Bioethanol from macroalgae: Prospects and challenges

Ramachandra, T. V.; Hebbale, Deepthi

doi:10.1016/j.rser.2019.109479

Cited by 125 publications

(43 citation statements)

References 178 publications

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“… [116] Another milestone in the biofuel production from algae was the engineering of the yeast S. cerevisiae for enzymatic hydrolysis of laminarin from brown macroalgae for the production of bioethanol. [117] Recent reviews summarize biofuel feedstocks including macroalgal [118] and related genetic engineering approaches. [119] …”

Section: Saccharification Processes For Marine Sugarsmentioning

confidence: 99%

Marine Polysaccharides: Occurrence, Enzymatic Degradation and Utilization

2021

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Macroalgae species are fast growing and their polysaccharides are already used as food ingredient due to their properties as hydrocolloids or they have potential high value bioactivity. The degradation of these valuable polysaccharides to access the sugar components has remained mostly unexplored so far. One reason is the high structural complexity of algal polysaccharides, but also the need for suitable enzyme cocktails to obtain oligo‐ and monosaccharides. Among them, there are several rare sugars with high value. Recently, considerable progress was made in the discovery of highly specific carbohydrate‐active enzymes able to decompose complex marine carbohydrates such as carrageenan, laminarin, agar, porphyran and ulvan. This minireview summarizes these achievements and highlights potential applications of the now accessible abundant renewable resource of marine polysaccharides.

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Section: Saccharification Processes For Marine Sugarsmentioning

confidence: 99%

Marine Polysaccharides: Occurrence, Enzymatic Degradation and Utilization

2021

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“…In addition, cyanobacteria is capable of converting the carbon fixed by photosynthesis to ethanol by introducing new genes [43]. In macroalgae, some kinds of green and red seaweeds have good ethanol yields [44]. Specifically, U. pertusa is able to produce 0.48 g ethanol/g algae with the fermentation of Saccharomyces cerevisiae ATCC24858 [45].…”

Section: Bioethanolmentioning

confidence: 99%

Systematic review and perspective on the progress of algal biofuels

et al. 2021

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In recognition of the increasing demand of energy and the worsening environmental problems linked with fossil fuels usage, algal biofuel has been proposed as one of the alternative energy sources. It has become one of the hottest topics in renewable energy field in the new century, especially over the past decade. In this review, we summarized the characteristics of different types of algae biofuels. Besides, an in-depth evaluation of the systematic cultivation and practical application of algae have been conducted. Although algal biofuel has a great potential, its unacceptably high cost limits the large-scale industrialization. In order to resolve such restrictions, feasible methods of improving the large scale production and practical application of algal biofuels are proposed. Future efforts should be focused not only on the cost reduction and innovation techniques, but also towards high value by-products to maximize economic benefits. Our results are dedicated to provide valuable references for subsequent research and guidelines on algae biofuels field.

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“…At present, farming seaweeds for energy production remains non-economically viable, and it would possibly need to be coupled to prior use of the same seaweeds (as waste) that first are used for other purposes, in a MUZE (multiple-use zero effluent) or biorefinery approach such as pollution abatement (Michalak 2020b ). In addition to access to sufficient biomass (many millions of metric tonnes in continuous production) of many types of seaweeds for industrial, large-scale biofuel production, there are major scientific and technological challenges involved with design and development of enzyme systems that effectively can break down seaweed polysaccharides into fermentable sugars (Maneein et al 2018 ; Ramachandra and Hebbale 2020 ).…”

Section: Seaweeds For Sustainable Energymentioning

confidence: 99%

Saved by seaweeds: phyconomic contributions in times of crises

et al. 2020

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Seaweeds (macroalgae) are, together with microalgae, main contributors to the Earth’s production of organic matter and atmospheric oxygen as well as fixation of carbon dioxide. In addition, they contain a bounty of fibres and minerals, as well as macro- and micronutrients that can serve both technical and medicinal purposes, as well as be a healthy and nutritious food for humans and animals. It is therefore natural that seaweeds and humans have had a myriad of interwoven relationships both on evolutionary timescales as well as in recent millennia and centuries all the way into the Anthropocene. It is no wonder that seaweeds have also entered and served as a saviour for humankind around the globe in many periods of severe needs and crises. Indeed, they have sometimes been the last resort, be it during times of famine, warfare, outbreak of diseases, nuclear accidents, or as components of securing the fabric of social stability. The present topical review presents testimony from the history of human interaction with seaweeds to the way humankind has, over and over again, been ‘saved by seaweeds’. It remains a historical fact that in extreme conditions, such as shortage and wars, humans have turned to seaweeds in times of ‘needs must’ and created new opportunities for their uses in order to mitigate disasters. Lessons to be learned from this history can be used as reminders and inspiration, and as a guide as how to turn to seaweeds in current and inevitable, future times of crises, not least for the present needs of how to deal with changing climates and the pressing challenges of sustainable and healthy eating.

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Bioethanol from macroalgae: Prospects and challenges

Cited by 125 publications

References 178 publications

Marine Polysaccharides: Occurrence, Enzymatic Degradation and Utilization

Marine Polysaccharides: Occurrence, Enzymatic Degradation and Utilization

Systematic review and perspective on the progress of algal biofuels

Saved by seaweeds: phyconomic contributions in times of crises

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