Proceedings of the 4th International Seminar on Science and Technology (ISST 2022)

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Improving the Value of Spent Coffee Ground by Converting Carbohydrates into Sugars by Saccharomyces cerevisiae to Produce Bioethanol

Authors
Syahruddin Syahruddin1, *, Hayyun Lisdiana2, Erdawati Erdawati2
1Department of Mechanical Engineering, Balikpapan State Polytechnic, Balikpapan, 76129, Indonesia
2Department of Chemistry, State University of Jakarta, Jakarta, 13220, Indonesia
*Corresponding author. Email: syahruddin@poltekba.ac.id
Corresponding Author
Syahruddin Syahruddin
Available Online 22 August 2023.
DOI
10.2991/978-94-6463-228-6_23How to use a DOI?
Keywords
Spent Coffee Ground; Hydrolysis; Fermentation; Bioethanol
Abstract

Spent coffee grounds contained 45% carbohydrate, 26% lignin, 13% lipid, and 13% protein. To improve the value of spent coffee grounds in a sustainable way, a study was done on how to convert carbohydrates into fermentable sugars which could be used to make value-added products. To accomplish this, a pre-treatment process, followed by acid-promoted hydrolysis, fermentation using Saccharomyces cerevisiae, and a distillation process, were performed to obtain bioethanol. The purpose was to find out the effect of various sulphuric acid concentrations and periods of fermentation on bioethanol yield. Analysis of the bioethanol content was performed using Chromatography gas. The result showed that a slight increase in sulphuric acid concentration, triggered higher glucose production, reaching optimum level at 0.1 M, then lowered gradually. Furthermore, as fermentation time increased, bioethanol yield from glucose conversion also increased, reaching a peak at day 4, then decreasing gradually on subsequent days. This study revealed that 10 g of spent coffee ground, subjected to hydrolysis using 200 ml of 0.1 M sulphuric acid, run at 55 ℃ for 60 min, and fermentation over 4 days period, produced 40% bioethanol.

Copyright
© 2023 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the 4th International Seminar on Science and Technology (ISST 2022)
Series
Advances in Physics Research
Publication Date
22 August 2023
ISBN
978-94-6463-228-6
ISSN
2352-541X
DOI
10.2991/978-94-6463-228-6_23How to use a DOI?
Copyright
© 2023 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Syahruddin Syahruddin
AU  - Hayyun Lisdiana
AU  - Erdawati Erdawati
PY  - 2023
DA  - 2023/08/22
TI  - Improving the Value of Spent Coffee Ground by Converting Carbohydrates into Sugars by Saccharomyces cerevisiae to Produce Bioethanol
BT  - Proceedings of the 4th International Seminar on Science and Technology (ISST 2022)
PB  - Atlantis Press
SP  - 208
EP  - 214
SN  - 2352-541X
UR  - https://doi.org/10.2991/978-94-6463-228-6_23
DO  - 10.2991/978-94-6463-228-6_23
ID  - Syahruddin2023
ER  -