Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | State of the art and perspectives of ultrasound application for sewage sludge processing |
| Abstract | The application of ultrasound to sludge is an efficient method for sludge disintegration in order to accelerate the anaerobic digestion process, but energy balance on the basis of lab tests is disadvantaged due to the inefficiency at this scale. In this paper the energy balance is discussed for five full scale WWTPs equipped with different devices with the aim to investigate the cost-effectiveness of the ultrasonic pre-treatment before digestion. These five experiences show positive energy gains operating at 20 kHz: best performances are attained at short sonication time and high sonication power. Moreover, sludge sonication at 200 kHz is presented as an alternative pretreatment to improve the anaerobic digestibility and to remove potentially organic micropollutants. Lab experiment results of this treatment indicated quite good disintegration effect, in terms of substrate solubilization, with consequent acceleration of the hydrolysis phase and increase of biogas production. |
| Source | 11th IWA Specialised Conference on Design, Operation and Economics of Large Wastewater Treatment Plants, Budapest (Hungary), 4-8/09/2011 |
| Keywords | anaerobic digestionenergy balancefrequencyultrasounds |
| Year | 2011 |
| Type | Contributo in atti di convegno |
| Authors | Gianico A., Gallipoli A., Braguglia C.M., Mininni G. |
| Text | 89829 2011 anaerobic digestion energy balance frequency ultrasounds State of the art and perspectives of ultrasound application for sewage sludge processing Gianico A., Gallipoli A., Braguglia C.M., Mininni G. IRSA CNR, Water research institute. Via Salaria km 29.300 00015 Monterotondo Rome The application of ultrasound to sludge is an efficient method for sludge disintegration in order to accelerate the anaerobic digestion process, but energy balance on the basis of lab tests is disadvantaged due to the inefficiency at this scale. In this paper the energy balance is discussed for five full scale WWTPs equipped with different devices with the aim to investigate the cost effectiveness of the ultrasonic pre treatment before digestion. These five experiences show positive energy gains operating at 20 kHz best performances are attained at short sonication time and high sonication power. Moreover, sludge sonication at 200 kHz is presented as an alternative pretreatment to improve the anaerobic digestibility and to remove potentially organic micropollutants. Lab experiment results of this treatment indicated quite good disintegration effect, in terms of substrate solubilization, with consequent acceleration of the hydrolysis phase and increase of biogas production. Proceedings of 11th IWA Specialised Conference on Design, Operation and Economics of Large Wastewater Treatment Plants Published version 11th IWA Specialised Conference on Design, Operation and Economics of Large Wastewater Treatment Plants Budapest Hungary 4 8/09/2011 Internazionale Contributo State of the art and perspectives of ultrasound application for sewage sludge processing Contributo in atti di convegno P_02_first069, Gianico et al..pdf Contributo in atti di convegno agata.gallipoli GALLIPOLI AGATA camillamaria.braguglia BRAGUGLIA CAMILLA MARIA giuseppe.mininni MININNI GIUSEPPE andrea.gianico GIANICO ANDREA TA.P07.001.004 Trattamenti per il riutilizzo e per lo smaltimento dei fanghi di depurazione |