Nitrogen Removal from Landfill Leachate by Microalgae

被引:40
作者
Pereira, Sergio E. L. [1 ,2 ]
Goncalves, Ana L. [1 ]
Moreira, Francisca C. [2 ]
Silva, Tania F. C. V. [2 ]
Vilar, Vitor J. P. [2 ]
Pires, Jose C. M. [1 ]
机构
[1] Univ Porto, Fac Engn, Lab Engn Proc Ambiente & Energia LEPABE, Dept Engn Quim, P-4200465 Oporto, Portugal
[2] Univ Porto, Fac Engn, Dept Engn Quim, LSRE LCM, P-4200465 Oporto, Portugal
关键词
biomass production; Chlorella vulgaris; landfill leachate; microalgae; nutrient removal kinetics; wastewater treatment; DOMESTIC WASTE-WATER; NUTRIENT REMOVAL; INTEGRATED APPROACH; CHLORELLA-VULGARIS; BIOMASS PRODUCTION; LIPID PRODUCTION; BACTERIA CONSORTIUM; STRESS INDEXES; TOXIC POTENCY; SOLID-WASTE;
D O I
10.3390/ijms17111926
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Landfill 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.
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页数:14
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