Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Sequential Anaerobic-Aerobic Digestion of Secondary Sludge: Aerobic Temperature Effect on the Process Performance |
| Abstract | In this paper we investigated the sequential anaerobic-aerobic digestion of secondary sludge in two series of tests performed at different aerobic temperatures: 20°C in the first series (S1) and 37 °C in the second one (S2). In both series, the aerobic phase was operated under intermittent aeration to achieve nitrogen removal. A very positive effect of the increased temperature on the process performance was observed. Achieved additional VS removal in the aerobic phase was 19.6% and 32.8% for S1 and S2 respectively. Specific biogas production was 0.95 Nm3/(kg/VSdestroyed) for both series. Nitrification efficiencies >= 80% were achieved in the entire experimental period, while a significant increase of the denitrification efficiency, up to 97%, was observed for S2. The beneficial effect of the increased aerobic temperature on the dewaterability of the digested sludge was also demonstrated by the CST trend showing a decrease of 26% in S1 and 51% in S2. |
| Source | WEF/IWA Residuals and Biosolids Conference 2015: The Next Generation of Science, Technology, and Management, Washington D.C., USA, 7/06/2015, 10/06/2015 |
| Keywords | Sequential anaerobic-aerobic digestionaerobic temperature effectsludge stabilizationvolatile solid removalsecondary sludge |
| Year | 2015 |
| Type | Contributo in atti di convegno |
| Authors | Tomei, M.C., Mosca Angelucci, D. |
| Text | 372169 2015 Sequential anaerobic aerobic digestion aerobic temperature effect sludge stabilization volatile solid removal secondary sludge Sequential Anaerobic Aerobic Digestion of Secondary Sludge Aerobic Temperature Effect on the Process Performance Tomei, M.C., Mosca Angelucci, D. Water Research Institute, C.N.R., Via Salaria km 29.300, 00015 Monterotondo Scalo Rome Italy In this paper we investigated the sequential anaerobic aerobic digestion of secondary sludge in two series of tests performed at different aerobic temperatures 20°C in the first series S1 and 37 °C in the second one S2 . In both series, the aerobic phase was operated under intermittent aeration to achieve nitrogen removal. A very positive effect of the increased temperature on the process performance was observed. Achieved additional VS removal in the aerobic phase was 19.6% and 32.8% for S1 and S2 respectively. Specific biogas production was 0.95 Nm3/ kg/VSdestroyed for both series. Nitrification efficiencies >= 80% were achieved in the entire experimental period, while a significant increase of the denitrification efficiency, up to 97%, was observed for S2. The beneficial effect of the increased aerobic temperature on the dewaterability of the digested sludge was also demonstrated by the CST trend showing a decrease of 26% in S1 and 51% in S2. Published version WEF/IWA Residuals and Biosolids Conference 2015 The Next Generation of Science, Technology, and Management Washington D.C., USA 7/06/2015, 10/06/2015 Internazionale Contributo Contributo in atti di convegno domenica.moscaangelucci MOSCA ANGELUCCI DOMENICA mariaconcetta.tomei TOMEI MARIA CONCETTA |