DETERMINATION OF FERMENTATION LENGTH AND INITIAL pH OF MEDIA IN PRODUCING ETHANOL BY BM1-CP14 PENENTUAN LAMA FERMENTASI DAN pH AWAL MEDIA DALAM PRODUKSI ETANOL OLEH BM1-CP14

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Ida Ayu Somya Iswari Pranidhani I Made Mahaputra Wijaya Ni Putu Suwariani

Abstract

This study aims to determine the optimum duration of fermentation and the best initial pH of the growth medium BM1-CP14 isolates in order to producing ethanol. In this study, 5 treatments of fermentation time (2, 4, 6, 8 and 10 days) combined with 3 initial pH treatments of the fermentation medium (4, 5, and 6) were conducted. This research was carried out in several step, namely cell rejuvenation, propagation of BM1-CP14 isolates, fermentation, distillation, and calculation of total ethanol. The best fermentation duration was found to be 10 days with difference of total dissolved solid 1.07 (?%brix) yielded total ethanol of 5.08 mL. In the initial pH treatment, the media produced total ethanol at pH 4 of 5.15 mL, pH 5 of 5.17 mL and pH 6 of 5.16 mL. The pH treatment of BM1-CP14 bacteria was found to have no effect due to the total ethanol produced was almost similar.

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PRANIDHANI, Ida Ayu Somya Iswari; WIJAYA, I Made Mahaputra; SUWARIANI, Ni Putu. DETERMINATION OF FERMENTATION LENGTH AND INITIAL pH OF MEDIA IN PRODUCING ETHANOL BY BM1-CP14. JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI, [S.l.], v. 10, n. 4, p. 513-521, dec. 2022. ISSN 2503-488X. Available at: <https://ojs.unud.ac.id/index.php/jtip/article/view/89533>. Date accessed: 25 apr. 2024. doi: https://doi.org/10.24843/JRMA.2022.v10.i04.p12.
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