Biodiesel from microalgae: Recent progress and key challenges

Kim, Jee Young; Jung, Jong‐Min; Jung, Sungwook; Park, Young-Kwon; Tsang, Yiu Fai; Lin, Kun‐Yi Andrew; Choi, Young Joon; Kwon, Eilhann E.

doi:10.1016/j.pecs.2022.101020

Cited by 59 publications

(47 citation statements)

References 304 publications

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“…[16][17][18] However, the selection of a suitable catalyst, which is cheap and can work for a long time, is the main challenge of this process. [19][20][21][22][23][24][25][26][27] In addition, gasication occurs at high temperature (>700 °C), which requires a high source of heat and also special materials for the reactor. These lead to the high cost of operation.…”

Section: Introductionmentioning

confidence: 99%

A review on thermochemical based biorefinery catalyst development progress

Gholizadeh,

Castro,

Fabrega

et al. 2023

Sustainable Energy Fuels

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Section: Introductionmentioning

confidence: 99%

A review on thermochemical based biorefinery catalyst development progress

Gholizadeh,

Castro,

Fabrega

et al. 2023

Sustainable Energy Fuels

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“…Life cycle analysis of microalgae based products have been studied for various scenarios such as biofuels ( Huang et al., 2022 ; Kim et al., 2022 ), food and nutraceuticals ( Schade and Meier, 2020 ; Schade et al., 2020 ), multiproduct refineries ( Arashiro et al., 2022 ; Ubando et al., 2022 ) biofertilizers ( de Siqueira Castro et al., 2020 ; Arashiro et al., 2022 ). The major consensus among most of these studies is that the cultivation of microalgae in ORP is cheaper and less energy intensive compared to PBRs.…”

Section: Production Of Microalgae Based Bio Fertilizers and Biostimul...mentioning

confidence: 99%

Microalgae as next generation plant growth additives: Functions, applications, challenges and circular bioeconomy based solutions

2023

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Sustainable agriculture practices involve the application of environment-friendly plant growth promoters and additives that do not negatively impact the health of the ecosystem. Stringent regulatory frameworks restricting the use of synthetic agrochemicals and the increase in demand for organically grown crops have paved the way for the development of novel bio-based plant growth promoters. In this context, microalgae biomass and derived agrochemicals offer novel sources of plant growth promotors that enhance crop productivity and impart disease resistance. These beneficial effects could be attributed to the presence of wide range of biomolecules such as soluble amino acid (AA), micronutrients, polysaccharides, phytohormones and other signaling molecules in microalgae biomass. In addition, their phototrophic nature, high photosynthetic efficiency, and wide environmental adaptability make them an attractive source of biostimulants, biofertilizers and biopesticides. The present review aims to describe the various plant growth promoting metabolites produced by microalgae and their effects on plant growth and productivity. Further, the effects elicited by microalgae biostimulants with respect to different modes of applications such as seed treatments, foliar spray and soil/root drenching is reviewed in detail. In addition, the ability of microalgae metabolites to impart tolerance against various abiotic and biotic stressors along with the mechanism of action is discussed in this paper. Although the use of microalgae based biofertilizers and biostimulants is gaining popularity, the high nutrient and water requirements and energy intensive downstream processes makes microalgae based technology commercially unsustainable. Addressing this challenge, we propose a circular economy model of microalgae mediated bioremediation coupled with biorefinery approaches of generating high value metabolites along with biofertilizer applications. We discuss and review new trends in enhancing the sustainability of microalgae biomass production by co-cultivation of algae with hydroponics and utilization of agriculture effluents.

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“…Transesterification or fermentation produces biodiesel and bioethanol. Their production has been commercialized because of their technical maturity. , Nevertheless, biodiesel and bioethanol are produced from a partial mass fraction of carbon in the biomass. Biodiesel and bioethanol are synthesized by the transesterification of lipids and fermentation of carbohydrates in biomass, respectively .…”

Section: Introductionmentioning

confidence: 99%

Strategic Use of Extremophilic Microalgae as a Carbon Source in the Thermo-Chemical Process

Choi

Kwon

Lee

et al. 2023

ACS Sustainable Chem. Eng.

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Microalgal biomass has a high CO2 fixation and growth rate when using CO2 as a carbon source. Moreover, biomass can also be employed as a carbon resource to produce biofuels and chemicals. As the growth rate of extremophilic microalgae remains unaffected by harsh conditions, the present study proposes that these microalgae (such as Galdieria sulphuraria) are a rapidly growing carbon resource for syngas production. Hence, two different experiments were performed as part of this study: (1) cultivation of G. sulphuraria under outdoor conditions and (2) conversion of G. sulphuraria into syngas. The productivity of G. sulphuraria under mixotrophic condition (0.82 g L–1 d–1) was about 1.6 faster than a widely cultivated Chlorella sp. HS2. Moreover, G. sulphuraria was converted into syngas using CO2 as a co-feedstock. The simultaneous reduction of CO2 and the oxidation of volatile matter (VM) from the thermolysis of G. sulphuraria promoted syngas formation. The chemical reaction was influenced by the molecular size of the VMs. In the presence of the Ni catalyst, low-molecular-weight VMs were formed owing to chemical bond scissions. Syngas formation under CO2 doubled compared with that under inert conditions. The findings suggest that G. sulphuraria is a feasible carbon source for CO2 fixation and chemical production.

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Biodiesel from microalgae: Recent progress and key challenges

Cited by 59 publications

References 304 publications

A review on thermochemical based biorefinery catalyst development progress

A review on thermochemical based biorefinery catalyst development progress

Microalgae as next generation plant growth additives: Functions, applications, challenges and circular bioeconomy based solutions

Strategic Use of Extremophilic Microalgae as a Carbon Source in the Thermo-Chemical Process

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