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Utilization of Iles-Iles and Sorghum Starch for Bioethanol Production

International Journal of Renewable Energy Development : JRED · Vol. 3 No. 2 (2014) · hlm. 83–89

DOI
10.14710/ijred.3.2.83-89
ISSN
2252-4940
Terbit
2014-07-15
Penerbit
Center of Biomass & Renewable Energy (CBIORE)
Bahasa
eng

Abstrak

The aims of this study were to convert the starches from iles-iles tubers (Amorphophalus campanulatus) and sorghum grains (Sorghum bicolor L) into bioethanol as an alternative energy. Both of these agricultural products contains a high content starches and they do not use as the major foods in Indonesia. To find out the maximum ethanol concentration and yield, both the raw materials were converted to ethanol on various process variables including the concentration of flour substrate solution (100-300 g/L), β-amylase enzyme concentration (0.8 - 6.4 ml/kg of flour ), the concentration of dry yeast S. cerevisiae (2-15 g), and fermentation time (72-168 hours). The results showed that at the flour substrate concentration of 250 g/L produced the maximum ethanol contents of 100.29 g/L and 95.11 g/L for iles-iles and sorghum, respectively. Effect of β-amylase enzyme in the saccharification process showed that at concentration of 3.2 ml/kg the maximum reducing sugar content of 204.94 g/L and 193.15 g/L for iles-iles and sorghum substrate, respectively were generated therefore it was corresponding to the maximum ethanol production. The concentration effect of dry yeast S. cerevisiae in the fermentation stage for the iles-iles and sorghum substrate revealed that the maximum ethanol obtained at 5 g yeast activated in 100 ml medium starter resulted the highest ethanol content 100.29 g/L 95.11 g/L for iles-iles and sorghum substrate, respectively. To determine the effect of fermentation time on ethanol yield from iles-iles and sorghum substrate, the fermentation process were performed at 3, 5, and 7 days. The maximum ethanol fermentation was obtained at 5 days fermentation. The ethanol yield is calculated by weight of ethanol is formed (g) divided by the weight of flour (g). Based on the experiment results, conducted, generally the highest ethanol yield of iles-iles was higher than that of sorghum flour. The highest yield (g/g) iles-iles and sorghum flour were 71.25 and 68.92 respectively

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  • Muhammadiyah University of Surakarta
  • Diponegoro University
  • University of Technology Malaysia
  • Universitas Gadjah Mada
  • Institut Teknologi Sepuluh Nopember
  • Institut Teknologi Indonesia
  • Universitas Dian Nuswantoro
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Rekan penulisOrganisasiArtikel bersama
Hadiyanto HadiyantoDiponegoro University4
Widayat WidayatDiponegoro University2
Nur HidayatiMuhammadiyah University of Surakarta1
Diah AyuMuhammadiyah University of Surakarta1
Rizca AulyanaMuhammadiyah University of Surakarta1
Esti Widya AstutiMuhammadiyah University of Surakarta1
Agung SugihartoMuhammadiyah University of Surakarta1
N.A.S. AminUniversity of Technology Malaysia1
W. A. SiswantoMuhammadiyah University of Surakarta1
Sakina Tunissa AnarkiMuhammadiyah University of Surakarta1
Sabda Wahyu NugrohoMuhammadiyah University of Surakarta1
Reistu WidiastutikMuhammadiyah University of Surakarta1
Apsari Puspita AiniDiponegoro University1
Arief Taufik BudimanUniversitas Gadjah Mada1
Achmad RoesyadiInstitut Teknologi Sepuluh Nopember1
Wahyu FitrianiDiponegoro University1
Luqman BuchoriDiponegoro University1
Norzita NgadiUniversity of Technology Malaysia1
Nadia Taradissa MaheswariDiponegoro University1
Hantoro SatriadiDiponegoro University1
Indah KusumadewiMuhammadiyah University of Surakarta1
Marcelinus ChristwardanaInstitut Teknologi Indonesia1
Figa Muhammad OctafalahandaDiponegoro University1
Jihan NabilaDiponegoro University1
Andono Kusuma JatiDiponegoro University1
Adian KhoironiUniversitas Dian Nuswantoro1

