Efficient conversion of cornstalk to bioethanol using dilute H2SO4 pretreatment

Jehadin, Farjana; Rabeya, T; Asad, Mohammad; Ayodele, Olubunmi O.; Adekunle, Abiodun E.; Islam, Shofiq

doi:10.1007/s40095-020-00366-w

Cited by 4 publications

(3 citation statements)

References 40 publications

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“…Stalk is a lignocellulosic material comprising prevalently of lignin, hemi-cellulose, and cellulose. The substantial amount of cellulose and hemi-cellulose contribute in production of bioethanol from corn stalk as they are easily convertible into fermentable sugars [ [10] , [11] , [12] , [13] ]. In most corn producing countries stalk has been used as a nutritive product for some animals, but due to its increased fibre and low protein content it is not feasibly digestible; however, certain physical, biological, and chemical treatments of corn stalk improve its feeding value [ [14] , [15] , [16] ].…”

Section: Introductionmentioning

confidence: 99%

Effect of lignocellulosic corn stalk on mechanical, physical, and thermal properties of injection moulded low density polyethylene composites: An approach towards a circular economy

Khan,

Mishra,

Patidar

et al. 2024

Heliyon

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Section: Introductionmentioning

confidence: 99%

Effect of lignocellulosic corn stalk on mechanical, physical, and thermal properties of injection moulded low density polyethylene composites: An approach towards a circular economy

Khan,

Mishra,

Patidar

et al. 2024

Heliyon

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“…Lignocellulosic biomass is produced by plant photosynthesis from solar energy and is the most abundant renewable feedstock in the world. The bio-conversion of lignocellulosic biomass into ethanol is viewed as one of the most promising ways to partially replace traditional fossil fuels, since the combustion of ethanol produces less particulate matter, carbon monoxide, and hydrocarbons than fossil fuels [ 1 ]. In addition, as bioethanol has a high octane number, mixing bioethanol with gasoline could improve the anti-detonating quality of transportation fuel.…”

Section: Introductionmentioning

confidence: 99%

Cellulosic ethanol production by consortia of Scheffersomyces stipitis and engineered Zymomonas mobilis

Sun

Zhang

et al. 2021

Biotechnol Biofuels

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Background As one of the clean and sustainable energies, lignocellulosic ethanol has achieved much attention around the world. The production of lignocellulosic ethanol does not compete with people for food, while the consumption of ethanol could contribute to the carbon dioxide emission reduction. However, the simultaneous transformation of glucose and xylose to ethanol is one of the key technologies for attaining cost-efficient lignocellulosic ethanol production at an industrial scale. Genetic modification of strains and constructing consortia were two approaches to resolve this issue. Compared with strain improvement, the synergistic interaction of consortia in metabolic pathways should be more useful than using each one separately. Results In this study, the consortia consisting of suspended Scheffersomyces stipitis CICC1960 and Zymomonas mobilis 8b were cultivated to successfully depress carbon catabolite repression (CCR) in artificially simulated 80G40XRM. With this strategy, a 5.52% more xylose consumption and a 6.52% higher ethanol titer were achieved by the consortium, in which the inoculation ratio between S. stipitis and Z. mobilis was 1:3, compared with the Z. mobilis 8b mono-fermentation. Subsequently, one copy of the xylose metabolic genes was inserted into the Z. mobilis 8b genome to construct Z. mobilis FR2, leading to the xylose final-consumption amount and ethanol titer improvement by 15.36% and 6.81%, respectively. Finally, various corn stover hydrolysates with different sugar concentrations (glucose and xylose 60, 90, 120 g/L), were used to evaluate the fermentation performance of the consortium consisting of S. stipitis CICC1960 and Z. mobilis FR2. Fermentation results showed that a 1.56–4.59% higher ethanol titer was achieved by the consortium compared with the Z. mobilis FR2 mono-fermentation, and a 46.12–102.14% higher ethanol titer was observed in the consortium fermentation when compared with the S. stipitis CICC1960 mono-fermentation. Furthermore, qRT-PCR analysis of xylose/glucose transporter and other genes responsible for CCR explained the reason why the initial ratio inoculation of 1:3 in artificially simulated 80G40XRM had the best fermentation performance in the consortium. Conclusions The fermentation strategy used in this study, i.e., using a genetically modified consortium, had a superior performance in ethanol production, as compared with the S. stipitis CICC1960 mono-fermentation and the Z. mobilis FR2 mono-fermentation alone. This result showed that this strategy has potential for future lignocellulosic ethanol production.

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“…It was found that the hard reticular structure of corn straw lignin is the main issue that hinders the conversion of straw into biofuels [22]. Steam-assisted alkaline pretreatment and dilute acid, along with intensified thermal pretreatment, can improve the ethanol yield of corn stalk [23][24][25]. Under high temperature conditions, the extraction efficiency of ethanol fermentation from corn straw is the highest when an inoculum size of 5% has been used [20,26,27].…”

Section: Introductionmentioning

confidence: 99%

Driving Mechanism of Farmers’ Utilization Behaviors of Straw Resources—An Empirical Study in Jilin Province, the Main Grain Producing Region in the Northeast Part of China

Guo

Wang

et al. 2021

Sustainability

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In recent years, the unsustainable behaviors of straw utilization have led to waste straw being one of the sources of agricultural non-point source pollution. Studying the resource utilization of crop straw is conducive to expediate the development of ecological and green agriculture. More importantly, it has long-term significance for the recycling of agricultural waste, improving the quality of rural life, and the employment of farmers. Based on the theory of planned behavior (TPB), taking the representative survey questionnaire of farmers in Jilin Province, China as the sample, the structural equation model (SEM) was constructed to study the main factors that drive the utilization behaviors of straw resources of farmers and to explore the driving mechanism of the farmers behaviors in Jilin Province. The results show that the behavioral attitude and subjective norms of farmers in Jilin Province not only indirectly affect their actual behaviors through behavioral willingness, but also has significant direct effects on their behaviors. The most critical factors that affect the willingness of farmers to utilize the straw resources in Jilin Province are subjective norms and moral responsibilities. The subjective norms of farmers have a direct and significant positive impact on their willingness and behaviors. Behavioral attitude and perceived behavior control have a significant positive impact on their willingness. The behavioral willingness has a significant positive impact on their actual behaviors. This study provides guidance for the utilization of straw resources policy implications.

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Efficient conversion of cornstalk to bioethanol using dilute H2SO4 pretreatment

Cited by 4 publications

References 40 publications

Effect of lignocellulosic corn stalk on mechanical, physical, and thermal properties of injection moulded low density polyethylene composites: An approach towards a circular economy

Effect of lignocellulosic corn stalk on mechanical, physical, and thermal properties of injection moulded low density polyethylene composites: An approach towards a circular economy

Cellulosic ethanol production by consortia of Scheffersomyces stipitis and engineered Zymomonas mobilis

Driving Mechanism of Farmers’ Utilization Behaviors of Straw Resources—An Empirical Study in Jilin Province, the Main Grain Producing Region in the Northeast Part of China

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