Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Reduced temperature hydrolysis at 134 °C before thermophilic anaerobic digestion of waste activated sludge at increasing organic load |
| Abstract | The performance of thermophilic digestion of waste activated sludge, either untreated or thermal pretreated, was evaluated through semi-continuous tests carried out at organic loading rates in the range of 1-3.7 kg VS/m3 d. Although the thermal pretreatment at T = 134 C proved to be effective in solubilizing organic matter, no significant gain in organics degradation was observed. However, the digestion of pretreated sludge showed significant soluble COD removal (more than 55%) whereas no removal occurred in control reactors. The lower the initial sludge biodegradability, the higher the efficiency of thermal pretreated digestion was observed, in particular as regards higher biogas and methane production rates with respect to the parallel untreated sludge digestion. Heat balance of the combined thermal hydrolysis/thermophilic digestion process, applied on full-scale scenarios, showed positive values for direct combustion of methane. In case of combined heat and power generation, attractive electric energy recoveries were obtained, with a positive heat balance at high load. |
| Source | Bioresource technology 143, pp. 96–103 |
| Keywords | Thermal hydrolysisOrganic loading rateMethaneDewaterabilitySupernatants |
| Journal | Bioresource technology |
| Editor | Elsevier Applied Science,, Barking, Regno Unito |
| Year | 2013 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.biortech.2013.05.069 |
| Authors | Gianico A., Braguglia C.M., Cesarini R., Mininni G. |
| Text | 229499 2013 10.1016/j.biortech.2013.05.069 Thermal hydrolysis Organic loading rate Methane Dewaterability Supernatants Reduced temperature hydrolysis at 134 °C before thermophilic anaerobic digestion of waste activated sludge at increasing organic load Gianico A., Braguglia C.M., Cesarini R., Mininni G. Irsa CNR The performance of thermophilic digestion of waste activated sludge, either untreated or thermal pretreated, was evaluated through semi continuous tests carried out at organic loading rates in the range of 1 3.7 kg VS/m3 d. Although the thermal pretreatment at T = 134 C proved to be effective in solubilizing organic matter, no significant gain in organics degradation was observed. However, the digestion of pretreated sludge showed significant soluble COD removal more than 55% whereas no removal occurred in control reactors. The lower the initial sludge biodegradability, the higher the efficiency of thermal pretreated digestion was observed, in particular as regards higher biogas and methane production rates with respect to the parallel untreated sludge digestion. Heat balance of the combined thermal hydrolysis/thermophilic digestion process, applied on full scale scenarios, showed positive values for direct combustion of methane. In case of combined heat and power generation, attractive electric energy recoveries were obtained, with a positive heat balance at high load. 143 http //dx.doi.org/10.1016/j.biortech.2013.05.069 Reduced temperature hydrolysis at 134 °C before thermophilic anaerobic digestion of waste activated sludge at increasing organic load 2013_Reduced_temperature_hydrolysis_at_134_C_BITE.pdf Articolo in rivista Elsevier Applied Science, 0960 8524 Bioresource technology Bioresource technology Bioresour. technol. Bioresource technology. camillamaria.braguglia BRAGUGLIA CAMILLA MARIA giuseppe.mininni MININNI GIUSEPPE andrea.gianico GIANICO ANDREA TA.P07.001.005 Recupero di risorse da rifiuti e biomasse |