| Title | Start-up of a granular sludge sequencing batch reactor for the treatment of 2,4-dichlorophenol-contaminated wastewater |
| Abstract | In this study, a granular sludge sequencing batch reactor (GSBR) was started-up for the biological aerobic treatment of wastewater containing highly toxic 2,4-dichlorophenol (2,4-DCP), in presence of readily biodegradable sodium acetate (NaAc) as the growth 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 were achieved only when high NaAc influent concentration and volumetric organic loading rates (800 mg/L and 1.9 kgCOD/(m(3)·d), respectively), prolonged reaction phase (cycle time of 4 hours) and gradual increase of 2,4-DCP concentration in the influent were applied, thus providing useful information for process optimization in view of future scale-up. Granules were initially colonized by fungi which progressively disappeared during the start-up process, and complete 2,4-DCP removal was mostly due to bacterial activity, in particular Betaproteobacteria, as shown by fluorescence in situ hybridization (FISH). |
| Source | Water science and technology 68 (10), pp. 2151–2157 |
| Keywords | aerobic granular sludgechlorophenolcometabolismFISHgrowth substratewastewater treatment |
| Journal | Water science and technology |
| Editor | IWA Publishing, London, |
| Year | 2013 |
| Type | Articolo in rivista |
| DOI | 10.2166/wst.2013.470 |
| Authors | Milia S., Porcu R., Rossetti S., Carucci A. |
| Text | 275414 2013 10.2166/wst.2013.470 aerobic granular sludge chlorophenol cometabolism FISH growth substrate wastewater treatment Start up of a granular sludge sequencing batch reactor for the treatment of 2,4 dichlorophenol contaminated wastewater Milia S., Porcu R., Rossetti S., Carucci A. Istituto di Geologia Ambientale e Geoingegneria IGAG CNR ; Dipartimento di Ingegneria Civile, Ambientale e Architettura DICAAR Universita di Cagliari; Istituto di Ricerca sulle Acque IRSA CNR . In this study, a granular sludge sequencing batch reactor GSBR was started up for the biological aerobic treatment of wastewater containing highly toxic 2,4 dichlorophenol 2,4 DCP , in presence of readily biodegradable sodium acetate NaAc as the growth 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 were achieved only when high NaAc influent concentration and volumetric organic loading rates 800 mg/L and 1.9 kgCOD/ m 3 ·d , respectively , prolonged reaction phase cycle time of 4 hours and gradual increase of 2,4 DCP concentration in the influent were applied, thus providing useful information for process optimization in view of future scale up. Granules were initially colonized by fungi which progressively disappeared during the start up process, and complete 2,4 DCP removal was mostly due to bacterial activity, in particular Betaproteobacteria, as shown by fluorescence in situ hybridization FISH . 68 Start up of a granular sludge sequencing batch reactor for the treatment of 2,4 dichlorophenol contaminated wastewater Start_up_of_a_granular_sludge_sequencing_batch_reactor_for_the_treatment_of_2_4_dcp_contaminated_wastewater.pdf Articolo in rivista IWA Publishing 0273 1223 Water science and technology Water science and technology Water science and technology. Water sci. technol. 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 |
