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Digestion of settleable solids from recirculating fish tank as nutrients source for the microalga Scenedesmus sp. cultivation
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  • Journal title : Environmental Engineering Research
  • Volume 20, Issue 4,  2015, pp.377-382
  • Publisher : Korean Society of Environmental Engineering
  • DOI : 10.4491/eer.2015.089
 Title & Authors
Digestion of settleable solids from recirculating fish tank as nutrients source for the microalga Scenedesmus sp. cultivation
Rotthong, Maneechotiros; Chiemchaisri, Wilai; Tapaneeyaworawong, Paveena; Powtongsook, Sorawit;
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The high concentration of nitrogen and phosphorus in wastewater incorporated with the ability to use carbon dioxide as the carbon source make the microalgae become more attractive in wastewater treatment process. This study evaluates the optimal conditions for the digestion of settelable solids from the recirculating aquaculture system to produce the biomass of the green microalga Scenedesmus sp. After solids separation, aerobic digestion of settleable solids under disperse condition produced nitrate as the final product of consequently ammonification and nitrification processes. With the optimal digestion procedure, nitrate concentration during aerobic digestion in 2000 mL vessel increased from to in 10 days. Thereafter, cultivation of Scenedesmus sp. was performed in 1000 mL Duran bottle with air bubbling. The highest Scenedesmus sp. specific growth rate of was obtained in treatment using liquid fraction after aerobic digestion as the whole culture medium for Scenedesmus sp. cultivation. With this study, digestion of of settleable solids from fish pond finally produced of Scenedesmus sp. biomass.
Aerobic digestion;Ammonification;Nitrification;Recirculating aquaculture system;Scenedesmus sp.;Settleable solids;
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