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Effects of Nutrient Content and Nitrogen to Phosphorous Ratio on the Growth, Nutrient Removal and Desalination Properties of the Green Alga Coelastrum morus on a Laboratory Scale
| Content Provider | MDPI |
|---|---|
| Author | Kamilla, Márton Vikt, ória B-Béres Istv, án Bácsi Figler, Aida |
| Copyright Year | 2021 |
| Description | In wastewater, nutrient concentrations and salinity vary substantially, however, the optimal N:P ratio for the treatment using microalgae is not well described. In this study, the effects of higher and lower nitrate and phosphate contents and N:P ratios on growth, nutrient removal ability and halotolerance of the common green alga Coelastrum morus were investigated in model solutions. The results suggest that high nitrate content (above 100 mg L−1) with a similarly high phosphate concentration (resulting low N:P ratio) is not favorable for growth. The studied isolate can be considered as a halotolerant species, showing remarkable growth up to 1000 mg L−1 NaCl and it seems that despite the negative effects on growth, higher nutrient content contributes to higher halotolerance. A significant amount of nitrate removal was observed in media with different nutrient contents and N:P ratios with different salt concentrations. High N:P ratios favor phosphate removal, which is more inhibited by increasing NaCl concentration than nitrate uptake. Overall, with a relatively higher nutrient content and a favorable (5 or higher) N:P ratio, a common green algal species such as C. morus could be a promising candidate next to species from the Chlorellaceae and Scenedesmaceae families. |
| Starting Page | 2112 |
| e-ISSN | 19961073 |
| DOI | 10.3390/en14082112 |
| Journal | Energies |
| Issue Number | 8 |
| Volume Number | 14 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-04-09 |
| Access Restriction | Open |
| Subject Keyword | Energies Water Science and Technology Green Alga Nutrient Content N:p Ratio Salt Tolerance Nutrient Removal Salt Content Reduction |
| Content Type | Text |
| Resource Type | Article |
