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

@article{Vieira2012SimultaneousUO,
  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},
  year={2012},
  volume={7}
}
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… 
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TLDR
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
TLDR
The protein and lipid contents of dry biomass collected at the end of cultivations were shown to decrease with increasing light intensity, and the cell productivity was a decreasing function of the ammonium chloride feeding time and a quadratic function ofThe light intensity.
Kinetics and bioenergetics of Spirulina platensis cultivation by fed-batch addition of urea as nitrogen source
TLDR
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.
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TLDR
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
TLDR
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.
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TLDR
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