Emerging microalgae-based technologies in biorefinery and risk assessment issues: Bioeconomy for sustainable development

Sharma, Pooja; Srinivas, Gujjala Lohit Kumar; Varjani, Sunita; Kumar, Sunil

doi:10.1016/j.scitotenv.2021.152417

Cited by 33 publications

(4 citation statements)

References 180 publications

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“…Cyanobacteria and microalgae can utilize the photosynthesis process to transform CO 2 into organic matter. Some macroalgae, such as seaweed, crustose coralline algae, and seagrasses are most efficient organisms comparatively than small microalgae for sequestering CO 2 proficiently. − This strategy is both sustainable and environmentally friendly because CO 2 from biomass energy can be fixed and transformed by photosynthetic organisms such as plants and microalgae. Some of the photosynthetic microalgae are listed in Table .…”

Section: Biological Methods Of Carbon Dioxide (Co2) Sequestrationmentioning

confidence: 99%

Review and Perspectives of Emerging Green Technology for the Sequestration of Carbon Dioxide into Value-Added Products: An Intensifying Development

Kumar

Jujjavarapu

2023

Energy Fuels

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Global warming has emerged as a major problem for humanity in this anthropocentric period. The constantly rising amount of carbon dioxide (CO 2 ) in the atmosphere has caused global warming, which has caused a series of changes in the Earth's climate and weather systems. Rapid anthropogenic activity such as industrialization and urbanization has led to increasing the CO 2 level in the environment. CO 2 is captured and utilized as the carbon source for synthesizing various value-added products through physical and chemical methods. However, the physical and chemical techniques do not provide an ecologically friendly or costeffective procedure. Some advanced innovative, environmentally friendly green methods based on photosynthesis, microbial electrosynthesis, and gas fermentation processes can help to clean the atmosphere by sequestering CO 2 and producing value-added products from CO 2 . This approach has the potential to reduce greenhouse gas emissions, increase productivity, and create new economic opportunities. In this review, we found that the photosynthetic process has a high capacity for CO 2 sequestration. In contrast, the microbial electrosynthesis and gas fermentation processes have a high efficiency of value-added product synthesis. These biological CO 2 sequestration technologies contribute to the sustainability of the global carbon process. However, each method has its own strengths and weaknesses, and the choice of method will depend on the specific goals and resources of a sequestration project. This report also defined the various influencing factors of photosynthetic, microbial electrosynthesis, and gas fermentation processes for optimized development of these technologies, while challenges and future directions are also discussed.

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Section: Biological Methods Of Carbon Dioxide (Co2) Sequestrationmentioning

confidence: 99%

Review and Perspectives of Emerging Green Technology for the Sequestration of Carbon Dioxide into Value-Added Products: An Intensifying Development

Kumar

Jujjavarapu

2023

Energy Fuels

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“…The closed system of microalgae biomass production involves the use of a closed photoreactor for the cultivation of microalgae biomass (Xu et al, 2009). This system has high microalgae biomass productivity and a high reduction in the risks of contamination (Sharma et al, 2022). The system favours the ability of microalgae to fix and convert CO 2 into microalgae biomass and aids in the production of bioresources of interest (Ebhodaghe et al, 2022).…”

Section: Microalgae Biomass Productionmentioning

confidence: 99%

Microalgae Biomass Modelling and Optimization for Sustainable Biotechnology – A Concise Review

Ugya¹,

Meguellati²

2022

J. Ecol. Eng.

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The autotrophic forms of microalgae are referred to as "efficient biological factories", because they play a significant role in CO 2 removal from the atmosphere by utilizing it for the process of photosynthesis. The industrial application of microalgae biomass includes the production of cosmetics, health products, fertilisers, biofuel, feeds, and food. Microalgae biomass is also an important tool used in the treatment of wastewater. The current review is aimed at reviewing the progress and prospects of microalgae resource modelling and optimisation as a tool for sustainable biotechnology. The mechanism of biomass production by microalgae tends to vary according to whether the microalgae are autotrophic, heterotrophic, or mixotrophic organisms. In the current study, the modelling and optimisation of microalgae biomass production were discussed, as well as the modelling of CO 2 sequestration, light intensity, nutrients, and photobioreactor. The role of microalgal biomass production in attaining sustainable biotechnology has also been extensively studied. Microalgae are an emerging tool used in the phycoremediation of wastewater and reduction of high CO 2 level. The modelling and optimisation of microalgae biomass production will help to upscale the production of the microalgal based fuel and bioproducts from model scale to the money-making level.

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“…Algal biomass grown using HTWW can be further used for biofuel production and various bioactive compounds production [68]. Studies on HTL of various algal strains including Spirulina, Nannochloropsis, Chlorella, Dunaliella and Botryococcus braunii under different process conditions have been reported by several researchers [37,38,[69][70][71][72][73][74]. The reported yield of biooil was in the range of 40-60%.…”

Section: Microalgae Cultivation Using Wastewater Generated From Hydro...mentioning

confidence: 99%

Recent Advancements in Microalgal Mediated Valorisation of Wastewater from Hydrothermal Liquefaction of Biomass

et al. 2022

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Hydrothermal liquefaction (HTL) is an evolving technology that can convert waste with high moisture and low energy content to electricity, heat, hydrogen and other synthetic fuels more efficiently. The lee Review article side is that the HTL process produces enormous amounts of wastewaters (HTWW), having high organic and nutrient load. The discharge of the HTWW would contaminate the environment and result in the loss of valuable bioenergy sources. The valorization of HTWW has drawn considerable interest. Therefore, this review highlights the valorization of wastewater during the HTL of biomass. The review paper begins with the discussion of the role of microalgae in valorizing the HTWW. The survey illustrates that the selection of appropriate technology is dependent on biomass characteristics of the microalgae. Finally, potential research opportunities are recommended to improve the viability of the HTL wastewater valorization for bioenergy production. Overall, this review concludes that combining various processes, such as microalgae-anaerobic digestion, and bio-electrochemical system -microalgae-anaerobic digestion would be beneficial in maximizing HTWW valorization.

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Emerging microalgae-based technologies in biorefinery and risk assessment issues: Bioeconomy for sustainable development

Cited by 33 publications

References 180 publications

Review and Perspectives of Emerging Green Technology for the Sequestration of Carbon Dioxide into Value-Added Products: An Intensifying Development

Review and Perspectives of Emerging Green Technology for the Sequestration of Carbon Dioxide into Value-Added Products: An Intensifying Development

Microalgae Biomass Modelling and Optimization for Sustainable Biotechnology – A Concise Review

Recent Advancements in Microalgal Mediated Valorisation of Wastewater from Hydrothermal Liquefaction of Biomass

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