Microalgae Biomass as Biofuel and the Green Applications

Yu, Kai Ling; Ong, Hwai Chyuan; Zaman, Halimah Badioze

doi:10.3390/en15197280

Cited by 3 publications

(1 citation statement)

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“…In particular, the cultivation of marine species compares favorably with both freshwater species and grass crops, both because valuable irrigation resources are not lost and because it is possible to use coastal or degraded saline soils for cultivation [7]. In many countries of the world, the cultivation of marine microalgae serves productive purposes in a wide range of applications, from live food in fish hatcheries, feed production, biofuel production, soil remediation and fertilization, water decontamination, chemical production and pharmaceutical and cosmetic substances to direct human consumption and the production of valuable antioxidant pigments [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Quantity and Quality of Light on Growth and Pigment Content of Dunaliella sp. and Anabaena sp. Cultures and the Use of Their Absorption Spectra as a Proxy Method for Assessment

Hotos

2023

JMSE

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(1) Background: As microalgae cultures are affected by the quantity and quality of light, I explored this for two species. Additionally, I introduced a novel easy and economical way for the growers to easily and economically ascertain continuously with satisfactory accuracy the quantitative and qualitative status of their culture using absorption spectra. (2) Methods: The locally isolated chlorophyte Dunaliella sp. and the cyanobacterium Anabaena sp. were cultured in small volumes with two intensities of white light (2000 and 8000 lux) and with green, blue and red light, and the increase in their biomass and pigments was studied. Pigment analyses, continuous recordings of absorption spectra and calibration curves were used. (3) Results: The intensity of 8000 lux of white light yielded the highest increase in biomass, chlorophylls and carotenoids in Dunaliella sp., and the same was found for green and blue light, while 2000 lux and green light caused the greatest increase in biomass and phycocyanin in Anabaena sp. From the absorption spectra, the evolution of the pigment content can be estimated, and both pigments and biomass are correlated very strongly with those extracted from the spectra absorption of 750 nm. (4) Conclusions: The use of absorption spectra as an easy, fast and economical method can be a useful tool for a good approximation of the state of the microalgae culture. This is clearly shown when the spectra of the cultures under different light intensities and colors are compared having a catalytic effect on the level of the pigments leading to the increase in carotenoids and phycocyanin of the green light.

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Section: Introductionmentioning

confidence: 99%

Quantity and Quality of Light on Growth and Pigment Content of Dunaliella sp. and Anabaena sp. Cultures and the Use of Their Absorption Spectra as a Proxy Method for Assessment

Hotos

2023

JMSE

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Quantity and Quality of Light on Growth and Pigment Content of <em>Dunaliella</em> sp. and <em>Anabaena</em> sp. Cultures and the Use of Their Absorption Spectra as a Proxy Method for Assessment

Hotos¹

2023

Preprint

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(1) Background: Microalgae cultures are greatly facilitated if growers can easily and economically ascertain the quantitative and qualitative status of the culture continuously with satisfactory ac-curacy. (2) Methods: The locally isolated microalgae Dunaliella sp. and Anabaena sp. were cultured in small volumes with 2 intensities of white light (2000 and 8000 lux) and with green, blue and red light and the increase of their biomass and pigments was studied. Pigment analyses, continuous recordings of absorption spectra and calibration curves were performed. (3) Results: The intensity of 8000 lux white light yielded the highest increase in biomass, chlorophylls and carotenoids in Dunaliella sp. while 2000 lux and green light caused the greatest increase in biomass and phy-cocyanin in Anabaena sp. From the examination of the absorption spectra, the evolution of the pigment content can be estimated and both pigments and biomass are correlated very satisfactorily with the wavelength of 750 nm. (4) Conclusions: The use of absorption spectra as an easy, fast and economical method can be a useful tool for a good approximation of the state of the microalgae culture. This is clearly shown when the spectra of the culture under different lighting colors are compared which have a catalytic effect on the level of the pigments leading to the increase in carotenoids and phycocyanin of the green light.

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Composite Liquid Biofuels for Power Plants and Engines: Review

et al. 2023

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The problems of environmental pollution caused by the operation of power plants and engines motivate researchers to develop new biofuels. The environmental aspect of composite biofuels appears to have great potential because of the carbon neutrality of plant raw materials. This study analyzes recent advances in the production of biofuels and their application. The research findings on the properties of promising plant raw materials and their derivatives have been systematized. The most important stages (spraying, ignition, and combustion) of using biofuels and mixtures based on them in internal combustion engines have been analyzed. A separate section reviews the findings on the environmental aspect of using new fuel compositions. Most studies show great prospects for involving bio-components in the development of composite fuels. The real issue is to adjust existing engines and plants to non-conventional fuel mixtures. Another big problem is the increased viscosity and density of biofuels and oils, as well as the ambiguous effect of additives on burnout completeness and emissions. The impact of the new kinds of fuels on the condition of components and parts of engines, corrosion, and wear remains understudied. The interrelation of industrial process stages (from feedstock to an engine and a plant) has not been closely examined for composite liquid fuels. It is important to organize the available data and develop unified and adaptive technologies. Within the framework of this review work, scientific approaches to solving the above problems were considered and systematized.

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Microalgae Biomass as Biofuel and the Green Applications

Abstract: With the increasing concern on the global energy security and environmental sustainability [...]

Cited by 3 publications

References 31 publications

Quantity and Quality of Light on Growth and Pigment Content of Dunaliella sp. and Anabaena sp. Cultures and the Use of Their Absorption Spectra as a Proxy Method for Assessment

Quantity and Quality of Light on Growth and Pigment Content of Dunaliella sp. and Anabaena sp. Cultures and the Use of Their Absorption Spectra as a Proxy Method for Assessment

Quantity and Quality of Light on Growth and Pigment Content of <em>Dunaliella</em> sp. and <em>Anabaena</em> sp. Cultures and the Use of Their Absorption Spectra as a Proxy Method for Assessment

Composite Liquid Biofuels for Power Plants and Engines: Review

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