Increasing Phosphorus Uptake Efficiency by Phosphorus-Starved Microalgae for Municipal Wastewater Post-Treatment
Microorganisms 2021
Aigars Lavrinovičs, Frederika Murby, Elīna Jakubauska, Linda Mežule, Tālis Juhna

Four microalgal species, Chlorella vulgaris, Botryococcus braunii, Ankistrodesmus falcatus, and Tetradesmus obliquus were studied for enhanced phosphorus removal from municipal wastewater after their exposure to phosphorus starvation. Microalgae were exposed to phosphorus starvation conditions for three and five days and then used in a batch experiment to purify an effluent from a small WWTP. After 3‐day P‐starvation, C. vulgaris biomass growth rate increased by 50% and its PO4 removal rate reached >99% within 7 days. B. braunii maintained good biomass growth rate and nutrient removal regardless of the P‐starvation. All species showed 2–5 times higher alkaline phos-phatase activity increase for P‐starved biomass than at the reference conditions, responding to the decline of PO4 concentration in wastewater and biomass poly‐P content. The overall efficiency of biomass P‐starvation on enhanced phosphorus uptake was found to be dependent on the species, N/P molar ratio in the wastewater, as well as the biomass P content. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.


Atslēgas vārdi
Alkaline phosphatase activity; Microalgae; Municipal wastewater; Nutrient removal; Phosphorus starvation; Polyphosphate
DOI
10.3390/microorganisms9081598
Hipersaite
https://www.mdpi.com/2076-2607/9/8/1598

Lavrinovičs, A., Murby, F., Jakubauska, E., Mežule, L., Juhna, T. Increasing Phosphorus Uptake Efficiency by Phosphorus-Starved Microalgae for Municipal Wastewater Post-Treatment. Microorganisms, 2021, Vol. 9, No. 8, Article number 1598. e-ISSN 2076-2607. Pieejams: doi:10.3390/microorganisms9081598

Publikācijas valoda
English (en)
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