Nutrients and pharmaceuticals removal from wastewater by culture and harvesting of Chlorella sorokiniana

Bioresource Technology
C EscapaM Otero

Abstract

This work aimed to study both the removal of nutrients and pharmaceuticals, namely salicylic acid or paracetamol, from water by the culture of Chlorella sorokiniana. The removal of nutrients was nearly complete at the end of the batch culture; above 70% for nitrates and 89% for phosphates in the semicontinuous culture. The pharmaceuticals removal kinetics were 2.3 times greater for the salicylic acid than paracetamol, reaching volumetric efficiencies above 93% for salicylic acid in the semicontinuous culture. Finally, to separate the microalgae biomass from treated water, metal salts, synthetic polyelectrolytes and a biopolymer were tested as coagulants-flocculants. The best flocculation results were achieved with AlCl3 (95.23% with 200mgg(-1), 1min incubation time). However, given that resulting flocs had different characteristics, flocculants must be chosen on the basis of the subsequent use of the biomass.

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Citations

Mar 11, 2016·Applied Biochemistry and Biotechnology·Ergin Taşkan
Jul 17, 2016·Journal of Environmental Management·C EscapaM Otero
May 30, 2020·International Journal of Environmental Research and Public Health·Andreia SilvaMarta Otero
Jul 19, 2020·Bioprocess and Biosystems Engineering·Aline ViancelliHelen Treichel
Mar 28, 2017·Journal of Applied Phycology·Francesco G Gentili, Jerker Fick
Aug 14, 2020·Biology·Deepak SethiSeetharaman Vaidyanathan
Sep 7, 2020·The Science of the Total Environment·Leen LabeeuwPeter J Ralph
Feb 13, 2021·The Science of the Total Environment·Alan RempelLuciane Maria Colla
Nov 20, 2021·Environmental Science and Pollution Research International·Komargoud PrakruthiHarikaranahalli Puttaiah Shivaraju

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