Sustainable Solution for Future Energy Challenges Through Microbes

Sahni, Sumit; Singh, Manoj Kumar; Narang, Anita

doi:10.1002/9781119741503.ch13

Cited by 3 publications

(1 citation statement)

References 44 publications

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“…The energy stored in various biomass resources through photosynthesis could be harnessed by converting them into biofuels (Sahni et al, 2021). The carbon released to the atmosphere from the combustion of biofuels is biogenic, i.e., the carbon fixed by plants/microalgae while growing; hence, it has zero greenhouse gas impact on the atmosphere (Struthers, 2021).…”

Section: Introductionmentioning

confidence: 99%

Microalgae growth and diversity in anaerobic digestate compared to synthetic media

Ermiş

Guven-Gulhan²,

Çakır

et al. 2022

Biofuel Res. J.

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Economizing microalgal cultivation is a considerable milestone targeted by efforts put into microalgal biorefineries. In light of that, the present study was aimed to explore the potential of using anaerobic liquid digestate (ALD) as culture media to grow microalgae and compared it with three different synthetic media (i.e., N8, BBM, and M8) in terms of biomass yield, fatty acid composition, and nutrient utilization/recovery. Moreover, a mixed culture of wild-type microalgae was employed in this study owing to the ability of mixed cultures to survive extreme conditions, eliminating the risk of losing the culture easily, as it mostly happens with pure cultures. The highest nutrient yield coefficients were achieved when the mixed microalgae culture was cultivated in ALD, where the yield coefficient for nitrogen (YN) and yield coefficient for phosphorus (YP) were 10.7 mg biomass mg-1 N and 98 mg biomass mg-1 P, respectively. The highest lipid content (34%) and the highest concentrations of C16:0 (114 mg L-1) and C18:0 (60.9 mg L-1) were also recorded when the mixed microalgae culture was cultivated in ALD. Furthermore, the polyunsaturated fatty acids (PUFA) content also increased significantly in ALD, a beneficial phenomenon as PUFAs in microalgae allow them to adapt more effectively to extreme conditions. Based on the microbial community analysis performed using the multi-marker metabarcoding approach, Diphylleia rotans, Synechocystis PCC-6803, Cyanobium gracile PCC 6307, and Chlorella sorokiniana were identified as the most abundant species in the ALD growth. Overall, based on the findings of the present study, ALD could be used as a promising cultivation medium for microalgae, offering a process integration approach to combine anaerobic digestion and algae cultivation as an effective way to simultaneously treat the high-strength dark-colored ALD and valorize it into profitable byproducts.

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Section: Introductionmentioning

confidence: 99%

Microalgae growth and diversity in anaerobic digestate compared to synthetic media

Ermiş

Guven-Gulhan²,

Çakır

et al. 2022

Biofuel Res. J.

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Physiological Mechanisms Behind the Microbe-Induced Biofuel Production

Awasthi,

Qurishi,

Sharma

et al. 2024

Environmental Science and Engineering

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Microorganisms as New Sources of Energy

Talapko

Matić

et al. 2022

Energies

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The use of fossil energy sources has a negative impact on the economic and socio-political stability of specific regions and countries, causing environmental changes due to the emission of greenhouse gases. Moreover, the stocks of mineral energy are limited, causing the demand for new types and forms of energy. Biomass is a renewable energy source and represents an alternative to fossil energy sources. Microorganisms produce energy from the substrate and biomass, i.e., from substances in the microenvironment, to maintain their metabolism and life. However, specialized microorganisms also produce specific metabolites under almost abiotic circumstances that often do not have the immediate task of sustaining their own lives. This paper presents the action of biogenic and biogenic–thermogenic microorganisms, which produce methane, alcohols, lipids, triglycerides, and hydrogen, thus often creating renewable energy from waste biomass. Furthermore, some microorganisms acquire new or improved properties through genetic interventions for producing significant amounts of energy. In this way, they clean the environment and can consume greenhouse gases. Particularly suitable are blue-green algae or cyanobacteria but also some otherwise pathogenic microorganisms (E. coli, Klebsiella, and others), as well as many other specialized microorganisms that show an incredible ability to adapt. Microorganisms can change the current paradigm, energy–environment, and open up countless opportunities for producing new energy sources, especially hydrogen, which is an ideal energy source for all systems (biological, physical, technological). Developing such energy production technologies can significantly change the already achieved critical level of greenhouse gases that significantly affect the climate.

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Sustainable Solution for Future Energy Challenges Through Microbes

Cited by 3 publications

References 44 publications

Microalgae growth and diversity in anaerobic digestate compared to synthetic media

Microalgae growth and diversity in anaerobic digestate compared to synthetic media

Physiological Mechanisms Behind the Microbe-Induced Biofuel Production

Microorganisms as New Sources of Energy

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