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Sumber metadata: OAI-PMH (metadata jurnal) https://ijred.cbiore.id/index.php/ijred/oai, pertama di-harvest 8 Nov 2026, terakhir terlihat 8 Nov 2026.
Metadata asli (oai_dc) 
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	<dc:title xml:lang="en-US">Utilization of Iles-Iles and Sorghum Starch for Bioethanol Production</dc:title>
	<dc:creator>Kusmiyati, Kusmiyati</dc:creator>
	<dc:creator>Sulistiyono, Agus</dc:creator>
	<dc:subject xml:lang="en-US">bioenergy;  bioethanol; iles-iles; sorghum; S. cerevisiae</dc:subject>
	<dc:description xml:lang="en-US">The aims of this study were to convert the starches from iles-iles tubers (Amorphophalus campanulatus) and sorghum grains (Sorghum bicolor L) into bioethanol as an alternative energy. Both of these agricultural products contains a high content starches and they do not use as the major foods in Indonesia. To find out the maximum ethanol concentration and yield, both the raw materials were converted to ethanol on various process variables including the concentration of flour substrate solution (100-300 g/L), β-amylase enzyme concentration (0.8 - 6.4 ml/kg of flour ), the  concentration of dry yeast S. cerevisiae (2-15 g), and fermentation time (72-168 hours). The results showed that at the flour substrate concentration of 250 g/L produced the maximum ethanol contents of 100.29 g/L and 95.11 g/L   for iles-iles and sorghum, respectively. Effect of β-amylase enzyme in the saccharification process showed that at concentration  of 3.2 ml/kg  the maximum reducing sugar content of 204.94 g/L and 193.15 g/L  for iles-iles and sorghum substrate, respectively were generated therefore it was corresponding to the maximum ethanol production. The concentration effect of dry yeast S. cerevisiae in the fermentation stage for the iles-iles and sorghum substrate revealed that the maximum ethanol obtained at 5 g yeast activated in 100 ml medium starter resulted the highest ethanol content 100.29 g/L 95.11 g/L for iles-iles and sorghum substrate, respectively. To determine the effect of fermentation time on ethanol yield from iles-iles and sorghum substrate, the fermentation process were performed at 3, 5, and 7 days. The maximum ethanol fermentation was obtained at 5 days fermentation. The ethanol yield is calculated by weight of ethanol is formed (g) divided by the weight of flour (g). Based on the experiment results, conducted, generally the highest ethanol yield of iles-iles was higher than that of sorghum flour. The highest yield (g/g) iles-iles and sorghum flour were 71.25 and 68.92 respectively</dc:description>
	<dc:publisher xml:lang="en-US">Center of Biomass &amp; Renewable Energy (CBIORE)</dc:publisher>
	<dc:contributor xml:lang="en-US"></dc:contributor>
	<dc:date>2014-07-15</dc:date>
	<dc:type>info:eu-repo/semantics/article</dc:type>
	<dc:type>info:eu-repo/semantics/publishedVersion</dc:type>
	<dc:type xml:lang="en-US"></dc:type>
	<dc:format>application/pdf</dc:format>
	<dc:identifier>https://ijred.cbiore.id/index.php/ijred/article/view/6961</dc:identifier>
	<dc:identifier>10.14710/ijred.3.2.83-89</dc:identifier>
	<dc:source xml:lang="en-US">International Journal of Renewable Energy Development; Vol 3, No 2 (2014): July 2014; 83-89</dc:source>
	<dc:source>2252-4940</dc:source>
	<dc:language>eng</dc:language>
	<dc:relation>https://ijred.cbiore.id/index.php/ijred/article/view/6961/PDF</dc:relation>
</oai_dc:dc>