Practical strategies to improve harvestable biomass energy yield in microalgal culture: A review

Hajinajaf, Nima; Mehrabadi, Abbas; Tavakoli, Omid

doi:10.1016/j.biombioe.2020.105941

Cited by 61 publications

(14 citation statements)

References 138 publications

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“…Cogeneration is the process of generating heat and electricity at the same time. In cogeneration systems, lower emissions of pollutants are achieved [ 76 ].…”

Section: Commercialization Of Biomass Technologiesmentioning

confidence: 99%

Utilization of Biomass to Ash: An Overview of the Potential Resources for Alternative Energy

et al. 2021

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Climate change and the potential depletion of fossil fuels have increased international demand for alternative and renewable energy sources. In terms of the energy sector, for example, most of the South-East Asian countries (SACs) have a large number of biomass sources due to their vast forest resources and agriculture-based economies. Thus, the critical review was aimed at highlighting the overview of biomass energy in South-East Asia as a dynamically developing region, in order to obtain economic and environmental benefits from the existing sources of biomass in the world. The current review analyzed the sources of biomass, as well as their energy potential, use, and management, based on reports from different countries, published studies, and scientific articles. In SAC, the main sources of biomass were found to be coconut residues, oil palm residues, sugar cane residues, rice straw, rice husks, wood waste, and firewood. The combined annual biomass potentials in the forestry and agricultural sectors in South-East Asia were approximately over 500 million tons per year and more than 8 gigajoule of total energy potentials. The study identified the challenges and barriers to using biomass in these countries to achieve sustainable use of biomass sources and recommended sustainable approaches to using biomass energy by comparing traditional uses of biomass. Smart grid technologies have ways for solutions for better electric power production and efficient ways for distribution and transmission of electricity. Smart grids require less space and can be more easily installed when compared to traditional grids because of their versatilities. Upcoming challenges include technology optimization for the following uses of biomass energy: direct combustion of woody biomass; pyrolysis and gasification of biomass; anaerobic digestion of organic waste to produce biogas; landfill gas production direct incineration of organic waste. The barriers in this technology are emissions of carbon and nitrogen oxides, unpleasant odors, as well as the uncontrolled harvesting of biomass, which can harm nature.

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“…Cogeneration is the process of generating heat and electricity at the same time. In cogeneration systems, lower emissions of pollutants are achieved [ 76 ].…”

Section: Commercialization Of Biomass Technologiesmentioning

confidence: 99%

Utilization of Biomass to Ash: An Overview of the Potential Resources for Alternative Energy

et al. 2021

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“…The power source comprises a combination of voltage and current, frequency profile, and harmonics. There are a number of issues that may arise with environmental ambient sources, such as distortion of voltage due to current harmonics, flicker, voltage sag, and voltage surge [161,162]. Moreover, because of the geometric shapes and proper material selection problem of the EMEH devices, more research is necessary to improve the efficiency power [163][164][165].…”

Section: Issues and Challengesmentioning

confidence: 99%

Review of Power Converter Impact of Electromagnetic Energy Harvesting Circuits and Devices for Autonomous Sensor Applications

et al. 2021

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The demand for power is increasing due to the rapid growth of the population. Therefore, energy harvesting (EH) from ambient sources has become popular. The reduction of power consumption in modern wireless systems provides a basis for the replacement of batteries with the electromagnetic energy harvesting (EMEH) approach. This study presents a general review of the EMEH techniques for autonomous sensor (ATS) applications. Electromagnetic devices show great potential when used to power such ATS technologies or convert mechanical energy to electrical energy. As its power source, this stage harvests ambient energy and features a self-starting and self-powered process without the use of batteries. Therefore, it consumes low power and is highly stable for harvesting energy from the environment with low ambient energy sources. The review highlights EMEH circuits, low power EMEH devices, power electronic converters, and controllers utilized in numerous applications, and described their impacts on energy conservation, benefits, and limitation. This study ultimately aims to suggest a smart, low-voltage electronic circuit for a low-power sensor that harvests electromagnetic energy. This review also focuses on various issues and suggestions of future EMEH for low power autonomous sensors.

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“…An extended bioprospecting of microalgal biodiversity and chemodiversity, focusing on different families of compounds, is urgently required. A second aspect concerns the cultivation, aiming to lower the costs and/or enhance the quality or quantity of harvested biomass [ 12 , 13 , 17 ]. Indoor cultivation leads to a more controlled growth, conversely to outdoor microalgal cultivation strategy [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Microalgal Co-Cultivation Prospecting to Modulate Vitamin and Bioactive Compounds Production

et al. 2021

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Microalgal biotechnology is gaining importance. However, key issues in the pipeline from species selection towards large biomass production still require improvements to maximize the yield and lower the microalgal production costs. This study explores a co-cultivation strategy to improve the bioactive compounds richness of the harvested microalgal biomass. Based on their biotechnological potential, two diatoms (Skeletonema marinoi, Cyclotella cryptica) and one eustigmatophyte (Nannochloropsis oceanica) were grown alone or in combination. Concentrations of ten vitamins (A, B1, B2, B6, B12, C, D2, D3, E and H), carotenoids and polyphenols, together with total flavonoids, sterols, lipids, proteins and carbohydrates, were compared. Moreover, antioxidant capacity and chemopreventive potential in terms inhibiting four human tumor-derived and normal cell lines proliferation were evaluated. Co-cultivation can engender biomass with emergent properties regarding bioactivity or bioactive chemical profile, depending on the combined species. The high vitamin content of C. cryptica or N. oceanica further enhanced (until 10% more) when co-cultivated, explaining the two-fold increase of the antioxidant capacity of the combined C. cryptica and N. oceanica biomass. Differently, the chemopreventive activity was valuably enhanced when coupling the two diatoms C. cryptica and S. marinoi. The results obtained in this pilot study promote microalgal co-cultivation as a valuable strategy aiming to boost their application in eco-sustainable biotechnology.

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Practical strategies to improve harvestable biomass energy yield in microalgal culture: A review

Cited by 61 publications

References 138 publications

Utilization of Biomass to Ash: An Overview of the Potential Resources for Alternative Energy

Utilization of Biomass to Ash: An Overview of the Potential Resources for Alternative Energy

Review of Power Converter Impact of Electromagnetic Energy Harvesting Circuits and Devices for Autonomous Sensor Applications

Microalgal Co-Cultivation Prospecting to Modulate Vitamin and Bioactive Compounds Production

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