Online ISSN: 2515-8260

Keywords : Biomass


AN ANALYTICAL STUDY ON GENETIC VARIABILITY AND HYDROGEN (H2) PRODUCTION FROM CYANOBACTERIA

Mr. Altaf Hussain Rather, Dr. Alok Kumar Srivastav

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 9, Pages 3723-3735

This research paper entitles the research work regarding bio-hydrogen generation from a renewable source, namely biomass; such as a group of photosynthetic microorganisms cyanobacteria. Molecular hydrogen is widely regarded as the energy carrier of the future. It can be used in fuel cells, generating an electric current. Biohydrogen production has several advantages when compared to photoelectrochemical or thermo-chemical processes due to the low energy requirement and  investment cost. Cyanobacteria has an inherent ability to produce molecular hydrogen via the enzyme complex nitrogenase. This hydrogen is not released, however but is recaptured by the bacteria using an uptake hydrogenase. The study also foretells about optimization of the various key parameters that enhance hydrogen production. This knowledge can be used to evaluate the possibilities for producing hydrogen and high value products efficiently in the same process.

Biomass production evaluation of a consortium with prevalence of Anabaena sp. in fed-batch cultures with three intensities of irradiance, three levels of nitrate and pilot scaling-up.

David Francisco Dávila Ortega; Mayra Cathme Romero

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 2, Pages 4780-4788

Some cyanobacteria of the genus Anabaena produce compounds of commercial interest. This study reports the effect of the concentration of nutrients in function of sodium nitrate and ammonium nitrate at 0, 2, and 4 mM; and the irradiance at 39, 117 and 234 mol m-2 s-1 over time, on the production of biomass (measured with various methods) from a consortium of microalgae and cyanobacteria with predominant Anabaena sp. in fed batch cultures. Those were scaled up to 10 L and their biomass harvested, dried and chemically analyzed. The growth and biochemical composition of the consortium was influenced by the combination of the above factors, with statistical significance (p<0.05). The best production of pigments and biomass was generated on the combination of factors: nitrate concentration (2 mM) and Irradiance (234 mol m-2 s-1 or 12 klux). A notorious increase in the amount of biomass was produced using ammonium nitrate as a nitrogen source. The biochemical composition of the harvested biomass determined potential applications in the food and pharma industries as well as biofertilizer and soil conditioner.