Production of bioethanol from rice husk pretreated with alkalis and hydrolyzed with acid cellulase at pilot scale

Cacua, A.; Gelvez, J. J.; Rodríguez, D. C.; Parra, J. W.

doi:10.1088/1742-6596/1126/1/012034

Cited by 10 publications

(5 citation statements)

References 8 publications

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“…Pure and mixed rice husk samples that were pre-treated with acid yielded 14.8% and 15.0%, respectively. This result was in good agreement with earlier studies by Cacua et al (2018), which yielded 15.7% alcohol. However, pre-treatment with alkali, the pure and mixed rice husk samples yielded 6.10% and 4.80% respectively.…”

Section: Percentage Yieldsupporting

confidence: 93%

“…Dagnino et al (2013) optimized acid-pretreated milled rice hulls for bioethanol production using 0.3% w/v H2SO4 and produced 0.11 g ethanol/g of rice hulls, accounting for 84 % conversion efficiency. Cacua et al (2018) pretreated rice husk with a 2.0% w/v NaOH solution and subsequently hydrolyzed it with acid cellulase (CFB3S). The alcoholic fermentation of total reducing sugars (TRS) obtained in the enzymatic hydrolysis was carried out with Saccharomyces cerevisiae, giving 4.70 g bioethanol/100 g of rice husk and a yield of 15.67 %.…”

Section: Introductionmentioning

confidence: 99%

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Conversion of waste products derived from rice processing industry into bioethanol

Kukwa

Nande

et al. 2023

BioRes

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The effects of acid and alkali hydrolysis, as well as rice husk varieties (pure and mixed), on bioethanol production using saccharification and fermentation, were investigated in this study. Microbes such as Saccharomyces cerevisiae are currently used for fermenting agricultural wastes to bioethanol, an environmentally friendly alternative to petroleum energy sources. Rice husks were ground to a fine powder, then hydrolyzed with acid and alkali, and incubated for five days. A refractometer was used to perform a sugar reduction test, which determined the presence of fermentable sugar in the media. The parameters revealed that the variety of rice husk used did not affect the ethanol percent yield, which was 14.8 ± 0.5% and 15.0 ± 0.5% for the pure and mixed varieties, respectively; however, there was a substantial difference in the percentage yield in the method of pre-treatment. The percentage yield of ethanol in the acid pre-treated sample was higher (14.8 ± 0.5% and 15.0 ± 0.5%) than that of the alkali (6.1 ± 0.5% and 4.8 ± 0.5%). The presence of alcohol in the sample was confirmed by FTIR analysis, while GC-MS identified the specific compounds and their percentage composition – ethanol (9.67%). This suggests that using H2SO4 in the hydrolysis of rice husk is a promising and effective method for producing bioethanol.

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Section: Percentage Yieldsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Conversion of waste products derived from rice processing industry into bioethanol

Kukwa

Nande

et al. 2023

BioRes

View full text Add to dashboard Cite

show abstract

“…Rice husk is the main biomass by-product of rice harvesting, amounting to almost 20% of the total cereal production in the rice industry (Cacua et al, 2018). It has a low density at around 122 kg/m 3 .…”

Section: H Rice Husksmentioning

confidence: 99%