Mechanisms of pharmaceutical and personal care product removal in algae-based wastewater treatment systems

Larsen, C.; Yu, Zutao; Flick, Robert; Passeport, Elodie

doi:10.1016/j.scitotenv.2019.133772

Cited by 59 publications

(22 citation statements)

References 62 publications

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“…Studies carried out in microalgal‐based wastewater treatments reported the formation of carboxy‐ibuprofen and hydroxyl‐ibuprofen, two major degradation products of IBU. This indicates that aerobic biodegradation is the main removal mechanism in microalgae reactors, particularly as an extracellular degradation due to the releasing organic exudates 38,42 …”

Section: Resultsmentioning

confidence: 99%

“…This indicates that aerobic biodegradation is the main removal mechanism in microalgae reactors, particularly as an extracellular degradation due to the releasing organic exudates. 38,42 Direct photolysis (negative controls) was the least significant mechanism in the removal of IBU and DFC, with maximum efficiencies of 15.1% for IBU C1 and 7.2% for DFC C1 at 12 h. This has been indicated as one of the removal mechanisms of DFC that forms less toxic hydrophilic products. 43,44 However, the low removal obtained in this study could be related to the presence of nitrogen compounds such as NO 3 − ions, which compete with DFC for available photons, resulting in a decrease in energy necessary for the breakdown of these molecules.…”

Section: Pharmaceutical Compounds Removalmentioning

confidence: 98%

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Cell growth and removal capacity of ibuprofen and diclofenac by Parachlorella kessleri at bench scale

Jiménez-Bambague

Florez-Castillo

Gómez-Angulo

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND The presence of pharmaceutical compounds has been studied in several countries in Latin America, and many xenobiotic compounds have been identified in wastewater, surface water and even drinking water, including ibuprofen and diclofenac. Microalgal‐based systems have been identified as a good alternative for removing these micropollutants, particularly under tropical conditions, and they are associated with low operational cost and high removal efficiency. Although studies for removing pharmaceutical compounds with Parachlorella kessleri are scarce, this microalga has demonstrated good performance in the treatment of wastewater. RESULTS Using doses of ibuprofen of 1000 and 16 000 μg L−1 and of diclofenac of 100 and 500 μg L−1, the removal efficiency of P. kessleri was evaluated under controlled conditions for periods of 12, 48 and 96 h during cell growth. A hormesis process was identified after an alarm phase at the first 12 h and a recovery at 48 h for ibuprofen, because the diclofenac curve achieved an early death phase, which was associated with oxidative damage. Total removal of up to 51.3% and 55.7% was obtained for ibuprofen and diclofenac, respectively. These removal efficiencies were mostly influenced by microalgae by the process of bioaccumulation/adsorption (23.3% for ibuprofen and 37.1% for diclofenac) and by other mechanisms (40.6% for ibuprofen and 44% for diclofenac). CONCLUSION Removal efficiencies were mainly associated with the presence of microalgae and removal mechanisms such as bioaccumulation and biodegradation for diclofenac, and biodegradation for ibuprofen. © 2021 Society of Chemical Industry (SCI).

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Section: Resultsmentioning

confidence: 99%

Section: Pharmaceutical Compounds Removalmentioning

confidence: 98%

Cell growth and removal capacity of ibuprofen and diclofenac by Parachlorella kessleri at bench scale

Jiménez-Bambague

Florez-Castillo

Gómez-Angulo

et al. 2021

J of Chemical Tech & Biotech

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“…Contrary to diclofenac, ibuprofen is highly biodegradable. A recent experiment performed at laboratory scale, using effluent water from a stabilization pond, demonstrated that, regardless the presence or absence of light, the concentration of ibuprofen remained the same when microalgae were not present (Larsen et al, 2019). On the contrary, when inoculating the system with a pure culture of Scenedesmus obliquus, the removal of ibuprofen reached almost a 90%.…”

Section: Pharmaceuticalsmentioning

confidence: 99%

Can high rate algal ponds be used as post-treatment of UASB reactors to remove micropollutants?

et al. 2020

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“…Nevertheless, other microalgae cultures such as Chlorella vulgaris and Scenedesmus obliquus from lagoon water demonstrated higher removal efficiencies with ibuprofen removals of ca. 60% [61] or almost complete removal using C. sorokiniana (99%) from anaerobically treated black water and synthetic urine [62] or a mixed microalgae culture taken from a real lake (98.5%) [60]. Here, the lower efficiency of the microalgae in terms of PhACs removal is in contrast with the microalgae growth (from 0.1 to 0.65 gL -1 of VS) and COD removal (43%) in this study.…”

Section: Performance Of Biological Cultures For Removal Of Phacsmentioning

confidence: 58%

Assessment of Trametes versicolor, Isochrysis galbana, and Purple Phototrophic Bacteria for the Removal of Pharmaceutical Compounds in Hospital Wastewater

Álamo¹,

Pariente²,

Sánchez-Bayo³

et al. 2021

AEER

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Hospitals are one of the key contributors of pharmaceutical contaminants of emerging concern to the sewer systems. Hospitals wastewaters contain concentrations of pharmaceutical compounds between 3 and 150, which are higher than urban wastewater streams. However, dedicated treatments of the hospital effluents before discharge to the sewer system are not compulsory. Besides, conventional wastewater treatment plants have not been designed to remove pharmaceutical compounds effectively, and consequently, these micropollutants can reach the aquatic ecosystems. The removal of pharmaceutical compounds in real hospital wastewater was gaged using three different microbial cultures (white rot-fungus Trametes versicolor, microalga Isochrysis galbana, and a mixed culture of non-sulfur purple phototrophic bacteria). Before and after bioassays of the hospital wastewater, environmental hazard quotients were used to evaluate the biological treatment efficiency. Up to 45 out of the 79 compounds included in the analytical method were noticed in the hospital wastewater, with a predominance of analgesics/anti-inflammatories (acetaminophen, ibuprofen, ketoprofen, and naproxen). It was followed by antibiotics (azithromycin, ciprofloxacin, and ofloxacin, out of which the first two are included in the watch list of substances for monitoring in water in 2020) and anti-hypertensive drugs. Isochrysis galbana reached a reduction of 45% of the total concentration of pharmaceuticals, whereas Trametes versicolor and mixed culture of purple phototrophic bacteria improved the reductions up to 69% and 76%, respectively. Moreover, potential environmental risk compounds (antibiotics, particularly ciprofloxacin and ofloxacin) were removed by Trametes versicolor in higher extension, obtaining a total hazard quotient reduction higher than the other two cultures. Removal efficiency and environmental risk assessment of remaining PhACs were used to evaluate the performance of the new biological systems for the treatment of emerging pollutants. According to both criteria, T. versicolor seems the most capable alternative for removing pharmaceutical compounds in hospital wastewater effluents.

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Mechanisms of pharmaceutical and personal care product removal in algae-based wastewater treatment systems

Cited by 59 publications

References 62 publications

Cell growth and removal capacity of ibuprofen and diclofenac by Parachlorella kessleri at bench scale

Cell growth and removal capacity of ibuprofen and diclofenac by Parachlorella kessleri at bench scale

Can high rate algal ponds be used as post-treatment of UASB reactors to remove micropollutants?

Assessment of Trametes versicolor, Isochrysis galbana, and Purple Phototrophic Bacteria for the Removal of Pharmaceutical Compounds in Hospital Wastewater

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