ASEAN Journal of Chemical Engineering
Vol 22, No 1 (2022)

Immobilization of Saccharomyces cerevisiae in Jackfruit (Artocarpus heterophyllus) Seed Fiber for Bioethanol Production

Zuhriyan Ash Shiddieqy Bahlawan (Department of Chemical Engineering, Faculty of Engineering, Universitas Negeri Semarang, Indonesia)
Megawati Megawati (Department of Chemical Engineering, Faculty of Engineering, Universitas Negeri Semarang, Indonesia)
Astrilia Damayanti (Department of Chemical Engineering, Faculty of Engineering, Universitas Negeri Semarang, Indonesia)
Radenrara Dewi Artanti Putri (Department of Chemical Engineering, Faculty of Engineering, Universitas Negeri Semarang, Indonesia)
Ayu Nur Permadhini (Department of Chemical Engineering, Faculty of Engineering, Universitas Negeri Semarang, Indonesia)
Khoridatus Sulwa (Department of Chemical Engineering, Faculty of Engineering, Universitas Negeri Semarang, Indonesia)
Fahreza Pracenda Felicitia (Department of Chemical Engineering, Faculty of Engineering, Universitas Negeri Semarang, Indonesia)
Anggun Septiamurti (Department of Chemical Engineering, Faculty of Engineering, Universitas Negeri Semarang, Indonesia)



Article Info

Publish Date
30 Jun 2022

Abstract

Bioethanol is alternative renewable energy typically obtained from glucose through a fermentation process using Saccharomyces cerevisiae. In the bioethanol fermentation process using yeast, there are several inhibiting factors, such as a high concentration of substrate, ethanol as the product, and nutrients. The present study aimed to investigate the effect of fermentation time (12- 72 hours), immobilized carrier size (sizes of 0.5 cm3 , 1 cm3 , and 1.5 cm3 ), and medium pH (3.0, 4.0, and 5.0) on the ethanol fermentation process using immobilized yeast in jackfruit (Artocarpus heterophyllus) seeds and subsequently to compare its performance with a free cell system. The highest ethanol concentration (89.15 g/L) with a yield of 96.92% was obtained by immobilizing yeast in jackfruit seed at a fermentation time of 72 hours, carrier size of 0.5 cm3 , and medium pH of 5.0. When compared to the free cell system fermentation under identical operating conditions, immobilized yeast in jackfruit seed obtained 1.41 times higher ethanol concentration. Jackfruit seed also led to a higher ethanol concentration compared to other S. cerevisiae carriers. Altogether, our findings imply that jackfruit seed has great potential as a carrier of S. cerevisiae in the process of fermenting glucose into ethanol

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Journal Info

Abbrev

AJChE

Publisher

Subject

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry

Description

The ASEAN Journal of Chemical Engineering publishes papers on Chemical Engineering, specifically but not limited to the areas of thermodynamics, reaction kinetics, transport phenomena, process control, environment, energy, biotechnology, corrosion, separation science, powder technology, materials ...