Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | IS SONICATION EFFECTIVE TO IMPROVE BIOGAS PRODUCTION AND SOLIDS REDUCTION IN EXCESS SLUDGE DIGESTION? |
| Abstract | Results of three semi-continuous anaerobic test were reported and discussed. Each test was carried out by two parallel anaerobic reactors fed with waste activated sludge, either as it was sampled from the sewage treatment plant of Rome North or previously disintegrated by ultrasound treatment. Activated sludge was sonicated at the energy input of 5,000 or 2,500 kJ kg-1 dry solids corresponding to a disintegration degree of approximately 8 or 4%, respectively. Sonication proved to be effective both in increasing VS destruction and cumulative biogas production. The best increase of VS destruction (from 30 to 35%) was performed in test #3 carried out at high organic load (10 d residence time) and low energy input (2,500 kJ kg-1 dry solids). The best increase in cumulative biogas production (from 472 to 640 NL after 67 d of tests i.e.) was obtained in test #1 at low organic load (20 d residence time) and high energy input (5,000 kJ kg-1 dry solids). Specific biogas production varied in the tests carried out with untreated sludge (0.55 - 0.67 Nm3 kg-1 VS destroyed) but was practically unchanged for all the tests with sonicated sludge (0.7 Nm3 kg-1 VS destroyed). |
| Source | Water science and technology |
| Keywords | Activated sludgeanaerobic digestionbiogasultrasoundheat balance |
| Journal | Water science and technology |
| Editor | IWA Publishing, London, |
| Year | 2007 |
| Type | Articolo in rivista |
| Authors | BRAGUGLIA C.M., MININNI G., GIANICO A. |
| Text | 89493 2007 Activated sludge anaerobic digestion biogas ultrasound heat balance IS SONICATION EFFECTIVE TO IMPROVE BIOGAS PRODUCTION AND SOLIDS REDUCTION IN EXCESS SLUDGE DIGESTION BRAGUGLIA C.M., MININNI G., GIANICO A. irsa cnr Results of three semi continuous anaerobic test were reported and discussed. Each test was carried out by two parallel anaerobic reactors fed with waste activated sludge, either as it was sampled from the sewage treatment plant of Rome North or previously disintegrated by ultrasound treatment. Activated sludge was sonicated at the energy input of 5,000 or 2,500 kJ kg 1 dry solids corresponding to a disintegration degree of approximately 8 or 4%, respectively. Sonication proved to be effective both in increasing VS destruction and cumulative biogas production. The best increase of VS destruction from 30 to 35% was performed in test #3 carried out at high organic load 10 d residence time and low energy input 2,500 kJ kg 1 dry solids . The best increase in cumulative biogas production from 472 to 640 NL after 67 d of tests i.e. was obtained in test #1 at low organic load 20 d residence time and high energy input 5,000 kJ kg 1 dry solids . Specific biogas production varied in the tests carried out with untreated sludge 0.55 0.67 Nm3 kg 1 VS destroyed but was practically unchanged for all the tests with sonicated sludge 0.7 Nm3 kg 1 VS destroyed . Published version Articolo in rivista IWA Publishing 0273 1223 Water science and technology Water science and technology Water science and technology. Water sci. technol. camillamaria.braguglia BRAGUGLIA CAMILLA MARIA giuseppe.mininni MININNI GIUSEPPE andrea.gianico GIANICO ANDREA TA.P07.001.003 Processi innovativi per il trattamento e lo smaltimento dei fanghi di depurazione |