Synergistic effect of pretreatment and fermentation process on carbohydrate-rich Scenedesmus dimorphus for bioethanol production

Chng, Lee Muei; Lee, Keat Teong; Chan, Derek Juinn Chieh

doi:10.1016/j.enconman.2016.10.026

Cited by 68 publications

(20 citation statements)

References 32 publications

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“…Chng et al [19] reported that a low concentration of acid with high temperature is desirable than a high concentration acid because it will not cause the degradation of the fermentable sugars to other unfavorable compounds which affects the hydrolysis yield. Likewise, a low concentration of acid pre-treatment is more considerable than a high concentration acid due to lesser amounts of neutralizing agent being needed in the following steps and there will be less tendency to corrode the experimental equipment.…”

Section: Resultsmentioning

confidence: 99%

Effects of acids pre-treatment on the microbial fermentation process for bioethanol production from microalgae

Phwan

Chew

Sebayang

et al. 2019

Biotechnol Biofuels

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Background Microalgae are one of the promising feedstock that consists of high carbohydrate content which can be converted into bioethanol. Pre-treatment is one of the critical steps required to release fermentable sugars to be used in the microbial fermentation process. In this study, the reducing sugar concentration of Chlorella species was investigated by pre-treating the biomass with dilute sulfuric acid and acetic acid at different concentrations 1%, 3%, 5%, 7%, and 9% (v/v). Results 3,5-Dinitrosalicylic acid (DNS) method, FTIR, and GC-FID were employed to evaluate the reducing sugar concentration, functional groups of alcohol bonds and concentration of bioethanol, respectively. The two-way ANOVA results ( p < 0.05) indicated that there was a significant difference in the concentration and type of acids towards bioethanol production. The highest bioethanol yield obtained was 0.28 g ethanol/g microalgae which was found in microalgae sample pre-treated with 5% (v/v) sulfuric acid while 0.23 g ethanol/g microalgal biomass was presented in microalgae sample pre-treated with 5% (v/v) acetic acid. Conclusion The application of acid pre-treatment on microalgae for bioethanol production will contribute to higher effectiveness and lower energy consumption compared to other pre-treatment methods. The findings from this study are essential for the commercial production of bioethanol from microalgae.

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Section: Resultsmentioning

confidence: 99%

Effects of acids pre-treatment on the microbial fermentation process for bioethanol production from microalgae

Phwan

Chew

Sebayang

et al. 2019

Biotechnol Biofuels

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“…However, the finite supply of these fossil fuels and their contribution to greenhouse gas emission upon combustion are major challenges. It is therefore necessary to obtain an alternative source of energy [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Bioethanol production from sugarcane leaf waste: Effect of various optimized pretreatments and fermentation conditions on process kinetics

Moodley

2019

Biotechnology Reports

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Highlights Bioethanol kinetics was investigated under SSA-F, SSA-U, MSA-F and MSA-U conditions. Monod, logistic and modified Gompertz models gave R 2 > 0.97. SSA-U pretreated SLW produced 25% more bioethanol than MSA-U. No difference was observed between filtered and unfiltered enzymatic hydrolysate. SLW residue showed a suitable protein and fat content for animal feed.

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“…Microalgae are rich in proteins, lipids and carbohydrates and the relative amounts of these biochemical components vary amongst various microalgal strains [ 26 ]. These could be used as feedstock for the production of various high-value bio-based products such as biodiesel production from microalgal lipids, alternate carbon source in the fermentation industries of microalgal carbohydrates, health food supplements from long-chain fatty acids found in microalgae and in pharmaceutical applications [ 27 ]. Recent studies conducted on microalgae for the production of various biofuels are listed in Table 1 .…”

Section: Products From Algal Biorefinerymentioning

confidence: 99%

Recent developments in synthetic biology and metabolic engineering in microalgae towards biofuel production

Jagadevan

Banerjee

et al. 2018

Biotechnol Biofuels

206

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In the wake of the uprising global energy crisis, microalgae have emerged as an alternate feedstock for biofuel production. In addition, microalgae bear immense potential as bio-cell factories in terms of producing key chemicals, recombinant proteins, enzymes, lipid, hydrogen and alcohol. Abstraction of such high-value products (algal biorefinery approach) facilitates to make microalgae-based renewable energy an economically viable option. Synthetic biology is an emerging field that harmoniously blends science and engineering to help design and construct novel biological systems, with an aim to achieve rationally formulated objectives. However, resources and tools used for such nuclear manipulation, construction of synthetic gene network and genome-scale reconstruction of microalgae are limited. Herein, we present recent developments in the upcoming field of microalgae employed as a model system for synthetic biology applications and highlight the importance of genome-scale reconstruction models and kinetic models, to maximize the metabolic output by understanding the intricacies of algal growth. This review also examines the role played by microalgae as biorefineries, microalgal culture conditions and various operating parameters that need to be optimized to yield biofuel that can be economically competitive with fossil fuels.

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Synergistic effect of pretreatment and fermentation process on carbohydrate-rich Scenedesmus dimorphus for bioethanol production

Cited by 68 publications

References 32 publications

Effects of acids pre-treatment on the microbial fermentation process for bioethanol production from microalgae

Effects of acids pre-treatment on the microbial fermentation process for bioethanol production from microalgae

Bioethanol production from sugarcane leaf waste: Effect of various optimized pretreatments and fermentation conditions on process kinetics

Recent developments in synthetic biology and metabolic engineering in microalgae towards biofuel production

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