Bioethanol, internal combustion engines and the development of zero-waste biorefineries: an approach towards sustainable motor spirit

Barua, Shaswat; Sahu, Debojeet; Sultana, Firdous; Baruah, Swagata; Mahapatra, Sadhan

doi:10.1039/d3su00080j

RSC Sustain.

2023

DOI: 10.1039/d3su00080j

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Bioethanol, internal combustion engines and the development of zero-waste biorefineries: an approach towards sustainable motor spirit

Shaswat Barua,

Debojeet Sahu,

Firdous Sultana

et al.

Abstract: Nature is a huge reservoir of energy that helps in the proliferation of life on earth. However, the human race has lately understood the importance of conservation of the energy...

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2024

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Cited by 6 publications

References 156 publications

(188 reference statements)

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Optimization of bioethanol production from sugar beet processing by-product molasses using response surface methodology

Altınışık,

Nigiz,

Gürdal

et al. 2024

Biomass Conv. Bioref.

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Bioethanol production from renewable biomass sources has garnered significant interest due to its potential as a sustainable alternative to fossil fuels. In this study, we investigated the optimization of bioethanol production from molasses, a by-product of the sugar production process using Saccharomyces cerevisiae through Response Surface Methodology (RSM). Initially, the fermentation process was optimized using RSM, considering four independent variables: substrate concentration, pH, temperature, and fermentation time. Subsequently, the effects of these variables on bioethanol yield were evaluated, and a quadratic model was developed to predict the optimum conditions. Analysis of variance (ANOVA) indicated a high coefficient of determination (R2) for the model, suggesting its adequacy for prediction. The optimized conditions for bioethanol production were determined as follows: substrate concentration of 200 g L−1, pH of 5.0, temperature of 30 °C and fermentation time of 72 h. Under these conditions, the predicted bioethanol yield was 84%. Overall, this study demonstrates the successful application of RSM for optimizing bioethanol production from molasses using S. cerevisiae, highlighting its potential as a promising feedstock for biofuel production.

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Optimization of bioethanol production from sugar beet processing by-product molasses using response surface methodology

Altınışık,

Nigiz,

Gürdal

et al. 2024

Biomass Conv. Bioref.

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Availability and saccharification of starchy biowastes for bioethanol production in the Kingdom of Saudi Arabia

Al-Malki,

Alamri,

Hashem

2024

J.Umm Al-Qura Univ. Appll. Sci.

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Bioenergy has received a great interest because of increase in oil price, rapid depletion of fossil fuels, global climate change, and environmental pollution. However, cheap, and fermentable sugar-rich substrates represent a challenge that face production of biofuel on commercial scale. Therefore, this study offers a reliable solution for sustainability of biofuel production by recycling cheap resource (starchy biowaste) that is abundant in Kingdom of Saudi Arabia (KSA). To achieve the goal of this study, we applied different hydrolysis protocols to obtain a high quantity of fermentable sugars from starchy biowaste collected from restaurants as meal leftover. The results approved that starchy biowastes are abundant in the KSA; with the size of the residue per meal ranging from 149 to 5218 g, and starchy materials, mostly waste rice (WR), representing 72.5%. The saccharification of thermochemically pre-treated WR, carried out using an α-amylase and glucoamylase mixture for 4 h, was the most effective technique amongst all the pre-treatment methods, and produced the highest glucose concentration, i.e. 430.6 g/kg WR. Among five yeast isolates that were tested for their ability to produce ethanol from pre-treated WR via fermentation, Kluyveromyces marxianus KKU-RDI-11 and Pichia kudriavzevii KKU-RDI-18 produced the highest bioethanol concentrations, i.e. 15.44 g/L and 15.62 g/L, respectively. This study recommends application of our technique and the fermentative yeasts on the industrial and commercial scale in KSA, for production of biofuel and recycling of starchy waste materials from restaurants.

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Recent developments in (bio)ethanol conversion to fuels and chemicals over heterogeneous catalysts

Thangaraj,

Monama,

Mohiuddin

et al. 2024

Bioresource Technology

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Bioethanol, internal combustion engines and the development of zero-waste biorefineries: an approach towards sustainable motor spirit

Abstract: Nature is a huge reservoir of energy that helps in the proliferation of life on earth. However, the human race has lately understood the importance of conservation of the energy...

Cited by 6 publications

References 156 publications

Optimization of bioethanol production from sugar beet processing by-product molasses using response surface methodology

Optimization of bioethanol production from sugar beet processing by-product molasses using response surface methodology

Availability and saccharification of starchy biowastes for bioethanol production in the Kingdom of Saudi Arabia

Recent developments in (bio)ethanol conversion to fuels and chemicals over heterogeneous catalysts

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