Bioactivity assessment, micropollutant and nutrient removal ability of Tetradesmus obliquus cultivated outdoors in centrate from urban wastewater

0565822 - MBÚ 2023 RIV US eng J - Journal Article
Grivalský, Tomáš - Ranglová, Karolína - Lakatos, Gergely Erno - Manoel, Joao Camara - Černá, Tereza - Barcelo-Villalobos, M. - Suarez Estrella, F. - Ördög, V. - Masojídek, Jiří
Bioactivity assessment, micropollutant and nutrient removal ability of Tetradesmus obliquus cultivated outdoors in centrate from urban wastewater.
Journal of Applied Phycology. Roč. 34, September 3 (2022), s. 2955-2970. ISSN 0921-8971. E-ISSN 1573-5176
R&D Projects: GA MŠMT(CZ) EF19_074/0014484
EU Projects: European Commission(XE) 727874 - SABANA; European Commission(CZ) ATCZ 260
Institutional support: RVO:61388971
Keywords : Wastewater * Tetradesmus * Thin-layer cultivation unit * Bioactivity * Remediation
OECD category: Microbiology
Impact factor: 3.3, year: 2022
Method of publishing: Limited access
https://link.springer.com/article/10.1007/s10811-022-02828-6

Nutrient and micropollutant removal, and bioactivity were studied in cultures of the green microalga Tetradesmus obliquus MACC-677 grown in centrate from municipal wastewater (WW). Two outdoor units, a thin-layer cascade (TLC) and a thin-layer raceway pond (TL-RWP), were tested for microalgal culturing in batch and semi-continuous regimes where their photosynthetic performance was monitored. The results revealed that the T. obliquus cultures grew well, showing a high specific growth rate mu of 0.31 day(-1) and 0.25 day(-1) when grown in WW in TLC and TL-RWP, respectively. The cultivation trials showed high nutrient removal efficiency for ammonium nitrogen (98.5%) as well as orthophosphate (89%), the most abundant forms of N and P occurring in municipal WW. The removal of selected pharmaceuticals and endocrine disruptors (e.g., ibuprofen, amitriptyline, bisphenol A, etc.) was also assessed. Ibuprofen was the most abundant micropollutant detected in the centrate, with concentrations up to 5000 ng L-1 and fast removal during the cultivation. The biomass produced in the centrate revealed antimicrobial activity against plant pathogens, including fungi, oomycota, and bacteria. These findings have shown that the culturing of T. obliquus can be considered a suitable way to contribute to a circular economy, to remove nutrients and micropollutants from municipal WW from which biomass extracts can be further used for plant protection in agriculture.
Permanent Link: https://hdl.handle.net/11104/0337314