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Institutional Repository [SANDBOX]
Technical University of Crete
Technical University of Crete
EN
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| URI: | http://purl.tuc.gr/dl/dias/B77C9B1E-04E9-467A-90AB-57BBC7989636 | ||
| Year | 2009 | ||
| Type of Item | Peer-Reviewed Journal Publication | ||
| License |
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| Bibliographic Citation | E. Dialynas and E. Diamadopoulos, "Integration of a membrane bioreactor coupled with reverse osmosis for advanced treatment of municipal wastewater," Desalination, vol. 238, no. 1-3, pp. 302-311, Mar. 2009. doi: 10.1016/j.desal.2008.01.046 https://doi.org/10.1016/j.desal.2008.01.046 | ||
| Appears in Collections |
This work investigated the evaluation of a pilot-scale membrane bioreactor (MBR) system in combination with a reverse osmosis (RO) unit. The MBR treatment with biomass concentration (MLSS) of 5 mg/L provided a high level of treatment for primary municipal wastewater. The removal of SS reached 99.99% resulting in a MBR effluent with SS levels below 1 mg/L. This demonstrated excellent solids separation achieved by the UF membrane. Similar removal levels were achieved for turbidity (99.72%). The average COD removal was 97.3% resulting in an effluent with COD ranging between 8–32 mg/L. However, relatively low total nitrogen removal (TN) was achieved with a most likely mechanism for nitrogen removal nitrogen assimilation in the biomass. Heavy metal removals were very high: Pb and Ni were removed completely, indicating that these two metals were in particulate form, while Cr and Cu were removed by 89% and 49%, respectively. Combination of MBR and RO provided a superb quality effluent devoid of heavy metals and with very low organic matter concentration (DOC level below 4 mg/L). Yet, TN removal was not complete, resulting in a TN concentration around or less than 20 mg/L.
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