Occurrence and removal of micropollutants in full-scale aerobic, anaerobic and facultative wastewater treatment plants in Brazil
Autor: | Lucas Vassalle, Jan Dolfing, Russell J. Davenport, Oladapo Komolafe, César R. Mota, Kishor Acharya, Wojciech Mrozik |
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Rok vydání: | 2020 |
Předmět: |
Environmental Engineering
Trickling filter 0208 environmental biotechnology 02 engineering and technology 010501 environmental sciences Management Monitoring Policy and Law Wastewater 01 natural sciences Waste Disposal Fluid Water Purification chemistry.chemical_compound Predicted no-effect concentration Anaerobiosis Waste Management and Disposal Effluent Environmental quality 0105 earth and related environmental sciences Facultative Sewage General Medicine 020801 environmental engineering Triclosan Activated sludge chemistry Environmental chemistry Environmental science Sewage treatment Brazil Water Pollutants Chemical |
Zdroj: | Journal of environmental management. 287 |
ISSN: | 1095-8630 |
Popis: | This study aims to evaluate micropollutant occurrence and removal in a low-middle income country (LMIC) by investigating the occurrence of 28 chemicals from different classes (triclosan, 15 polycyclic aromatic hydrocarbons (PAHs), 4 estrogens and 8 polybrominated diphenyl ether (PBDE) congeners) in three technologically diverse full-scale Brazilian wastewater treatment plants (WWTPs). These chemicals were detected at concentrations similar to those reported in other low-middle income countries (LMICs) and high-income countries (HICs) (0.1–49 μg/L) indicating their widespread use globally and the need for more studies in LMICs that are typically characterized by relatively inadequate wastewater treatment barriers. Among the three different WWTPs investigated for removal of these chemicals, the least energy intensive system, waste stabilization ponds (WSPs), was the most effective (95–99%) compared to the activated sludge (79–94%), and Up-flow sludge blanket reactor (UASB) with trickling filters system (89–95%). These results highlight the potential of WSPs for micropollutant removal-especially in warm climates. However, the effluent from all three WWTP could pose a risk to aquatic organisms when discharged into the receiving waters as the effluent concentrations of triclosan, some estrogens, PAHs and BDE 209 were above European environmental quality standards (EQS) or predicted no effect concentration (PNEC values), indicating that receiving water bodies could benefit from further treatment. In combination, these results help to further understand prevailing concentrations of micropollutants globally and fate in current wastewater treatment systems. |
Databáze: | OpenAIRE |
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