Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Kinetic study of two-step mesophilic anaerobic-aerobic waste sludge digestion: Focus on biopolymer fate |
| Abstract | Kinetics of the sequential anaerobic-aerobic digestion operated under mesophilic conditions on waste activated sludge of a full-scale wastewater treatment plant was investigated. Special focus was given to the fate of proteins and carbohydrates, given the influence of biopolymers on dewatering properties of the sludge. Kinetic tests were performed to characterize the suspended solid degradation and the trend of biopolymers in both digestion steps. Volatile solid degradation rates were 0.93 and 0.52 kgVSm-3 d-1 in anaerobic and aerobic conditions, respectively. Different models (1st order, Michaelis-Menten, Valentini and Contois) have been compared for VS degradation: Contois equation provided the best data fitting (correlation coefficients >=0.99). Evolution of biopolymers during two-step process exhibited a similar pattern: during the anaerobic phase, an increase of about one order of magnitude was observed for carbohydrates and of 100% for proteins, while in the aerobic bioreactor both decreased of 29 and 73%, respectively. Data from kinetic tests were employed to model the biopolymer patterns taking into account their production from the hydrolysis of particulate organic substrate and their biodegradation in the different anaerobic and aerobic reaction environments. Michaelis-Menten equation gave satisfactory predictions of the biopolymer fate with correlation coefficients ranging from 0.92 to 0.97, for both carbohydrates and proteins. |
| Source | Process safety and environmental protection 118, pp. 106–114 |
| Keywords | Sludge stabilizationAnaerobic-aerobic sequential sludge digestionBiopolymersCarbohydratesProteinsKinetic modelling |
| Journal | Process safety and environmental protection |
| Editor | Elsevier Science, Rugby, Regno Unito |
| Year | 2018 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.psep.2018.06.008 |
| Authors | Mosca Angelucci D.; Di Cesare S.M.; Tomei M.C. |
| Text | 393640 2018 10.1016/j.psep.2018.06.008 Scopus 2 s2.0 85049340312 ISI Web of Science WOS WOS 000453939000010 Sludge stabilization Anaerobic aerobic sequential sludge digestion Biopolymers Carbohydrates Proteins Kinetic modelling Kinetic study of two step mesophilic anaerobic aerobic waste sludge digestion Focus on biopolymer fate Mosca Angelucci D.; Di Cesare S.M.; Tomei M.C. Water Research Institute, C.N.R., Via Salaria km 29.300, C.P. 10 00015, Monterotondo Stazione, Rome, , , Italy; Water Research Institute, C.N.R., Via Salaria km 29.300, C.P. 10 00015, Monterotondo Stazione, Rome, Italy Kinetics of the sequential anaerobic aerobic digestion operated under mesophilic conditions on waste activated sludge of a full scale wastewater treatment plant was investigated. Special focus was given to the fate of proteins and carbohydrates, given the influence of biopolymers on dewatering properties of the sludge. Kinetic tests were performed to characterize the suspended solid degradation and the trend of biopolymers in both digestion steps. Volatile solid degradation rates were 0.93 and 0.52 kgVSm 3 d 1 in anaerobic and aerobic conditions, respectively. Different models 1st order, Michaelis Menten, Valentini and Contois have been compared for VS degradation Contois equation provided the best data fitting correlation coefficients >=0.99 . Evolution of biopolymers during two step process exhibited a similar pattern during the anaerobic phase, an increase of about one order of magnitude was observed for carbohydrates and of 100% for proteins, while in the aerobic bioreactor both decreased of 29 and 73%, respectively. Data from kinetic tests were employed to model the biopolymer patterns taking into account their production from the hydrolysis of particulate organic substrate and their biodegradation in the different anaerobic and aerobic reaction environments. Michaelis Menten equation gave satisfactory predictions of the biopolymer fate with correlation coefficients ranging from 0.92 to 0.97, for both carbohydrates and proteins. 118 Published version http //www.scopus.com/record/display.url eid=2 s2.0 85049340312 origin=inward Kinetic study of two step mesophilic anaerobic aerobic waste sludge digestion Focus on biopolymer fate Pdf dell articolo Kinetic study of two step mesophilic anaerobic aerobic waste sludge digestion Focus on biopolymer fate Biopolymer fate PSEP_2018.pdf Articolo in rivista Elsevier Science 0957 5820 Process safety and environmental protection Process safety and environmental protection Process saf. environ. prot. Process safety and environmental protection. Transactions of the Institution of Chemical Engineers. Part B, Process safety and environmental protection domenica.moscaangelucci MOSCA ANGELUCCI DOMENICA mariaconcetta.tomei TOMEI MARIA CONCETTA TA.P07.002.005 Rimozione di composti xenobiotici da acque di scarico |