Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Influence of sludge retention time on biomass characteristics and cleaning requirements in a membrane bioreactor for municipal wastewater treatment |
| Abstract | The study is aimed at defining possible correlations between sludge retention time (SRT), biomass growth, biomass activity and membrane cleaning requirements in a submerged membrane bioreactor (MBR). For the experimental campaign, a lab-scale MBR was continuously fed on pre-settled municipal wastewater and operated to obtain complete nitrification. Volumetric loading rate of 1.2 gCOD L-1 d-1 was maintained by fixing the permeate flux and diluting the influent wastewater as required. Experimental runs were performed adopting SRT of 20, 40, 60 and 80 days. Results were integrated with data from a previous experiment with complete sludge retention. A significant correlation between SRT and organic loading rate has been observed. Results of the respirometric measurements suggested that the biomass activity is weakly affected by the sludge age. Membrane cleaning requirements also appear to be scarcely dependent on SRT and on the average membrane cleaning was required about every 2 months. Further investigation of the sludge physical properties indicate that the capillary suction time can be considered as a suitable early warning parameter for the cleaning schedules. The findings allow the conclusion that SRT longer than 40 days could be considered for reliable operation of MBRs for municipal wastewater treatment. |
| Source | Desalination (Amst.) 236 (1-3), pp. 104–110 |
| Keywords | Membrane bioreactors; Sludge retention time; Biomass activity; Cleaning requirements |
| Journal | Desalination (Amst.) |
| Editor | Elsevier, Amsterdam, Paesi Bassi |
| Year | 2009 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.desal.2007.10.056 |
| Authors | LAERA G., POLLICE A., SATURNO D., GIORDANO C., SANDULLI R. |
| Text | 42372 2009 10.1016/j.desal.2007.10.056 ISI Web of Science WOS 000262908000015 Membrane bioreactors; Sludge retention time; Biomass activity; Cleaning requirements Influence of sludge retention time on biomass characteristics and cleaning requirements in a membrane bioreactor for municipal wastewater treatment LAERA G., POLLICE A., SATURNO D., GIORDANO C., SANDULLI R. Istituto di ricerca sulle acque, Viale F. De Blasio 5, 70132 Bari Universita di Bari, Facolta di Scienze MM.FF.NN., Via Amendola, 70100 Bari The study is aimed at defining possible correlations between sludge retention time SRT , biomass growth, biomass activity and membrane cleaning requirements in a submerged membrane bioreactor MBR . For the experimental campaign, a lab scale MBR was continuously fed on pre settled municipal wastewater and operated to obtain complete nitrification. Volumetric loading rate of 1.2 gCOD L 1 d 1 was maintained by fixing the permeate flux and diluting the influent wastewater as required. Experimental runs were performed adopting SRT of 20, 40, 60 and 80 days. Results were integrated with data from a previous experiment with complete sludge retention. A significant correlation between SRT and organic loading rate has been observed. Results of the respirometric measurements suggested that the biomass activity is weakly affected by the sludge age. Membrane cleaning requirements also appear to be scarcely dependent on SRT and on the average membrane cleaning was required about every 2 months. Further investigation of the sludge physical properties indicate that the capillary suction time can be considered as a suitable early warning parameter for the cleaning schedules. The findings allow the conclusion that SRT longer than 40 days could be considered for reliable operation of MBRs for municipal wastewater treatment. 236 http //www.sciencedirect.com/science/article/pii/S0011916408006322 Articolo pubblicato 2009_Desalination_236_1_3_104_110.pdf Articolo in rivista Elsevier 0011 9164 Desalination Amst. Desalination Amst. Desalination Amst. Desalination. Amst. Membrane science and desalination Amst. alfieri.pollice POLLICE ALFIERI giuseppe.laera LAERA GIUSEPPE TA.P07.002.002 Sviluppo di nuovi processi di controllo dell inquinamento idrico. TA.P07.002.004 Processi biotecnologici e processi a membrana |