Pharmaceuticals removal and nutrient recovery from wastewaters by Chlamydomonas acidophila

Ania Escudero*, Colin Hunter, Joanne Roberts, Karin Helwig, Ole Pahl

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Wastewater treatment plants are a major source of human pharmaceutical residues (PR) in the aquatic environment, which are considered to be of emerging concern. The microalga Chlamydomonas acidophila has shown to be a promising technology to recover the nutrients from wastewater and therefore, the aim of this study was to evaluate the ability of this species to also remove PRs commonly present in wastewaters (atenolol, caffeine, carbamazepine, clarithromycin, erythromycin, lidocaine, propranolol and simvastatin). Batch assays were carried out (50 mL, 90 rpm, 43 μmol photons m-2 s -1, 22 °C) comprising the wastewater with the pharmaceutical mixture at three concentrations: CHigh, CModerate and CEnv. The results demonstrated that this microalga does not seem to be affected by pharmaceuticals in wastewater at concentrations well above those detected in urban effluents; additionally it is able to degrade the antibiotics erythromycin and clarithromycin better than other microalgae species and enhances their removal from wastewater by 93 - 65% and 64 - 50% respectively. Furthermore, it exhibited a high assimilation of ammonium and phosphates reaching values of around 9 mgNH4 L-1d-1 and 3 mgPO4 L-1d-1 compared to other species. Therefore, Chlamydomonas acidophila appears to be a promising agent for urban wastewater treatment.

Original languageEnglish
Article number107517
JournalBiochemical Engineering Journal
Volume156
Early online date24 Jan 2020
DOIs
Publication statusE-pub ahead of print - 24 Jan 2020

Fingerprint

drug
wastewater
nutrient
microalga
antibiotics
aquatic environment
ammonium
phosphate
removal
assay
effluent

Keywords

  • microalgae
  • antibiotics
  • urban wastewaters
  • biological treatment
  • nutrients recovery

Cite this

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title = "Pharmaceuticals removal and nutrient recovery from wastewaters by Chlamydomonas acidophila",
abstract = "Wastewater treatment plants are a major source of human pharmaceutical residues (PR) in the aquatic environment, which are considered to be of emerging concern. The microalga Chlamydomonas acidophila has shown to be a promising technology to recover the nutrients from wastewater and therefore, the aim of this study was to evaluate the ability of this species to also remove PRs commonly present in wastewaters (atenolol, caffeine, carbamazepine, clarithromycin, erythromycin, lidocaine, propranolol and simvastatin). Batch assays were carried out (50 mL, 90 rpm, 43 μmol photons m-2 s -1, 22 °C) comprising the wastewater with the pharmaceutical mixture at three concentrations: CHigh, CModerate and CEnv. The results demonstrated that this microalga does not seem to be affected by pharmaceuticals in wastewater at concentrations well above those detected in urban effluents; additionally it is able to degrade the antibiotics erythromycin and clarithromycin better than other microalgae species and enhances their removal from wastewater by 93 - 65{\%} and 64 - 50{\%} respectively. Furthermore, it exhibited a high assimilation of ammonium and phosphates reaching values of around 9 mgNH4 L-1d-1 and 3 mgPO4 L-1d-1 compared to other species. Therefore, Chlamydomonas acidophila appears to be a promising agent for urban wastewater treatment.",
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author = "Ania Escudero and Colin Hunter and Joanne Roberts and Karin Helwig and Ole Pahl",
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Pharmaceuticals removal and nutrient recovery from wastewaters by Chlamydomonas acidophila. / Escudero, Ania; Hunter, Colin; Roberts, Joanne; Helwig, Karin; Pahl, Ole.

In: Biochemical Engineering Journal , Vol. 156, 107517, 15.04.2020.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Pharmaceuticals removal and nutrient recovery from wastewaters by Chlamydomonas acidophila

AU - Escudero, Ania

AU - Hunter, Colin

AU - Roberts, Joanne

AU - Helwig, Karin

AU - Pahl, Ole

N1 - *1-1-50* Acceptance in SAN/ from webpage AAM: 12m embargo - embargo currently set with no end date, as only journal pre-proof online 24 January 2020. 29/1/20 DC

PY - 2020/1/24

Y1 - 2020/1/24

N2 - Wastewater treatment plants are a major source of human pharmaceutical residues (PR) in the aquatic environment, which are considered to be of emerging concern. The microalga Chlamydomonas acidophila has shown to be a promising technology to recover the nutrients from wastewater and therefore, the aim of this study was to evaluate the ability of this species to also remove PRs commonly present in wastewaters (atenolol, caffeine, carbamazepine, clarithromycin, erythromycin, lidocaine, propranolol and simvastatin). Batch assays were carried out (50 mL, 90 rpm, 43 μmol photons m-2 s -1, 22 °C) comprising the wastewater with the pharmaceutical mixture at three concentrations: CHigh, CModerate and CEnv. The results demonstrated that this microalga does not seem to be affected by pharmaceuticals in wastewater at concentrations well above those detected in urban effluents; additionally it is able to degrade the antibiotics erythromycin and clarithromycin better than other microalgae species and enhances their removal from wastewater by 93 - 65% and 64 - 50% respectively. Furthermore, it exhibited a high assimilation of ammonium and phosphates reaching values of around 9 mgNH4 L-1d-1 and 3 mgPO4 L-1d-1 compared to other species. Therefore, Chlamydomonas acidophila appears to be a promising agent for urban wastewater treatment.

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