Performance of Micropollutant Removal during Wet-Weather Conditions in Advanced Treatment Stages on a Full-Scale WWTP
The reduction of organic micropollutants (OMP) in rivers, lakes and groundwater is an essential legal obligation of the European Water Framework Directive. Since OMP treatment in full-scale wastewater treatment plants (WWTPs) is not state of the art yet, there is little knowledge regarding removal p...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-10-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/14/20/3281 |
| _version_ | 1797469564180627456 |
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| author | Johanna Neef Dominik Leverenz Marie Alexandra Launay |
| author_facet | Johanna Neef Dominik Leverenz Marie Alexandra Launay |
| author_sort | Johanna Neef |
| collection | DOAJ |
| description | The reduction of organic micropollutants (OMP) in rivers, lakes and groundwater is an essential legal obligation of the European Water Framework Directive. Since OMP treatment in full-scale wastewater treatment plants (WWTPs) is not state of the art yet, there is little knowledge regarding removal performances, in particular during wet weather. We aimed to contribute to filling this knowledge gap by providing insights from a German case study. On-site measurements were conducted to investigate the impact of rain events on OMP removal with activated carbon processes using powdered activated carbon (PAC) and granular activated carbon (GAC). The study focused on 26 OMPs with different entry paths in the combined sewer system (CSS) and various physico-chemical properties. The monitored OMPs showed higher mass loads during wet weather at all sampling points: effluent of the secondary clarifier, effluent of the PAC treatment stage, and effluent of the GAC filter. As a result of shortened hydraulic retention time (HRT) due to rain events, the overall OMP removal was significantly lower (42% PAC and 46% GAC) than during dry weather (68% PAC and 62% GAC). In order to achieve constant removal rates during all weather conditions, the critical process control parameters are currently being investigated in ongoing studies. |
| first_indexed | 2024-03-09T19:23:07Z |
| format | Article |
| id | doaj.art-a1a316813fbe48e0b57965069e178e11 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-09T19:23:07Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-a1a316813fbe48e0b57965069e178e112023-11-24T03:12:50ZengMDPI AGWater2073-44412022-10-011420328110.3390/w14203281Performance of Micropollutant Removal during Wet-Weather Conditions in Advanced Treatment Stages on a Full-Scale WWTPJohanna Neef0Dominik Leverenz1Marie Alexandra Launay2Micropollutants Competence Centre Baden-Württemberg, Bandtäle 2, 70569 Stuttgart, GermanyInstitute for Sanitary Engineering, Water Quality and Solid Waste Management (ISWA), University of Stuttgart, Bandtäle 2, 70569 Stuttgart, GermanyMicropollutants Competence Centre Baden-Württemberg, Bandtäle 2, 70569 Stuttgart, GermanyThe reduction of organic micropollutants (OMP) in rivers, lakes and groundwater is an essential legal obligation of the European Water Framework Directive. Since OMP treatment in full-scale wastewater treatment plants (WWTPs) is not state of the art yet, there is little knowledge regarding removal performances, in particular during wet weather. We aimed to contribute to filling this knowledge gap by providing insights from a German case study. On-site measurements were conducted to investigate the impact of rain events on OMP removal with activated carbon processes using powdered activated carbon (PAC) and granular activated carbon (GAC). The study focused on 26 OMPs with different entry paths in the combined sewer system (CSS) and various physico-chemical properties. The monitored OMPs showed higher mass loads during wet weather at all sampling points: effluent of the secondary clarifier, effluent of the PAC treatment stage, and effluent of the GAC filter. As a result of shortened hydraulic retention time (HRT) due to rain events, the overall OMP removal was significantly lower (42% PAC and 46% GAC) than during dry weather (68% PAC and 62% GAC). In order to achieve constant removal rates during all weather conditions, the critical process control parameters are currently being investigated in ongoing studies.https://www.mdpi.com/2073-4441/14/20/3281micropollutant removalpowdered activated carbon (PAC)granulated activated carbon (GAC)wet-weather conditionswastewater treatmentcombined sewer systems (CSS) |
| spellingShingle | Johanna Neef Dominik Leverenz Marie Alexandra Launay Performance of Micropollutant Removal during Wet-Weather Conditions in Advanced Treatment Stages on a Full-Scale WWTP Water micropollutant removal powdered activated carbon (PAC) granulated activated carbon (GAC) wet-weather conditions wastewater treatment combined sewer systems (CSS) |
| title | Performance of Micropollutant Removal during Wet-Weather Conditions in Advanced Treatment Stages on a Full-Scale WWTP |
| title_full | Performance of Micropollutant Removal during Wet-Weather Conditions in Advanced Treatment Stages on a Full-Scale WWTP |
| title_fullStr | Performance of Micropollutant Removal during Wet-Weather Conditions in Advanced Treatment Stages on a Full-Scale WWTP |
| title_full_unstemmed | Performance of Micropollutant Removal during Wet-Weather Conditions in Advanced Treatment Stages on a Full-Scale WWTP |
| title_short | Performance of Micropollutant Removal during Wet-Weather Conditions in Advanced Treatment Stages on a Full-Scale WWTP |
| title_sort | performance of micropollutant removal during wet weather conditions in advanced treatment stages on a full scale wwtp |
| topic | micropollutant removal powdered activated carbon (PAC) granulated activated carbon (GAC) wet-weather conditions wastewater treatment combined sewer systems (CSS) |
| url | https://www.mdpi.com/2073-4441/14/20/3281 |
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