Simultaneous use of urea and potassium nitrate for Arthrospira (Spirulina) platensis cultivation

  title={Simultaneous use of urea and potassium nitrate for Arthrospira (Spirulina) platensis cultivation},
  author={Denise Mesquita Vieira and Marcelo Chuei Matsudo and Sunao Sato and Attilio Converti and Jo{\~a}o Carlos Monteiro de Carvalho},
  journal={Biotechnology Journal},
Urea has been considered as a promising alternative nitrogen source for the cultivation of Arthrospira platensis if it is possible to avoid ammonia toxicity; however, this procedure can lead to periods of nitrogen shortage. This study shows that the addition of potassium nitrate, which acts as a nitrogen reservoir, to cultivations carried out with urea in a fed‐batch process can increase the maximum cell concentration (Xm) and also cell productivity (PX). Using response surface methodology, the… 
Use of acetate in fed-batch mixotrophic cultivation of Arthrospira platensis
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Simultaneous use of sodium nitrate and urea as nitrogen sources improves biomass composition of Arthrospira platensis cultivated in a tubular photobioreactor
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Arthrospira (Spirulina) platensis (Nordstedt) Gomont was cultivated under light‐limited conditions in 5‐L open tanks by daily supplying NH4Cl as nitrogen source by evaluating three‐factor, five‐level, central composite experimental planning and the response surface methodology.
Influence of ammonium chloride feeding time and light intensity on the cultivation of Spirulina (Arthrospira) platensis
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Comparison of the yield of growth on Gibbs energy obtained using either urea or KNO3 pointed to the preference of S. platensis for the former nitrogen source, likely owing to more favorable bioenergetic conditions.
Influence of pH, temperature, and urea molar flowrate on Arthrospira platensis fed‐batch cultivation: A kinetic and thermodynamic approach
A central composite factorial design combined to response surface methodology (RSM) was utilized to determine the relationship between the selected response variables and codified values of the independent variables (pH, temperature, T, and urea flowrate, K).
CO2 from alcoholic fermentation for continuous cultivation of Arthrospira (Spirulina) platensis in tubular photobioreactor using urea as nitrogen source
It is demonstrated that the use of such cost free CO2 from alcoholic fermentation as carbon source, associated with low cost nitrogen source, may be a promising way to reduce costs of continuous cultivation of photosynthetic microorganisms, contributing at the same time to mitigate the greenhouse effect.
Effect of nitrogen‐mediated changes in alkalinity on pH control and CO2 supply in intensive microalgal cultures
The results demonstrate that the choice of N is a critical factor in controlling the pH of large‐scale algal cultures and Urea is, by far, the most suitable N source for maximizing algal yield when it is supplied in combination with the proper amounts of HCO  3− alkalinity in the growth medium and percent CO2 in the bubbled gas that will lead to an equilibrium pH near the optimum pH.