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Journal : Serambi Engineering

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Pemanfaatan Abu Tongkol Jagung dan Abu Tempurung Kelapa dalam Pembuatan Pupuk Kalium Silika dengan Metode Sol-Gel Panggih Syambudi; Anerasari Meidinariasty; Yulianto Wasiran
Jurnal Serambi Engineering Vol. 9 No. 4 (2024): Oktober 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

South Sumatra is a province with high agricultural productivity. One of the largest agricultural products is corn and coconut, which is quoted from the website of the Lampung Province Food Security, Food Crops and Horticulture Office in 2021, which states that South Sumatra Province is one of the 10 largest corn producing provinces in Indonesia. With this in mind, the researcher conducted a study using the silica content of corn cobs and coconut husk waste as raw material for the production of potassium silica fertilizer using the sol-gel method. The potassium silicate fertiliser was produced by reacting KOH with corncob ash and coconut husk ash, which were varied. This is because the independent variables used are the concentration of KOH (4M, 6M) and the composition ratio of corn cob ash and coconut shell ash (10:40, 20:30, 25:25, 30:20, 40:10). The final result gave the best sample with more coconut shell ash composition than corn cob ash and higher KOH concentration. The sample formed 12.7 grams of final product with potassium content of 8821 mg/L and water content of less than 1%. As for the silica content in 4:1 coconut shell ash, there is approximately 73.2% silica.
Pengaruh Waktu dan Konsentrasi Enzim A-Amylase dan Glukoamilase pada Hidrolisis Biji Cempedak sebagai Bahan Baku Bioetanol RA Ghina Sayyidah Achva; Jaksen M. Amin; Anerasari Meidinariasty
Jurnal Serambi Engineering Vol. 9 No. 4 (2024): Oktober 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Bioethanol is a renewable energy source with great potential for development in Indonesia. Bioethanol is produced from the fermentation of sugar, starch or lignocellulosic biomass. In addition, cempedak seeds also contain sugars such as glucose, fructose and sucrose, which provide fast energy. The aim of this study is to identify the optimal composition by varying the hydrolysis time and adding alpha-amylase and glucoamylase enzymes. In the pre-treatment process, Cempedak seeds are processed and then the hydrolysis process is continued with variations in the addition of α-amylase and glucoamylase enzymes. (0.5%:1.5%:2.5%) (v/v) and then analysed for sugar content. From the results of the analysis, the highest % Brix was 16% at a hydrolysis time of 70 minutes with an enzyme concentration of 2.5%. The lowest water content of 98.93% was obtained at a hydrolysis time of 70 minutes and an enzyme concentration of 2.5%. In addition, the best sugar content results were used as raw material for bioethanol production and the ethanol content was checked. The fermentation process was carried out for 6 days and the ethanol content obtained was 64.95%, based on analysis by GC-MS.
Pemanfaatan Limbah Kulit Nanas Menjadi Bioetanol dengan Variasi Konsentrasi Ragi dan Lama Fermentasi Febri Liani Br Simanjuntak; Muhammad Yerizam; Anerasari Meidinariasty
Jurnal Serambi Engineering Vol. 9 No. 4 (2024): Oktober 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Pineapple peel waste can pollute the environment if not properly managed. On the other hand, pineapple peel waste can be used as a raw material for the production of bioethanol. The aim of this study was to evaluate the effect of variations in yeast concentration and the duration of the fermentation process on the bioethanol content of pineapple peel waste. In the fermentation process with variations in yeast concentration of 1.5%, 2% and 4%, the type of yeast used is Saccharomyces cerevisiae, the addition of nutrients in the form of NPK and urea by 0.5% each, as well as variations in the length of fermentation for 4 days, 5 days, 6 days, 7 days and 8 days. This study showed that the bioethanol content obtained was significantly influenced by yeast concentration and fermentation time. The sample with the highest ethanol content was produced with the addition of 4% yeast and fermentation for 5 days, the bioethanol content produced was 59% based on calculations using the standard ethanol curve equation and 57.23% based on analysis using GC-MS.
Co-Authors Fadarina Febri Liani Br Simanjuntak Jaksen M. Amin Muhammad Hadiid Fadhlillah Muhammad Yerizam Panggih Syambudi RA Ghina Sayyidah Achva Robert Junaidi Ryu Indah Pratiwi Tiara Manda Putri Wasiran, Yulianto