Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | High frequency ultrasound pretreatment for sludge anaerobic digestion: effect on floc structure and microbial population |
| Abstract | In this work the potential of high frequency ultrasounds as pretreatment for sludge anaerobic digestion has been assessed. Irradiation with 200 kHz ultrasounds was efficient in disintegrating the floc structure increasing the available fraction of soluble organic matter (up to seven times at 25,000 kJ/kg TS). Batch anaerobic digestion tests were carried out on lab-scale reactors fed either with untreated or disintegrated sludge inoculated with anaerobic sludge, at different feed/inoculum ratio (F/I = 0.5 and 1). Degradation of particulate matter, biogas production and related microbial community composition (estimated by fluorescence in situ hybridization, FISH) were investigated. Sludge ultrasounds pretreatment led to an overall improvement of the digestion performances, with a maximum biogas gain of 40% at F/I = 0.5. FISH showed a key-role of Methanosarcina spp. in the main reactions of biogas synthesis. |
| Source | Bioresource technology 110, pp. 43–49 |
| Keywords | FISHanaerobic digestionsonication |
| Journal | Bioresource technology |
| Editor | Elsevier Applied Science,, Barking, Regno Unito |
| Year | 2012 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.biortech.2012.01.074 |
| Authors | Braguglia C.M., Gagliano M.C., Rossetti S. |
| Text | 191704 2012 10.1016/j.biortech.2012.01.074 FISH anaerobic digestion sonication High frequency ultrasound pretreatment for sludge anaerobic digestion effect on floc structure and microbial population Braguglia C.M., Gagliano M.C., Rossetti S. In this work the potential of high frequency ultrasounds as pretreatment for sludge anaerobic digestion has been assessed. Irradiation with 200 kHz ultrasounds was efficient in disintegrating the floc structure increasing the available fraction of soluble organic matter up to seven times at 25,000 kJ/kg TS . Batch anaerobic digestion tests were carried out on lab scale reactors fed either with untreated or disintegrated sludge inoculated with anaerobic sludge, at different feed/inoculum ratio F/I = 0.5 and 1 . Degradation of particulate matter, biogas production and related microbial community composition estimated by fluorescence in situ hybridization, FISH were investigated. Sludge ultrasounds pretreatment led to an overall improvement of the digestion performances, with a maximum biogas gain of 40% at F/I = 0.5. FISH showed a key role of Methanosarcina spp. in the main reactions of biogas synthesis. 110 Published version High frequency ultrasound pretreatment for sludge anaerobic digestion Effect on floc structure and microbial population BITE_2012.pdf Articolo in rivista Elsevier Applied Science, 0960 8524 Bioresource technology Bioresource technology Bioresour. technol. Bioresource technology. GAGLIANO MARIA CRISTINA simona.rossetti ROSSETTI SIMONA camillamaria.braguglia BRAGUGLIA CAMILLA MARIA TA.P07.001.005 Recupero di risorse da rifiuti e biomasse |