| Title | Enhanced stabilization processes to produce sludge suitable for agricultural use |
| Abstract | The requirement of a more efficient stabilization process to obtain a more stable sludge for agricultural use and better energy balance is an increasing challenge to comply with the waste hierarchy. In this prospect, the ROUTES project is addressed to assess innovative solutions with the aim to produce good quality sludge with specific concern to stabilization and hygienization. In order to increase the anaerobic stabilization performances different disintegration pre-treatments (acoustic or hydrodynamic cavitation, and thermal hydrolysis) and an aerobic post-treatment were additionally investigated as regards the effect on solubilisation, dewaterability and digestion perfomances. Pre-treated stabilization processes improved anaerobic digestion in terms of volatile solids reduction and biogas production, but digestate dewaterability worsened. Fluorescence In Situ Hybridization (FISH) quantification showed an increase of methanogens consistent with the increase of biogas produced. Aerobic post-treatment, on the contrary, had a beneficial effect on the dewaterability and the stability of the digested sludge even if with a reduction of the potential energy recovery. |
| Source | 1st International IWA Conference on Holistic Sludge Management, Vasteras, Sweden, 05/2013 |
| Keywords | anaerobic-aerobic sequential treatment pretreamentdewaterabilityFISH analysisthermophilic anaerobic digestion |
| Year | 2013 |
| Type | Presentazione |
| Authors | Braguglia, C.M., Carozza, N., Gagliano, M.C., Gallipoli, A., Gianico, A., Rossetti, S., Suschka, J., Tomei, M.C., Mininni, G. |
| Text | 458578 2013 anaerobic aerobic sequential treatment pretreament dewaterability FISH analysis thermophilic anaerobic digestion Enhanced stabilization processes to produce sludge suitable for agricultural use Braguglia, C.M., Carozza, N., Gagliano, M.C., Gallipoli, A., Gianico, A., Rossetti, S., Suschka, J., Tomei, M.C., Mininni, G. Istituto di Ricerca sulle Acque CNR, Area della Ricerca RM1, Via Salaria km. 29,300 00015 Monterotondo Roma, Italy University of Bielsko Bia a, 43 300 Bielsko Bia a, Poland The requirement of a more efficient stabilization process to obtain a more stable sludge for agricultural use and better energy balance is an increasing challenge to comply with the waste hierarchy. In this prospect, the ROUTES project is addressed to assess innovative solutions with the aim to produce good quality sludge with specific concern to stabilization and hygienization. In order to increase the anaerobic stabilization performances different disintegration pre treatments acoustic or hydrodynamic cavitation, and thermal hydrolysis and an aerobic post treatment were additionally investigated as regards the effect on solubilisation, dewaterability and digestion perfomances. Pre treated stabilization processes improved anaerobic digestion in terms of volatile solids reduction and biogas production, but digestate dewaterability worsened. Fluorescence In Situ Hybridization FISH quantification showed an increase of methanogens consistent with the increase of biogas produced. Aerobic post treatment, on the contrary, had a beneficial effect on the dewaterability and the stability of the digested sludge even if with a reduction of the potential energy recovery. Published version 1st International IWA Conference on Holistic Sludge Management Vasteras, Sweden 05/2013 Internazionale Contributo Presentazione andrea.gianico GIANICO ANDREA |
