Characterization of Seven Species of Cyanobacteria for High-Quality Biomass Production

Patel, Vikas; Sundaram, Shanthy; Patel, Akash; Kalra, Alok

doi:10.1007/s13369-017-2666-0

Cited by 52 publications

(26 citation statements)

References 42 publications

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“…It was shown that there is a linear relationship between cell count and OD at 684 nm for M. aeruginosa (R 2 > 0.99) [24,25]. A research carried out by Patel et al [26] also showed a linear relationship between cell count and OD 730 for five cyanobacteria species (R 2 > 0.99). Therefore, in this study, ODs at 684 nm and 730 nm were analyzed using a UV-Vis spectrophotometer (UV-1280, Shimadzu, Kyoto, Japan).…”

Section: Methodsmentioning

confidence: 94%

Comparison of Different Anode Materials to Remove Microcystis aeruginosa Cells Using Electro-Coagulation–Flotation Process at Low Current Inputs

Meetiyagoda

Fujino

2020

Water

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Cyanobacterial blooms are a threat to the drinking water supply owing to their potential toxicity. Microcystins which are the most widespread cyanotoxins, are mainly produced by Microcystis spp. In this study, we cultured Microcystis aeruginosa cells in BG-11 medium at 25 °C to investigate the efficiency of the electro-coagulation–flotation process to remove them. Different anode materials (Fe, Al, Cu, and Zn) along with a graphite cathode were compared separately in the 10–100 mA current range in a 0.025 M Na2SO4 electrolyte. Turbidity, optical density at 684 nm (OD684), OD730, Chl-a concentration, and DOC concentration were analyzed to clarify the mechanism by which M. aeruginosa cells are removed. The Al anode indicated the highest removal efficiencies in terms of turbidity (90%), OD684 and OD730 (98%), and Chl-a concentration (96%) within 30 min at 4.0 mA/cm2 current density and the lowest average electrode consumption of 0.120 ± 0.023 g/L. The energy consumption of the Al electrode was 0.80 Wh/L. From these results, we found that Al was the best among the anode materials evaluated to remove M. aeruginosa cells. However, further studies are required to optimize the Al anode in terms of pH, treatment time, electrode distance, and electrolyte concentration to enhance the removal of M. aeruginosa cells.

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Section: Methodsmentioning

confidence: 94%

Comparison of Different Anode Materials to Remove Microcystis aeruginosa Cells Using Electro-Coagulation–Flotation Process at Low Current Inputs

Meetiyagoda

Fujino

2020

Water

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“…Cyanobacteria also showed low values, whereas other authors obtained higher values. In spite of the low values, these organisms can produce high value fatty acids [ 50 ]. A possible cosmetic application of lipids in cosmetic products is the avoidance of skin dehydration [ 15 ].…”

Section: Discussionmentioning

confidence: 99%

Cyanobacteria and Red Macroalgae as Potential Sources of Antioxidants and UV Radiation-Absorbing Compounds for Cosmeceutical Applications

et al. 2020

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In recent years, research on natural products has gained considerable attention, particularly in the cosmetic industry, which is looking for new bio-active and biodegradable molecules. In this study, cosmetic properties of cyanobacteria and red macroalgae were analyzed. The extractions were conducted in different solvents (water, ethanol and two combinations of water:ethanol). The main molecules with antioxidant and photoprotective capacity were mycosporine-like amino acids (MAAs), scytonemin and phenolic compounds. The highest contents of scytonemin (only present in cyanobacteria) were observed in Scytonema sp. (BEA 1603B) and Lyngbya sp. (BEA 1328B). The highest concentrations of MAAs were found in the red macroalgae Porphyra umbilicalis, Gelidium corneum and Osmundea pinnatifida and in the cyanobacterium Lyngbya sp. Scytonema sp. was the unique species that presented an MAA with maximum absorption in the UV-B band, being identified as mycosporine-glutaminol for the first time in this species. The highest content of polyphenols was observed in Scytonema sp. and P. umbilicalis. Water was the best extraction solvent for MAAs and phenols, whereas scytonemin was better extracted in a less polar solvent such as ethanol:dH2O (4:1). Cyanobacterium extracts presented higher antioxidant activity than those of red macroalgae. Positive correlations of antioxidant activity with different molecules, especially polyphenols, biliproteins and MAAs, were observed. Hydroethanolic extracts of some species incorporated in creams showed an increase in the photoprotection capacity in comparison with the base cream. Extracts of these organisms could be used as natural photoprotectors improving the diversity of sunscreens. The combination of different extracts enriched in scytonemin and MAAs could be useful to design broad-band natural UV-screen cosmeceutical products.

