Biomass production and nutrient removal in semicontinuous cultures of Scenedesmus sp. (Chlorophyceae) in artificial wastewater, under a simulated day-night cycle
Voltolina, D; Gomez-Villa, H; Correa, G
| HERO ID | 4522805 |
|---|---|
| In Press | No |
| Year | 2004 |
| Title | Biomass production and nutrient removal in semicontinuous cultures of Scenedesmus sp. (Chlorophyceae) in artificial wastewater, under a simulated day-night cycle |
| Authors | Voltolina, D; Gomez-Villa, H; Correa, G |
| Journal | Vie et Milieu |
| Volume | 54 |
| Issue | 1 (Mar 2004) |
| Page Numbers | 21-25 |
| Abstract | The possibility of short-term nutrient removal from wastewater with microalgae was evaluated with semicontinuous cultures of Scenedesmus sp. in artificial wastewater, with 30, 40 and 50% renewal of the medium every 24 h and a simulated day-night cycle. Organic biomass production ranged from 33.8 to 39.5 mg times l super(-1), with protein contents of 52-54%. Nitrate removal was high (69 to 79%), but the initial concentration of ammonia decreased only by 8 to 13%. The total inorganic nitrogen removed in 24 h varied from 17 to 22%, and 42 to 44% of the amount removed was recycled into new organic biomass. The concentration of phosphorus decreased by between 29 and 43%, with an estimated efficiency of recycling of 35 to 45%. As with nitrogen, removal was related to the availability of light, which favours active uptake and causes photosynthesis - related changes in water chemistry due to the high pH of the medium, with fast ammonia stripping and phosphate precipitation. Given that in outdoor cultures light is discontinuous, short-term nutrient removal does not seem feasible with the solar technology available for tertiary biological treatment. |
| Wosid | WOS:000221604000004 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | Culture; Ammonia; Nutrients; Precipitation; Recycling; Waste water; Biomass; pH effects; Wastewater treatment; Primary production; Nitrogen; Scenedesmus; Phosphates; Photosynthesis; Nutrient Removal; Cultures; Wastewater; Chlorophyceae |