Update Artikelilmiah: 37274

ADHELIA FEBRIANTI

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Abstrak (Bhs. Indonesia)

Kebutuhan energi di Indonesia selalu meningkat setiap tahunnya, akibat dari pertambahan jumlah penduduk sebanyak 32,56 juta jiwa dari 10 tahun terakhir. Tetapi pemanfaatan energi terbarukan belum maksimal karena energi konvensional masih menjadi konsumsi energi utama. Maka dari itu pemanfaatan energi terbarukan harus selalu dioptimalkan, seperti pembuatan bioetanol dengan memanfaatkan jambu air afkir.
Penelitian ini dilaksanakan di Laboratorium Teknik Sistem Termal Energi Terbarukan dan Laboratorium Pangan dan Gizi Universitas Jenderal Soedirman. Penelitian ini dilaksanakan pada bulan Februari 2022 sampai dengan bulan Maret 2022. Penelitian ini bertujuan untuk mengetahui karakteristik bioetanol dari jambu air afkir dan mengetahui pengaruh perbedaan massa Saccharomyces cerevisiae dan lama fermentasi terhadap kualitas bioetanol yang dihasilkan. Variabel yang diamati kadar gula reduksi, kadar bioetanol, dan rendemen bioetanol. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL), dengan analisis data menggunakan Analysis Of Variance (ANOVA) atau uji F, apabila perlakukan       berpengaruh nyata terhadap parameter maka dilanjutkan dengan Uji Duncan Multiple Test (DMRT). Pada penelitian ini terdapat dua faktor yaitu massa Saccharomyces cerevisiae 0%, 3,5%, 7%, 10,5% dan lama fermentasi 3 hari, 6 hari, 9 hari. Masing-masing perlakuan diulang sebanyak 3 kali sehingga terdapat 36 unit percobaan. 
Hasil penelitian menunjukkan bahwa jambu air afkir memiliki rata-rata kadar gula 0,158% m/v. Lama waktu fermentasi berpengaruh nyata terhadap kadar bioetanol dimana kadar bioetanol tertinggi didapatkan pada perlakuan waktu fermentasi 3 hari yaitu 4,359% m/v dengan penambahan Saccharomyces cerevisiae 3,5%. Selain itu pada perlakuan lama fermentasi terdapat pengaruh terhadap rendemen etanol, dimana hasil rendemen tertinggi yaitu sebesar 0,273%  v/v pada perlakukan waktu fermentasi 3 hari. Sedangkan konsentrasi mikroba serta interaksi keduanya tidak berpengaruh nyata terhadap rendemen etanol.

Abtrak (Bhs. Inggris)

Energy needs in Indonesia always increase every year, as a result of the first population increase of 32.56 million people from the last 10 years. However, the utilization of renewable energy has not been maximized because conventional energy is still the main energy consumption. Therefore, the use of renewable energy must always be optimized, such as the manufacture of bioethanol by utilizing rejected guava.
This research was conducted at the Renewable Energy Thermal System Engineering Laboratory and the Food and Nutrition Laboratory of Jenderal Soedirman University. This research was conducted from February 2022 to March 2022. This study aims to determine the characteristics of bioethanol from rejected guava and to determine the effect of differences in the mass of Saccharomyces cerevisiae and fermentation time on the quality of bioethanol produced. The variables observed were reducing sugar content, bioethanol content, and bioethanol yield. This study used a completely randomized design (CRD), with data analysis using Analysis of Variance (ANOVA) or F test, if the treatment had a significant effect on the parameters, it was followed by Duncan's Multiple Test (DMRT). In this study, there were two factors, namely the mass of Saccharomyces cerevisiae 0%, 3,5%, 7%, 10,5%and fermentation time of 3 days, 6 days, 9 days. Each treatment was repeated 3 times so that there were 36 experimental units.
The results showed that rejected guava water had an average sugar content of 0.158% m/v. The length of time of fermentation significantly affected the levels of bioethanol where the highest bioethanol content was found in the 3-day fermentation treatment, namely 4,359% m/v with the addition of 3,5% of Saccharomyces cerevisiae. In addition, the fermentation time treatment affected the ethanol yield, where the highest yield was 0.273% v/v at the 3-day fermentation time treatment. While the concentration of microbes and their interactions did not significantly affect the yield of ethanol.

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