Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Application of sequencing batch membrane bioreactors (SB-MBR) for the treatment of municipal wastewater |
| Abstract | Sequencing batch membrane bioreactors can be a good option in up-grading small municipal plant and for industrial applications, maintaining some of the advantages of both original technologies (effluent quality improvement, flexibility and simplicity of realization, operation and control). In this study, the effects of volumetric exchange ratio (VER) and aeration/filtration strategy have been evaluated. Moreover, with the adoption of cycles shorter than 8 h, the opportunity of further simplification of the membrane operation has been tested by choosing a continuous filtration mode instead of the usual short cycle of permeation/relaxation. Two lab-scales MBR equipped with Zenon hollow fiber modules were fed on real primary effluent. For all tests, hydraulic retention time of 10 h and sludge retention time of 60 days have been adopted. Different cycles have been investigated, lasting between 1 and 8 h and all comprising an anoxic phase to allow for denitrification. Operation at low VER resulted in better effluent quality with no limitations to the denitrification phase. For VER >33% a pre-aeration step was required before effluent withdrawal for optimal ammonium removal. Moreover, VER appeared to have limited negative effect on sludge concentration and yield, while the membrane cleaning frequency slightly increased for increasing VER. |
| Source | Water science and technology 64 (2), pp. 391–396 |
| Keywords | continuous filtrationmembrane bioreactornitrogen removalSBRvolumetric exchange ratio |
| Journal | Water science and technology |
| Editor | IWA Publishing, London, |
| Year | 2011 |
| Type | Articolo in rivista |
| DOI | 10.2166/wst.2011.622 |
| Authors | Laera, G.; Jin, Bo; Lopez, A. |
| Text | 42451 2011 10.2166/wst.2011.622 ISI Web of Science WOS 000293272500012 continuous filtration membrane bioreactor nitrogen removal SBR volumetric exchange ratio Application of sequencing batch membrane bioreactors SB MBR for the treatment of municipal wastewater Laera, G.; Jin, Bo; Lopez, A. CNR; Univ Adelaide; Univ Adelaide; SA Water Corp Sequencing batch membrane bioreactors can be a good option in up grading small municipal plant and for industrial applications, maintaining some of the advantages of both original technologies effluent quality improvement, flexibility and simplicity of realization, operation and control . In this study, the effects of volumetric exchange ratio VER and aeration/filtration strategy have been evaluated. Moreover, with the adoption of cycles shorter than 8 h, the opportunity of further simplification of the membrane operation has been tested by choosing a continuous filtration mode instead of the usual short cycle of permeation/relaxation. Two lab scales MBR equipped with Zenon hollow fiber modules were fed on real primary effluent. For all tests, hydraulic retention time of 10 h and sludge retention time of 60 days have been adopted. Different cycles have been investigated, lasting between 1 and 8 h and all comprising an anoxic phase to allow for denitrification. Operation at low VER resulted in better effluent quality with no limitations to the denitrification phase. For VER >33% a pre aeration step was required before effluent withdrawal for optimal ammonium removal. Moreover, VER appeared to have limited negative effect on sludge concentration and yield, while the membrane cleaning frequency slightly increased for increasing VER. 64 Published version Articolo in rivista IWA Publishing 0273 1223 Water science and technology Water science and technology Water science and technology. Water sci. technol. giuseppe.laera LAERA GIUSEPPE antonio.lopez LOPEZ ANTONIO TA.P07.002.004 Processi biotecnologici e processi a membrana |