Removal of nonylphenol ethoxylate surfactant in batch reactors: emphasis on methanogenic potential and microbial community characterization under optimized conditions

Nonylphenol ethoxylate (NPE) is an endocrine-disrupting chemical that has bioaccumulative, persistent and toxic characteristics in different environmental matrices and is difficult to remove in sewage treatment plants. In this study, the effects of the initial concentration of NPE (0.2 ± 0.03 - 3.0 ...

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Published in:Environmental technology 2024-03, Vol.45 (7), p.1343-1357
Main Authors: Teixeira, Rômulo Mota, Sakamoto, Isabel Kimiko, Motteran, Fabrício, Camargo, Franciele Pereira, Varesche, Maria Bernadete Amâncio
Format: Article
Language:English
Subjects:
acetoanaerobium
Batch reactors
Bioaccumulation
Biodegradation
Bioreactors
central composite rotational delineation
co-substrates
endocrine disruptor
Endocrine disruptors
Ethanol
Factorial design
Microorganisms
Non-ionic surfactant
Nonylphenol ethoxylate
Organic matter
Reactors
Relative abundance
Sewage treatment plants
Sodium bicarbonate
Surfactants
Wastewater treatment plants
Yeasts
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Summary:Nonylphenol ethoxylate (NPE) is an endocrine-disrupting chemical that has bioaccumulative, persistent and toxic characteristics in different environmental matrices and is difficult to remove in sewage treatment plants. In this study, the effects of the initial concentration of NPE (0.2 ± 0.03 - 3.0 ± 0.02 mg. L −1 ) and ethanol (73.9 ± 5.0-218.6 ± 10.6 mg. L −1 ) were investigated using factorial design. Assays were carried out in anaerobic batch reactors, using the Zinder basal medium, yeast extract (200 mg. L −1 ), vitamin solution and sodium bicarbonate (10% v/v). The optimal conditions were 218.56 mg.L −1 of ethanol and 1596.51 µg.L −1 of NPE, with 92% and 88% of NPE and organic matter removal, respectively, and methane yield (1689.8 ± 59.6 mmol) after 450 h of operation. In this condition, bacteria potentially involved in the degradation of this surfactant were identified in greater relative abundance, such as Acetoanaerobium (1.68%), Smithella (1.52%), Aminivibrio (0.91%), Petrimonas (0.57%) and Enterobacter (0.47%), as well as archaea Methanobacterium and Methanoregula, mainly involved in hydrogenotrophic pathway.
ISSN:0959-3330
1479-487X
DOI:10.1080/09593330.2022.2143287