Article Per Year (5 Year)
p-Index From 2020 - 2025
0.23
P-Index
This Author published in this journals
All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains RACIC : Rab Construction Research
Santoso Nugroho
Unknown Affiliation
Civil Engineering, Building, Construction & Architecture Engineering

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Produksi Bioetanol Dari Pati Sorgum Dengan Variasi Penambahan Tween 80 Dan Waktu Fermentasi Santoso Nugroho; Elvi Yenie; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Energy consumption is increasing steadily with the population growth and industrial development. Therefore, a substitute should be found. Bioethanol has been pointed out as asolution for variety complex problems related to energy and environmental issues. Sorghum [Sorghum bicolor (L) Moench] is considered to be a viable and renewable feedstock forbioethanol production because it high starch contains. The use of tween 80 as a growth supplement can help alter the substrate structure and make it more accessible to enzim, thuscan improve bioethanol yields. Simultaneous saccharification and fermentation was used to produce bioethanol from sorghum starch using commercial alpha amylase andglucoamylase. The fermentation were done in a 2 L bioreactor in batch mode (T = 20-300C; pH = 4,5). The variabel studied were fermentation time (24, 48, 72 and 96 h) and tween 80(7,5 and 10 ml/l). Bioethanol concentration were analyzed using Gas Ghromatography. The optimum amount of tween 80 to be added was 10 ml/l, which result the highest bioethanolyield 8,74 g/l in 96 h of fermentation.Keywords : bioethanol, tween 80, sorghum starch, simultaneous saccharification and fermentation.
PENGARUH PENGGUNAAN ABU SERABUT KELAPA (ASK) SEBAGAI BAHAN TAMBAH TERHADAP KUAT TEKAN BETON ALIR Santoso Nugroho; Nurul Rochmah
Racic : Rab Construction Research Vol 9 No 1 (2024): JUNI
Publisher : LPPM Universitas Abdurrab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36341/racic.v9i1.4210

Abstract

Development in Indonesia continues to increase every year, this is due to the increasing population in this country. This construction requires important construction materials, such as concrete. Flowing concrete is a type of concrete that has a slump flow value of more than 19 cm, but still maintains the natural strength of the concrete according to ASTM C 1017 standards. Flowing concrete is usually used for placing thin sections or in areas of solid reinforcing steel to reduce handling costs, explained by (Dawood and Ramli 2010). To produce flowable concrete, it is necessary to use a superplasticizer so that the cement particles can be suspended evenly and separated into fine particles in the concrete mixture. Based on the research results, it shows that the addition of coconut fiber ash with percentages of 0%, 2.5%, 5%, 7.5% and 10% with superplasticizer of 1.5% of the cement weight to determine the compressive strength of the concrete. The coconut fiber ash test object used acts as an additive in the optimum concrete mixture. The sample used was a 15 x 30 cm cylinder for testing the compressive strength of coconut fiber ash at the age of 7 days, 14 days and 28 days. The test results showed that with the addition of coconut fiber ash, the compressive strength of the concrete experienced fluctuations up and down at mixed percentages of 2.5% and 5%, while at percentages of 7.5% and 10% it tended to decrease compared to normal concrete.
Co-Authors Elvi Yenie, Elvi Nurul Rochmah Sri Rezeki Muria