Endogenous bioethanol production by solid-state prefermentation for enhanced crude bio-oil recovery through integrated hydrothermal liquefaction of seaweeds

El‐Hefnawy, Mohamed E.; Alhayyani, Sultan; El‐Sherbiny, Mohsen M.; Abomohra, Abd El‐Fatah; Al-Harbi, Mamdouh

doi:10.1016/j.jclepro.2022.131811

Cited by 12 publications

(3 citation statements)

References 47 publications

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“…For example, the ratio of six-and five-carbon sugars is vital for selecting the appropriate fermentation microorganism and the method of bioethanol production. All varieties of macroalgae [126,127] and seagrass [19,21] can potentially undergo fermentation to produce bioethanol by converting their carbohydrates into simple sugars, followed by the use of suitable fermentable microorganisms. The successful fermentation of bioethanol relies on converting carbohydrates (such as starch, cellulose, laminarin, and/or floridean starch) into simple fermentable sugars, with careful selection of the right microorganism to perform the fermentation process.…”

Section: Marine Biomass Conversion Into Bioethanolmentioning

confidence: 99%

“…In addition, low-cost feedstocks with high content of non-structural components (NSC), such as poplar chips, were reported to improve ethanol production without detoxification processes [219]. Moreover, extracting value-added products from seaweeds before fermentation can generate additional income and serve as a pretreatment step for the biomass [126]. Furthermore, the integration of different conversion routes could significantly impact the energy yield, necessitating a thorough assessment and research.…”

Section: Co-fermentationmentioning

confidence: 99%

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Exploring the Prospects of Fermenting/Co-Fermenting Marine Biomass for Enhanced Bioethanol Production

Osman,

Abo-Shady,

Elshobary

et al. 2023

Fermentation

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With the rising demands for renewable fuels, there is growing interest in utilizing abundant and sustainable non-edible biomass as a feedstock for bioethanol production. Macroalgal biomass contains a high content of carbohydrates in the form of special polysaccharides like alginate, agar, and carrageenan that can be converted to fermentable sugars. In addition, using seagrass as a feedstock for bioethanol production can provide a sustainable and renewable energy source while addressing environmental concerns. It is a resource-rich plant that offers several advantages for bioethanol production, including its high cellulose content, rapid growth rates, and abundance in coastal regions. To reduce sugar content and support efficient microbial fermentation, co-fermentation of macroalgae with seagrass (marine biomass) can provide complementary sugars and nutrients to improve process yields and economics. This review comprehensively covers the current status and future potential of fermenting macroalgal biomass and seagrass, as well as possible combinations for maximizing bioethanol production from non-edible energy crops. An overview is provided on the biochemical composition of macroalgae and seagrass, pretreatment methods, hydrolysis, and fermentation processes. Key technical challenges and strategies to achieve balanced co-substrate fermentation are discussed. The feasibility of consolidated bioprocessing to directly convert mixed feedstocks to ethanol is also evaluated. Based on current research, macroalgae-seagrass co-fermentation shows good potential to improve the bioethanol yields, lower the cost, and enable more optimal utilization of diverse marine biomass resources compared to individual substrates.

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Section: Marine Biomass Conversion Into Bioethanolmentioning

confidence: 99%

Section: Co-fermentationmentioning

confidence: 99%

Exploring the Prospects of Fermenting/Co-Fermenting Marine Biomass for Enhanced Bioethanol Production

Osman,

Abo-Shady,

Elshobary

et al. 2023

Fermentation

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“…Therefore, R&D for algae-based biofuels in the last decade has grown considerably to counter these issues. Specifically, marine microalgae [45,46] and seaweed [47,48] have been discussed as potential feedstocks for integrated biofuel production, seawater desalination, and heavy metal removal. In that context, net energy of 11.0 GJ ton −1 of dry weight (dw) can be generated from seaweed, compared to 9.5 GJ ton −1 dw from microalgae, both of which are much higher than that of terrestrial plants.…”

Section: Potential Of Marine Resources For Biofuel Productionmentioning

confidence: 99%

Integrated Marine Biogas: A Promising Approach towards Sustainability

et al. 2022

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Fossil fuel depletion, climate change, and increased global energy demands are the driving forces to find alternative sources of energy. Marine-based biorefinery has been recently discussed as a promising route to mitigate the environmental challenges, enhance the energy recovery, and provide a potential source for value-added products. Anaerobic digestion is a promising technology that can convert the organic compounds of marine ecosystems into biogas. To date, a comprehensive review incorporating integrated biogas potential and effective approaches to enhance seaweed digestibility for biogas production from marine resources has not been reported. Thus, the present review aims to explore and comprehensively present seaweed and other marine resources for potential biogas production. The basics and challenges of biogas production from seaweed are elucidated. The impact of biochemical composition on biogas and the microbial communities involved in anaerobic digestion of seaweed are discussed. Utilization of different techniques such as pretreatment, co-digestion, and sequential extraction of seaweed biomass to enhance the biogas yield and to mitigate the effect of inhibitors are presented. Specifically, this article evaluates the co-digestion of seaweed with other biomass feedstocks or liquid biowastes. Integration of marine microalgae cultivation on anaerobic digestate for value-added compound production, biogas upgrading, and bioenergy recovery provides a promising approach towards a zero-waste marine-based system.

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Sustainable bioethanol production by solid-state fermentation: a systematic review

Ruslan,

Ahmad,

Abas

et al. 2024

Environ Sci Pollut Res

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Endogenous bioethanol production by solid-state prefermentation for enhanced crude bio-oil recovery through integrated hydrothermal liquefaction of seaweeds

Cited by 12 publications

References 47 publications

Exploring the Prospects of Fermenting/Co-Fermenting Marine Biomass for Enhanced Bioethanol Production

Exploring the Prospects of Fermenting/Co-Fermenting Marine Biomass for Enhanced Bioethanol Production

Integrated Marine Biogas: A Promising Approach towards Sustainability

Sustainable bioethanol production by solid-state fermentation: a systematic review

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