Progress in Microalgae Application for CO2 Sequestration

Ighalo, Joshua O.; Dulta, Kanika; Kurniawan, Setyo Budi; Omoarukhe, Fredrick O.; Ewuzie, Ugochukwu; Eshiemogie, Steve Oshiokhai; Ojo, Alaba U.; Abdullah, Siti Rozaimah Sheikh

doi:10.1016/j.clce.2022.100044

Cited by 42 publications

(24 citation statements)

References 89 publications

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“…Energy required for heating cultures in ORP and the energy required for injecting CO 2 and maintaining the flow of cultures in PBRs and supply of reduced organic carbon sources in mixotrophic or heterotrophic cultivation are some critical factors that negatively influence microalgae based processes ( Ighalo et al., 2022 ). Microalgae based processes had relatively lower land and water use compared to aquaculture processes, however, in comparison to poultry and insect farming the water and nutrient requirements were relatively higher for microalgae biomass production ( Maiolo et al., 2020 ; Schade et al., 2020 ).…”

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

confidence: 99%

“…Microalgae have the unique ability to grow in non-potable waters and have excellent bioremediation potential with high removal efficiencies against nitrates, phosphates, and ammonia in waste streams and reduce the chemical (COD) and biological oxygen demand (BOD) of wastewaters ( Ahmed et al., 2022 ; Díaz et al., 2022 ). Further, the ability to use industrial flue gas as a source of CO 2 and the presence of carbon concentration mechanism in microalgae make them an attractive resource for dual applications of bioremediation and metabolite/biomass production ( Çakirsoy et al., 2022 ; Ighalo et al., 2022 ; Ma et al., 2022 ).…”

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

confidence: 99%

“…However, the process is economically unviable owing to the high capital and energy inputs reducing sustainability. Apart from the light requirements, some of the other critical challenges involved in microalgae biomass production are high water footprint, high nutrient costs, and energy-intensive downstream processing ( Maiolo et al., 2020 ; Ighalo et al., 2022 ). These challenges offset the benefits imparted by the microalgae biomass for agriculture applications necessitating sustainable microalgae bioprocesses.…”

Section: Introductionmentioning

confidence: 99%

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

confidence: 99%

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

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

2023

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“…For instance, the microalgae used for food production have a higher protein content (above 50%) than fungi used for SCP production (30-50%), contain healthy fats (omega-3 fatty acids and carotenoids), vitamins A, B, C, and E, mineral salts, and chlorophyll, and possess a relatively low nucleic acid content (3-8%). Additionally, they have a fast growth rate and a simple structure that make their CO2 bio-fixation efficiency 10-50 times higher than that of terrestrial plants [13]. They are able to divide their cells within 3-4 h but mostly divide every 1-2 days under favourable growing conditions.…”

Section: Microalgae For Single-cell Protein Productionmentioning

confidence: 99%

Microalgae cultivation: from CO₂ fixation to single-cell protein production

Ibrahim Mze,

Azmi,

Mohd Puad

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Bio-sequestration of CO2 using microalgae to recycle CO2 into valuable products such as single-cell proteins (SCP) is one of the most promising fields nowadays. Microalgae are able to use CO2 as their carbon source and subsequently build carbohydrates, proteins, nucleic acids, and lipids. Nevertheless, all microalgae strains do not have the same CO2 tolerance and culture conditions. Moreover, pure CO2 is less soluble in water, which leads to a low carbon capture and fixation rate. Thus, to optimise SCP production in relation to CO2 mitigation, studies of the enhancement of solubilization of CO2 in water as well as the determination of the optimum process parameter for CO2 fixation and SCP production need to be done. Consequently, this study aims to review the cultivation conditions for single-cell protein production.

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“…The advantages of microalgae—such as low sulfur emission, short life cycle, and high biomass production—have also shifted the spotlight from fossil fuels to microalgae as an alternative source of biodiesel [ 10 , 11 ]. At present, more research works on microalgae are directed towards efficient CO 2 sequestration [ 12 ], treatment of sewage [ 13 ], and pigments in cosmetics [ 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Quantifying Microalgae Growth by the Optical Detection of Glucose in the NIR Waveband

et al. 2023

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Microalgae have become a popular area of research over the past few decades due to their enormous benefits to various sectors, such as pharmaceuticals, biofuels, and food and feed. Nevertheless, the benefits of microalgae cannot be fully exploited without the optimization of their upstream production. The growth of microalgae is commonly measured based on the optical density of the sample. However, the presence of debris in the culture and the optical absorption of the intercellular components affect the accuracy of this measurement. As a solution, this paper introduces the direct optical detection of glucose molecules at 940–960 nm to accurately measure the growth of microalgae. In addition, this paper also discusses the effects of the presence of glucose on the absorption of free water molecules in the culture. The potential of the optical detection of glucose as a complement to the commonly used optical density measurement at 680 nm is discussed in this paper. Lastly, a few recommendations for future works are presented to further verify the credibility of glucose detection for the accurate determination of microalgae’s growth.

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Progress in Microalgae Application for CO2 Sequestration

Cited by 42 publications

References 89 publications

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

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

Microalgae cultivation: from CO₂ fixation to single-cell protein production

Quantifying Microalgae Growth by the Optical Detection of Glucose in the NIR Waveband

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Progress in Microalgae Application for CO2 Sequestration

Cited by 42 publications

References 89 publications

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

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

Microalgae cultivation: from CO2 fixation to single-cell protein production

Quantifying Microalgae Growth by the Optical Detection of Glucose in the NIR Waveband

Contact Info

Product

Resources

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Microalgae cultivation: from CO₂ fixation to single-cell protein production