Acclimated green microalgae consortium to treat sewage in an alternative urban WWTP in a coastal area of Central Italy DOI Creative Commons

M.G. Chieti,

Alice Petrucciani, Luigi Mollo

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 945, P. 174056 - 174056

Published: June 18, 2024

This study exposed a microalgal consortium formed by Auxenochlorella protothecoides, Tetradesmus obliquus, and Chlamydomonas reinhardtii to six mixed wastewater media containing different proportions of primary (P) or secondary (S) effluents diluted in centrate (C). Algae could grow at concentrations up 50 %, showing no significant differences between effluents. After acclimation, microalgae cultivated 50%P-50%C 50%S-50%C grew rate similar that control cultures (0.59–0.66 d−1). These results suggest the acclimated both sewage streams modulating proportion species their metabolism. Acclimation also altered photosynthetic activity wastewater-grown samples compared control, probably due partial photoinhibition, changes composition, metabolic activity. No major were observed two with respect biochemical biomass yield, bioremediation capacity algae but grown effluent showed qualitatively higher exopolysaccharides (EPS) production than primary. Regarding remediation, WW proficient nutrient removal efficiencies (close 100 %); however, final pH value 11) would be controversial if system upscaled as it is over legal limit cause phosphorus precipitation, so CO2 addition required. The theoretical scale-up achieve water treatment costs 0.109 €·m−3, which was significantly lower typical activated sludge systems.

Language: Английский

Acclimated green microalgae consortium to treat sewage in an alternative urban WWTP in a coastal area of Central Italy DOI Creative Commons

M.G. Chieti,

Alice Petrucciani, Luigi Mollo

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 945, P. 174056 - 174056

Published: June 18, 2024

This study exposed a microalgal consortium formed by Auxenochlorella protothecoides, Tetradesmus obliquus, and Chlamydomonas reinhardtii to six mixed wastewater media containing different proportions of primary (P) or secondary (S) effluents diluted in centrate (C). Algae could grow at concentrations up 50 %, showing no significant differences between effluents. After acclimation, microalgae cultivated 50%P-50%C 50%S-50%C grew rate similar that control cultures (0.59–0.66 d−1). These results suggest the acclimated both sewage streams modulating proportion species their metabolism. Acclimation also altered photosynthetic activity wastewater-grown samples compared control, probably due partial photoinhibition, changes composition, metabolic activity. No major were observed two with respect biochemical biomass yield, bioremediation capacity algae but grown effluent showed qualitatively higher exopolysaccharides (EPS) production than primary. Regarding remediation, WW proficient nutrient removal efficiencies (close 100 %); however, final pH value 11) would be controversial if system upscaled as it is over legal limit cause phosphorus precipitation, so CO2 addition required. The theoretical scale-up achieve water treatment costs 0.109 €·m−3, which was significantly lower typical activated sludge systems.

Language: Английский

Citations

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