Quantification, removal and potential ecological risk of emerging contaminants in different organic loads of swine wastewater treated by integrated biological reactors

• Published in: Chemosphere (Oxford) 2020-12, Vol.260, p.127516-127516, Article 127516
• Main Authors: Oliveira, Jacineumo Falcão de, Fia, Ronaldo, Rodrigues, Fernando Neris, Fia, Fátima Resende Luiz, Matos, Mateus Pimentel de, Siniscalchi, Luciene Alves Batista, Sanson, Ananda Lima
• Format: Article
• Language: English
• Subjects: Bisphenol-A; Effluent treatment; Endocrine disruptors; Environmental hazards; Estrogen removal
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2020.127516

This study aims to evaluate the dynamics and their ecological risks for aquatic species of lipid regulator, nervous stimulant, anti-inflammatory and endocrine disrupters in an upflow anaerobic sludge blanket (UASB), submerged aerated biological filters (SABF) and horizontal subsurface flow constructed wetland (HSSF-CW) reactors that treat swine wastewater. Four organic loads of swine wastewater (SW) were used according to changing the chemical oxygen demand. 13 contaminants were quantified, standing out the endocrine disruptors, lipid regulator and anti-inflammatory. In phase III, 8318.4 ng L−1 of 4-ocylphenol was found at the influent of the UASB reactor and removal from 1877.1 to 13.7 ng L−1 in the bisphenol A system. With the maximum organic load, there was a reduction among all the treatment units, with concentrations between 1877.1 and 13.7 ng L−1 of bisphenol A and had naproxen removal of 94.5% and 2,7 ng L−1 after treating phases II and III. It was found that 24.6% of the contaminants presented a high ecological risk, with maximum values of 27.4 (4-nonylphenol, phase II), 24.6 and 5.9 (17β-estradiol, phase IV and I, respectively), 13.4 (4-ocylphenol, phase III) and 4.4 (estrone, phase IV) in the influent system. The reduction of ecological risk potentials was optimized by SABF and HSSF-CW. The effect oxygen availability and microbiological activities optimized the reduction of ecological risks on zebrafish (Danio rerio) and cnidarian (Hydra attenuata) species, moreover, the reduction of mass flows and ecological risks of the emerging contaminants are associated with the use of biological reactors in series and organic stabilizations. [Display omitted] •Thirteen emerging contaminants were quantified in four organic loads in the effluent.•The compound bisphenol A persisted in the effluent after biological treatment.•24.6% of the data has high ecological risks associated by endocrine disruptor.•It was verified reduction mass flow and ecological risk of anti-inflammatory drugs.