catalyzed esterification. The study investigates the effect of temperature, FFA ratio to methanol-CaO solution, and reaction time either. With one step alkali-catalysed transesterification, oil conversion to methyl ester can be enhanced from approx. 42–75% by increasing the reaction time, the reaction temperature, and the Methanol-CaO/FFA ratio. However, a complete oil conversion can only achieve by utilizing a two-steps transesterification process. The results showed that 4.4 L of biodiesel was produced from 1 kg of spent coffee ground. As such, this study expected this study to lead to the paradigm shift in spent coffee ground management with the ultimate target of zero-solid discharge highlights. © IEOM Society International.

Affiliations

Department of Chemistry Education, Faculty of Mathematics and Sciences, Universitas Negeri Jakarta, Jakarta Timur, Daerah Khusus, 13220, Indonesia; Department of Public Administration, Faculty of Social Science and Political Science, Universitas Diponegoro, Tembalang, Semarang, 50275, Indonesia; Faculty of Business, Economics and Social Development, Universiti Malaysia Terengganu, Kuala Nerus, 21030, Malaysia; Faculty of Fisheries and Food Science, Universiti Malaysia Terengganu, Kuala Nerus, 21030, Malaysia

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