Application of photorespirometry to unravel algal kinetic parameters of nitrogen consumption in complex media

摘要: Abstract Photorespirometry is a quick method to assess the effect of several variables on algal growth performances in complex media such as wastewater. In this work, respirometry was applied derive kinetic parameters nitrogen exploitation. Oxygen production found be related internal quota, suggesting that Droop model more appropriate describe these systems. The protocol optimized minimize N quota biomass used for respirometric tests, so half-saturation constant nutrient uptake could simply derived. This parameter resulted similar (about 14 mgN L−1) different species (nitrate, ammonium, peptone and urea). maximum rate cannot measured with due stoichiometry species, affects yield oxygen production, but through batch experiments. preference microalgae between nitrate ammonium ascertained both continuous reactors. system, partially removed even when present, possible result acclimation phenomena. Finally, mass balances were systems value minimum comparable or supplied.