Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | BIOMASS GROWTH AND ACTIVITY IN A MEMBRANE BIOREACTOR WITH COMPLETE SLUDGE RETENTION |
| Abstract | This work reports the main results of a bench scale membrane bioreactor operated for more than 100 days without sludge withdrawal and fed on real municipal wastewater. The experiments were oriented towards three main objectives. Firstly, the performance of the system was evaluated under two different volumetric loading rates (0.8 and 1.7 gCOD Lreact.-1 d-1). Secondly, biomass growth and accumulation of solids were assessed and a relationship between sludge concentration and volumetric loading rates was proposed. Thirdly, biomass activity was evaluated through respirometric tests, and endogenous and maximum respiration rates of heterotrophic and nitrifying bacteria were determined. The experimental campaign showed that these systems are easy to manage and very rapid to start-up. The SS concentrations under equilibrium conditions for both experimental periods were slightly lower than 10 times the volumetric loading rates, and the organic loading rates reached the same equilibrium value of 0.12 gCOD gTSS-1 d-1. Furthermore, under equilibrium conditions the system showed very limited sludge production (0.12g VSSg COD rem-1) and low biomass activity, although it readily responded to load variations. Further work is being carried out to evaluate the performance over the long term. |
| Source | Water research (Oxf.) 38 (7), pp. 1799–1808 |
| Keywords | Biomass activityComplete sludge retentionMembrane bioreactorsMunicipal wastewaterSludge yield |
| Journal | Water research (Oxf.) |
| Editor | Pergamon Press., New York, Regno Unito |
| Year | 2004 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.watres.2004.01.016 |
| Authors | POLLICE A., LAERA G., BLONDA M. |
| Text | 42227 2004 10.1016/j.watres.2004.01.016 ISI Web of Science WOS 000220501400016 Biomass activity Complete sludge retention Membrane bioreactors Municipal wastewater Sludge yield BIOMASS GROWTH AND ACTIVITY IN A MEMBRANE BIOREACTOR WITH COMPLETE SLUDGE RETENTION POLLICE A., LAERA G., BLONDA M. CNR Istituto di Ricerca Sulle Acque, Viale F. De Blasio 5, Bari 70123, Italy This work reports the main results of a bench scale membrane bioreactor operated for more than 100 days without sludge withdrawal and fed on real municipal wastewater. The experiments were oriented towards three main objectives. Firstly, the performance of the system was evaluated under two different volumetric loading rates 0.8 and 1.7 gCOD Lreact. 1 d 1 . Secondly, biomass growth and accumulation of solids were assessed and a relationship between sludge concentration and volumetric loading rates was proposed. Thirdly, biomass activity was evaluated through respirometric tests, and endogenous and maximum respiration rates of heterotrophic and nitrifying bacteria were determined. The experimental campaign showed that these systems are easy to manage and very rapid to start up. The SS concentrations under equilibrium conditions for both experimental periods were slightly lower than 10 times the volumetric loading rates, and the organic loading rates reached the same equilibrium value of 0.12 gCOD gTSS 1 d 1. Furthermore, under equilibrium conditions the system showed very limited sludge production 0.12g VSSg COD rem 1 and low biomass activity, although it readily responded to load variations. Further work is being carried out to evaluate the performance over the long term. 38 http //www.sciencedirect.com/science/article/pii/S0043135404000338 Articolo pubblicato 2004_Wat_Res_38_1799_1808.pdf Articolo in rivista Pergamon Press. 0043 1354 Water research Oxf. Water research Oxf. Water res. Oxf. Water research. Oxf. alfieri.pollice POLLICE ALFIERI giuseppe.laera LAERA GIUSEPPE massimo.blonda BLONDA MASSIMO TA.P07.002.004 Processi biotecnologici e processi a membrana |