Cultivation of Chlorella vulgaris and Arthrospira platensis with Recovered Phosphorus from Wastewater by Means of Zeolite Sorption

International Journal of Molecular Sciences

Giorgos Markou¹  Orily Depraetere²  Dries Vandamme²  Koenraad Muylaert² 

[1] Department of Natural Resources Management and Agricultural Engineering, Agricultural University of Athens, Iera Odos 75, Athens 11855, Greece;Laboratory Aquatic Biology, KU Leuven Kulak, E. Sabbelaan 53, Kortrijk 8500, Belgium; E-Mails:

关键词: biomass;    cyanobacteria;    microalgae;    nutrient recycling;    phosphorus;    wastewater treatment;    zeolite;   

DOI  :  10.3390/ijms16024250

来源: mdpi

【 摘 要 】

In this study, zeolite was employed for the separation and recovery of P from synthetic wastewater and its use as phosphorus (P) source for the cultivation of the green microalga Chlorella vulgaris and the cyanobacterium Arthrospira (Spirulina) platensis. At P-loaded zeolite concentration of 0.15–1 g/L, in which P was limited, the two species displayed quite different behavior regarding their growth and biomass composition. C. vulgaris preferred to increase the intracellular P and did not synthesize biomass, while A. platensis synthesized biomass keeping the intracellular P as low as possible. In addition under P limitation, C. vulgaris did display some little alteration of the biomass composition, while A. platensis did it significantly, accumulating carbohydrates around 70% from about 15%–20% (control). Both species could desorb P from zeolite biologically. A. platensis could recover over 65% and C. vulgaris 25% of the P bounded onto zeolite. When P-loaded zeolite concentration increased to 5 g/L, P was adequate to support growth for both species. Especially in the case of C. vulgaris, growth was stimulated from the presence of P-loaded zeolite and produced more biomass compared to the control.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.