Increasing Phosphorus Uptake Efficiency by Phosphorus-Starved Microalgae for Municipal Wastewater Post-TreatmentShow others and affiliations
2021 (English)In: Microorganisms, E-ISSN 2076-2607, Vol. 9, no 8, article id 1598Article in journal (Refereed) Published
Abstract [en]
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 phosphatase 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.
Place, publisher, year, edition, pages
MDPI, 2021. Vol. 9, no 8, article id 1598
Keywords [en]
microalgae, phosphorus starvation, municipal wastewater, nutrient removal, polyphosphate, alkaline phosphatase activity
National Category
Water Treatment
Identifiers
URN: urn:nbn:se:ltu:diva-86942DOI: 10.3390/microorganisms9081598ISI: 000689466700001PubMedID: 34442678Scopus ID: 2-s2.0-85111109778OAI: oai:DiVA.org:ltu-86942DiVA, id: diva2:1589694
Note
Godkänd;2021;Nivå 0;2021-08-31 (alebob);
Forskningsfinansiär: Latvian Council of Science (LZP-2019/1-0271)
2021-08-312021-08-312021-09-09Bibliographically approved