Current advances in microalgae harvesting and lipid extraction processes for improved biodiesel production: A review

Vasistha, Shrasti; Khanra, Anwesha; Clifford, M.J.; Prakash, Monika

doi:10.1016/j.rser.2020.110498

Cited by 132 publications

(55 citation statements)

References 190 publications

(166 reference statements)

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“…Nevertheless, PBRs can promote the axenic status of the culture, and are therefore, more appropriate for the production of high value/low volume compounds like bioactive and pharmaceuticals compounds (Chang et al, 2018). In addition, with the harvesting with lipid production accounting for 90% of total energy demand and 20-30% of the total production cost, flocculation has been considered a low operational and energy cost in recent years, with an operation and energy cost of €0.1-0.6/kg and 0.1-0.7 k Wh/kg biomass respectively for closed cultivation (Muhammad et al, 2021;Vasistha et al, 2021). In particular, flocculation facilitated by other organisms (Mofijur et al, 2021), such as fungus (Chen J. et al, 2018) or natural coagulants (Li et al, 2020), can make for cost-effective recovery with costs as low as $0.825 and $0.037, respectively.…”

Section: Economic Analysis Of Microalgae-based Biorefinerymentioning

confidence: 99%

Strategies to Produce Cost-Effective Third-Generation Biofuel From Microalgae

et al. 2021

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Third-generation biofuel produced from microalgae is a viable solution to global energy insecurity and climate change. Despite an annual current global algal biomass production of 38 million litres, commercialization confronts significant economic challenges. However, cost minimization strategies, particularly for microalgae cultivation, have largely been excluded from recent studies. Therefore, this review provides essential insights into the technologies and economics of cost minimization strategies for large-scale applications. Cultivation of microalgae through aquafarming, in wastewater, or for biogas upgrading, and co-production of value-added products (VAPs) such as photo-bioreactors, protein, astaxanthin, and exopolysaccharides can drastically reduce biodiesel production costs. For instance, the co-production of photo-bioreactors and astaxanthin can reduce the cost of biodiesel production from $3.90 to $0.54 per litre. Though many technical challenges need to be addressed, the economic analysis reveals that incorporating such cost-effective strategies can make the biorefinery concept feasible and profitable. The cost of producing microalgal biodiesel can be lowered to $0.73kg−1 dry weight when cultivated in wastewater or $0.54L−1 when co-produced with VAPs. Most importantly, access to co-product markets with higher VAPs needs to be encouraged as the global market for microalgae-based VAPs is estimated to rise to $53.43 billion in 2026. Therefore, policies that incentivize research and development, as well as the production and consumption of microalgae-based biodiesel, are important to reduce the large gap in production cost that persists between biodiesel and petroleum diesel.

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Section: Economic Analysis Of Microalgae-based Biorefinerymentioning

confidence: 99%

Strategies to Produce Cost-Effective Third-Generation Biofuel From Microalgae

et al. 2021

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“…Therefore, countries around the world are still dedicated to the development of new feedstock for biodiesel production. Among various new feedstocks, microalgae have become feedstock for thirdgeneration (3G) biodiesel because microalgae have a higher growth rate and utilization efficiency of solar energy than terrestrial oil-producing crops [130]. Microalgal oil production per unit of cultivated area is greater than that of other oil-producing crops [110].…”

Section: Biodieselmentioning

confidence: 99%

Cultivation and Biorefinery of Microalgae (Chlorella sp.) for Producing Biofuels and Other Byproducts: A Review

et al. 2021

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Microalgae-based carbon dioxide (CO2) biofixation and biorefinery are the most efficient methods of biological CO2 reduction and reutilization. The diversification and high-value byproducts of microalgal biomass, known as microalgae-based biorefinery, are considered the most promising platforms for the sustainable development of energy and the environment, in addition to the improvement and integration of microalgal cultivation, scale-up, harvest, and extraction technologies. In this review, the factors influencing CO2 biofixation by microalgae, including microalgal strains, flue gas, wastewater, light, pH, temperature, and microalgae cultivation systems are summarized. Moreover, the biorefinery of Chlorella biomass for producing biofuels and its byproducts, such as fine chemicals, feed additives, and high-value products, are also discussed. The technical and economic assessments (TEAs) and life cycle assessments (LCAs) are introduced to evaluate the sustainability of microalgae CO2 fixation technology. This review provides detailed insights on the adjusted factors of microalgal cultivation to establish sustainable biological CO2 fixation technology, and the diversified applications of microalgal biomass in biorefinery. The economic and environmental sustainability, and the limitations and needs of microalgal CO2 fixation, are discussed. Finally, future research directions are provided for CO2 reduction by microalgae.

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“…Microalgae biomass is separate from the medium, which is a key step for large scale biodiesel production contributing 20-30% of total biodiesel production cost [77][78][79][80]. Due to their microscopic size (1-10 µm diameter), the separation of microalgal biomass from the medium is the most challenging step [81].…”

Section: Harvesting Of Microalgaementioning

confidence: 99%

Food Industries Wastewater Recycling for Biodiesel Production through Microalgal Remediation

et al. 2021

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This article is an overview of a biosystem of food-industry wastewater (WW) treatment using microalgae towards circular bioeconomy through biosynthesis of compounds of added-value. Focusing on circular bioeconomy with concern to environmental pollution, the management of water-resource and energy-crisis could be combined; by upgrading conventional WW treatment and simultaneously producing a renewable and sustainable source of energy algal-lipids for biodiesel production. Phyco-remediation of food WW using microalgae has revealed many advantages that can fulfill new demands for the WW treatment. WWs can be valuable resources of micronutrients and organic content (carbon source) for algal cultivation. In this review, prospective routes for the production of value-added compounds (polysaccharides, amino acids, biofuels, and biopigments) along with the bioremediation of food industry WW have been discussed. Furthermore, limitations and issues of phyco-remediation of WW using microalgae have also been reviewed with perspectives for further research and development.

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Current advances in microalgae harvesting and lipid extraction processes for improved biodiesel production: A review

Cited by 132 publications

References 190 publications

Strategies to Produce Cost-Effective Third-Generation Biofuel From Microalgae

Strategies to Produce Cost-Effective Third-Generation Biofuel From Microalgae

Cultivation and Biorefinery of Microalgae (Chlorella sp.) for Producing Biofuels and Other Byproducts: A Review

Food Industries Wastewater Recycling for Biodiesel Production through Microalgal Remediation

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