Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Role of mesh pore size in dynamic membrane bioreactors |
| Abstract | Two identical bench-scale Self-Forming Dynamic Membrane BioReactors (SFD MBR) were set-up and operated for the treatment of real urban wastewater. The two bioreactors were equipped with meshes of different mesh pore size. Meshes having pore size values of 20 and 50 µm were tested under solid retention time (SRT) of 15 d, whereas meshes with 50 and 100 µm pore sizes were compared under SRT of 50 d. The results of long-term experiments showed very good overall performances by all systems at the steady state. High flux (in the range 61-71 L m h) and very good effluent quality were obtained, with average suspended solids and chemical oxygen demanding values below 10 mg L and 35 mg L, respectively. The mesh pore size did not have a major influence on the average cleaning frequency. However, the pore size affected the effluent quality in correspondence of two particular conditions: (i) immediately after mesh cleaning; and (ii) during operation under high suction pressures (mesh clogging not promptly removed through cleaning). Moreover, the mesh cleaning frequency was observed to be dependent on the SRT. In tests with 50 d SRT, the cleaning requirements were very low (one every five days), and this limited the influence of the mesh pore size on the effluent quality. In conclusion, in SFD MBR, the role of the mesh pore size on the effluent quality may be more or less relevant depending on the operating conditions that directly influence the Dynamic Membrane formation. |
| Source | International journal of environmental research and public health (Print) 18 (4), pp. 1–13 |
| Keywords | Biological processMembrane BioReactorMesh filtrationPore sizeWastewater treatment |
| Journal | International journal of environmental research and public health (Print) |
| Editor | MDPI,, Basel, |
| Year | 2021 |
| Type | Articolo in rivista |
| DOI | 10.3390/ijerph18041472 |
| Authors | Vergine, Pompilio; Salerno, Carlo; Casale, Barbara; Berardi, Giovanni; Pollice, Alfieri |
| Text | 444700 2021 10.3390/ijerph18041472 Scopus 2 s2.0 85100353047 Biological process Membrane BioReactor Mesh filtration Pore size Wastewater treatment Role of mesh pore size in dynamic membrane bioreactors Vergine, Pompilio; Salerno, Carlo; Casale, Barbara; Berardi, Giovanni; Pollice, Alfieri Water Research Institute of the National Research Council of Italy IRSA CNR Two identical bench scale Self Forming Dynamic Membrane BioReactors SFD MBR were set up and operated for the treatment of real urban wastewater. The two bioreactors were equipped with meshes of different mesh pore size. Meshes having pore size values of 20 and 50 µm were tested under solid retention time SRT of 15 d, whereas meshes with 50 and 100 µm pore sizes were compared under SRT of 50 d. The results of long term experiments showed very good overall performances by all systems at the steady state. High flux in the range 61 71 L m h and very good effluent quality were obtained, with average suspended solids and chemical oxygen demanding values below 10 mg L and 35 mg L, respectively. The mesh pore size did not have a major influence on the average cleaning frequency. However, the pore size affected the effluent quality in correspondence of two particular conditions i immediately after mesh cleaning; and ii during operation under high suction pressures mesh clogging not promptly removed through cleaning . Moreover, the mesh cleaning frequency was observed to be dependent on the SRT. In tests with 50 d SRT, the cleaning requirements were very low one every five days , and this limited the influence of the mesh pore size on the effluent quality. In conclusion, in SFD MBR, the role of the mesh pore size on the effluent quality may be more or less relevant depending on the operating conditions that directly influence the Dynamic Membrane formation. 18 Published version https //www.mdpi.com/1660 4601/18/4/1472 31/01/2021 Articolo in rivista MDPI, 1661 7827 International journal of environmental research and public health Print International journal of environmental research and public health Print Int. j. environ. res. public health Print International journal of environmental research and public health. Print barbaracasale CASALE BARBARA alfieri.pollice POLLICE ALFIERI giovanni.berardi BERARDI GIOVANNI pompilio.vergine VERGINE POMPILIO carlo.salerno SALERNO CARLO |