Devenir des polybromodiphényléthers et des alkylphénols dans les filières de traitement des eaux usées : cas des fonctionnements optimisés par temps sec et dégradés par temps de pluie

Abstract : This study investigates the fate of polybromodiphenylethers (PBDE) and alkylphenols (AP) within two sewage treatment plants, Seine-Centre and Seine-Amont, located in Paris conurbation. Samplings were performed under dry and wet-weather flows to determine the raw water quality and the performances of the primary and secondary treatment. During dry-weather periods, mean concentrations of ∑6AP and ∑4PBDE in Seine-Amont raw sewage were respectively 6 times and twice higher. This is due to a highly industrialized watershed for Seine-Amont, and a strong dilution in Seine-Centre sewer network. Under wet-weather flows, the particulate pollution increases markedly in Seine-Centre raw sewage, due to the erosion of in-sewer deposits. As a primary treatment, the physico-chemical lamella settler in Seine-Centre clearly improves the removal of particulate and organic pollutions. Its performances are constant and much higher than normal settling in Seine-Amont. Under wet-weather flows, the performances of both techniques are maintained or improved, despite higher pollutant loads and ascensional velocity. The dissolved pollution is not removed in the primary treatment, whatever the process. In the secondary treatment, high removal is obtained for both biofiltres and activated sludge processes. Seine-Centre and Seine-Amont secondary effluents reach a similar quality, although particulate pollution and PBDE concentrations remain slightly higher in Seine-Amont. Under wet-weather flows, one stage of Seine-Centre biofiltration unit is derived and aerated. In these specific conditions, nitrates and BDE-209 removal is impacted. For activated sludge in Seine-Amont, performances are slightly decreased but remains over 80 % for most parameters. Hence, in Seine-Amont secondary effluents, PBDE pollution is from 1.4 to 3 times higher under wet-weather flows
Document type :
Theses
Complete list of metadatas

Cited literature [254 references]  Display  Hide  Download

https://pastel.archives-ouvertes.fr/pastel-00704869
Contributor : Abes Star <>
Submitted on : Wednesday, June 6, 2012 - 2:07:26 PM
Last modification on : Wednesday, September 4, 2019 - 1:52:17 PM
Long-term archiving on : Friday, September 7, 2012 - 2:30:58 AM

File

TH2011PEST1082_complete.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : pastel-00704869, version 1

Citation

Solène Gilbert Pawlik. Devenir des polybromodiphényléthers et des alkylphénols dans les filières de traitement des eaux usées : cas des fonctionnements optimisés par temps sec et dégradés par temps de pluie. Sciences de la Terre. Université Paris-Est, 2011. Français. ⟨NNT : 2011PEST1082⟩. ⟨pastel-00704869⟩

Share

Metrics

Record views

742

Files downloads

932