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“…The produced biomass of 761 mg/L corresponds to the yields obtained in other studies for cyanobacteria grown on commercial freshwater medium. Patel et al [40] have reported biomass yields close to 1 g/L for Synechococcus and Phormidium species, but under a different light regime, higher starting N-concentration and with a combined NH 4 + /NO 3 − nutrient source. However, they observed lipid proportions that were significantly lower than those determined in our study.…”

Section: Discussionmentioning

confidence: 99%

“…Unicellular microalgae and cyanobacteria are quite often richer in lipids than filamentous species, known to produce large quantities of polysaccharides. Prokaryotes due to their small size, metabolic plasticity and resilience to rough environmental conditions are widely considered as good candidates for open-pond lipid production [40]. In addition to lipid total yield, the structure of the synthesized triglycerides is very important for biodiesel production.…”

Section: Discussionmentioning

confidence: 99%

Growth Aspects and Biochemical Composition of Synechococcus sp. MK568070 Cultured in Oil Refinery Wastewater

Blažina

Haberle

Hrustić

et al. 2019

JMSE

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The aim of the study was to explore the possibility of bioremediation of oil refinery wastewaters by the cyanobacterium Synechococcus sp. MK568070, isolated from the Adriatic Sea. The potential of biomass and lipid production was explored upon cultivation on oil refinery wastewater with excess CO2 after the removal of nutrients. The strain grew well in a wide range of salinities and ammonium concentrations, and was further tested on the wastewater from local oil refinery plant of various N-composition. Growth experiment under optimized conditions was used to analyze the lipid, carbohydrate and protein dynamics. The biomass yield was highly dependent on nutrient source and concentration, salinity and CO2 addition. Highest biomass yield was 767 mg/L of dry weight. Towards the end of the experiment the decline in carbohydrate to 18.9% is visible, whereas at the same point lipids, in particular saturated fatty acid methyl esters (FAME), started to accumulate within the cells. The content of lipids at the end of the experiment was 21.4%, with the unsaturation index 0.45 providing good biofuel feedstock characteristics. Fourier Transform Infrared (FTIR) spectroscopy analysis demonstrated a high degree of lipid accumulation in respect to proteins, along with the structural changes and biomass accumulation. In addition, the N-removal from the wastewater was >99% efficient. The potential of lipid accumulation, due to the functional photosynthesis even at the minimal cell quota of nutrients, is critical for the usage of excess industrial CO2 and its industrial transformation to biodiesel. These findings enable further considerations of Synechococcus sp. (MK568070) for the industrial scale biomass production and wastewater remediation.

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Characterization of Seven Species of Cyanobacteria for High-Quality Biomass Production

Cited by 52 publications

References 42 publications

Comparison of Different Anode Materials to Remove Microcystis aeruginosa Cells Using Electro-Coagulation–Flotation Process at Low Current Inputs

Comparison of Different Anode Materials to Remove Microcystis aeruginosa Cells Using Electro-Coagulation–Flotation Process at Low Current Inputs

Cyanobacteria and Red Macroalgae as Potential Sources of Antioxidants and UV Radiation-Absorbing Compounds for Cosmeceutical Applications

Growth Aspects and Biochemical Composition of Synechococcus sp. MK568070 Cultured in Oil Refinery Wastewater

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