Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Start-up of a Granular sludge Sequencing Batch Reactor for the treatment of 2,4-dichlorophenol contaminated wastewater |
| Abstract | Chlorophenols are characterized by high toxicity even at relatively low concentrations, strong tendency to bioaccumulate and persistency in water and soil. In this study, a Granular sludge Sequencing Batch Reactor (GSBR) was started-up for the biological aerobic treatment of wastewater containing 2,4-dichlorophenol (2,4-DCP), in presence of readily biodegradable sodium acetate (NaAc) as the biogenic substrate. Different influent concentrations of NaAc (420-800 mg/L) and 2,4-DCP (0-20 mg/L), as well as different operating conditions (i.e. cycle length) were tested in order to determine the optimal strategy for successful GSBR start-up: stable granulation and complete 2,4-DCP removal with stoichiometric chloride release (indicating the complete dechlorination of the toxic compound) were achieved only when high NaAc influent concentration and volumetric organic loading rates (800 mg/L and 1.9 kgCOD/m3?d, respectively), prolonged reaction phase (cycle time of 4 hours) and gradual increase of 2,4-DCP concentration in the influent up to 20 mg/L were applied, thus providing useful information for process optimization in view of future scale-up. Granules were initially colonised by fungi which disappeared throughout the experimental activity, and complete 2,4-DCP removal was mostly due to bacterial activity. |
| Source | IWA - World Water Congress & Exhibition, Busan (Sud Corea), 16-21 Settembre 2012 |
| Keywords | ChlorophenolcometabolismFISHaerobic granular sludgegrowth substrate |
| Year | 2012 |
| Type | Contributo in atti di convegno |
| Authors | S. Milia, R. Porcu, S. Rossetti, A. Carucci |
| Text | 194574 2012 Chlorophenol cometabolism FISH aerobic granular sludge growth substrate Start up of a Granular sludge Sequencing Batch Reactor for the treatment of 2,4 dichlorophenol contaminated wastewater S. Milia, R. Porcu, S. Rossetti, A. Carucci Istituto di Geologia Ambientale e Geoingegneria IGAG CNR ; Universita degli Studi di Cagliari Dipartimento di Ingegneria Civile Ambientale e Architettura DICAAR ; Istituto per la Ricerca Sulle Acque IRSA CNR Chlorophenols are characterized by high toxicity even at relatively low concentrations, strong tendency to bioaccumulate and persistency in water and soil. In this study, a Granular sludge Sequencing Batch Reactor GSBR was started up for the biological aerobic treatment of wastewater containing 2,4 dichlorophenol 2,4 DCP , in presence of readily biodegradable sodium acetate NaAc as the biogenic substrate. Different influent concentrations of NaAc 420 800 mg/L and 2,4 DCP 0 20 mg/L , as well as different operating conditions i.e. cycle length were tested in order to determine the optimal strategy for successful GSBR start up stable granulation and complete 2,4 DCP removal with stoichiometric chloride release indicating the complete dechlorination of the toxic compound were achieved only when high NaAc influent concentration and volumetric organic loading rates 800 mg/L and 1.9 kgCOD/m3 d, respectively , prolonged reaction phase cycle time of 4 hours and gradual increase of 2,4 DCP concentration in the influent up to 20 mg/L were applied, thus providing useful information for process optimization in view of future scale up. Granules were initially colonised by fungi which disappeared throughout the experimental activity, and complete 2,4 DCP removal was mostly due to bacterial activity. IWA World Water Congress Exhibition Busan Sud Corea 16 21 Settembre 2012 Internazionale Contributo Contributo in atti di convegno alessandracarucci CARUCCI ALESSANDRA simona.rossetti ROSSETTI SIMONA stefano.milia MILIA STEFANO TA.P07.014.002 Sviluppo di tecnologie di soil washing ; valutazione del rischio amianto |