Eksakta : Berkala Ilmiah Bidang MIPA
Vol. 21 No. 1 (2020): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)

Study the Effect of pH on the Fermentation Anaerobic-Aerobic Siwalan (Borassus flabellifer L.) Sap to Produce Acetic Acid

Elly Agustiani (Department of Industrial Chemical Engineering, Faculty of Vocational, Institut Teknologi Sepuluh Nopember (ITS), Sukolilo Surabaya, Indonesia)
Destri Susilaningrum (Department of Business Statistics, Faculty of Vocational, Institut Teknologi Sepuluh Nopember, Sukolilo Surabaya, Indonesia)
Atiqa Rahmawati (Department of Industrial Chemical Engineering, Faculty of Vocational, Institut Teknologi Sepuluh Nopember (ITS), Sukolilo Surabaya, Indonesia)
Fibrillian Z.L. (Department of Industrial Chemical Engineering, Faculty of Vocational, Institut Teknologi Sepuluh Nopember (ITS), Sukolilo Surabaya, Indonesia)
Dimas L.R. (Department of Industrial Chemical Engineering, Faculty of Vocational, Institut Teknologi Sepuluh Nopember (ITS), Sukolilo Surabaya, Indonesia)

Article Info

Publish Date
30 Apr 2020

Abstract

This research is to study the effect of ethanol fermentation aerobic pH on acetic acid product. Anaerobic fermentation uses saccharomyces cerevisiae to produce ethanol, and aerobic fermentation uses acetobacter acetic for acetic acid production. In aerobic ethanol fermentation using pH 3; 3.5; 4 and 5. The ethanol concentration was evaluated using GC ULTRA Scientific Gas Chromatography, DSQ II detector, and MS 220 column. Acetic acid produced was analyzed using an alkalymetric method. Anaerobic fermentation uses Saccharomyces cerevisiae with 1-day log phase, while aerobic fermentation uses acetobacter aceti with a 5-day log phase. Fermentation using saccharomyces cerevisiae within 24 hours so that reduction sugar could stably decrease, optimum ethanol could be got at optimum pH 6 which could decrease 55 % of reducing sugar concentration to produce 8,20583 %v/v ethanol. Fermentation acetate acid content observed in 3 days at pH 6 and 30 ⁰C will produce 6,659 g/l also shows that pH 4-6 at 30 ⁰C will produce 6,605 g/l acetate acid. Aerobic fermentation of acetate acid in 3 days shows that pH 4-6 is highly affected by temperature at 30⁰C. Statistical analysis shows, in ethanol production pH and fermentation time give significant effect, but interaction has no significant effect.

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Journal Info
Eksakta : Berkala Ilmiah Bidang MIPA
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Abbrev

eksakta

Publisher

Universitas Negeri Padang

Subject

Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Mechanical Engineering

Description

Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464) is an open access journal and peer-reviewed that publishes either original article or reviews. The journal is dedicated towards dissemination of knowledge related to the advancement in scientific research. The prestigious interdisciplinary ...