Nitrogen Removal from Landfill Leachate by Microalgae
AbstractLandfill leachates result from the degradation of solid residues in sanitary landfills, thus presenting a high variability in terms of composition. Normally, these effluents are characterized by high ammoniacal-nitrogen (N–NH4+) concentrations, high chemical oxygen demands and low phosphorus concentrations. The development of effective treatment strategies becomes difficult, posing a serious problem to the environment. Phycoremediation appears to be a suitable alternative for the treatment of landfill leachates. In this study, the potential of Chlorella vulgaris for biomass production and nutrients (mainly nitrogen and phosphorus) removal from different compositions of a landfill leachate was evaluated. Since microalgae also require phosphorus for their growth, different loads of this nutrient were evaluated, giving the following N:P ratios: 12:1, 23:1 and 35:1. The results have shown that C. vulgaris was able to grow in the different leachate compositions assessed. However, microalgal growth was higher in the cultures presenting the lowest N–NH4+ concentration. In terms of nutrients uptake, an effective removal of N–NH4+ and phosphorus was observed in all the experiments, especially in those supplied with phosphorus. Nevertheless, N–NO3− removal was considered almost negligible. These promising results constitute important findings in the development of a bioremediation technology for the treatment of landfill leachates. View Full-Text
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Pereira, S.F.L.; Gonçalves, A.L.; Moreira, F.C.; Silva, T.F.C.V.; Vilar, V.J.P.; Pires, J.C.M. Nitrogen Removal from Landfill Leachate by Microalgae. Int. J. Mol. Sci. 2016, 17, 1926.
Pereira SFL, Gonçalves AL, Moreira FC, Silva TFCV, Vilar VJP, Pires JCM. Nitrogen Removal from Landfill Leachate by Microalgae. International Journal of Molecular Sciences. 2016; 17(11):1926.Chicago/Turabian Style
Pereira, Sérgio F.L.; Gonçalves, Ana L.; Moreira, Francisca C.; Silva, Tânia F.C.V.; Vilar, Vítor J.P.; Pires, José C.M. 2016. "Nitrogen Removal from Landfill Leachate by Microalgae." Int. J. Mol. Sci. 17, no. 11: 1926.
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