The paper summarizes the results of researches realized at full and pilot scale by Istituto Mario Negri (IT) and Politecnico di Milano on the presence, fate and removal of pharmaceutical active compounds (PhACs) in the sewage of Milan Nosedo WWTP. Removal rates in Nosedo WWTP were higher than those measured in other treatment plants in Italy but many PhACs were still present in treated water, at concentration ranges spanning from few to several hundred ng·L-1. Four sampling campaign were realized on the full plant conventional activated sludge plant (CAS) and a pilot membrane bioreactor (MBR), to compare the removal efficiency and sludge adsorption capacity and to study the effect of sludge retention time (SRT) on removal rates in MBR. Higher removal rates were observed for some PhACs in MBR, but not for the recalcitrant ones. Moreover, the operation of the MBR at four SRTs in the range 15-50 days did not demonstrate an effect of this parameter on PhACs removal. Adsorption on sludge of selected PhACs was evidenced.
Pharmaceutical active compounds fate and removal in Milan Nosedo WWTP: results of a 4 years research at full and pilot scale
MALPEI, FRANCESCA;BOUJU, HELENE;BUTTIGLIERI, GIANLUIGI;
2012-01-01
Abstract
The paper summarizes the results of researches realized at full and pilot scale by Istituto Mario Negri (IT) and Politecnico di Milano on the presence, fate and removal of pharmaceutical active compounds (PhACs) in the sewage of Milan Nosedo WWTP. Removal rates in Nosedo WWTP were higher than those measured in other treatment plants in Italy but many PhACs were still present in treated water, at concentration ranges spanning from few to several hundred ng·L-1. Four sampling campaign were realized on the full plant conventional activated sludge plant (CAS) and a pilot membrane bioreactor (MBR), to compare the removal efficiency and sludge adsorption capacity and to study the effect of sludge retention time (SRT) on removal rates in MBR. Higher removal rates were observed for some PhACs in MBR, but not for the recalcitrant ones. Moreover, the operation of the MBR at four SRTs in the range 15-50 days did not demonstrate an effect of this parameter on PhACs removal. Adsorption on sludge of selected PhACs was evidenced.| File | Dimensione | Formato | |
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