Assessment of activated sludge, membrane bioreactors and vertical flow wetlands for upgrading sewage treatment works

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dc.contributor.authorLe Corre Pidou, Kristell
dc.contributor.authorDotro, Gabriela
dc.contributor.authorJefferson, Bruce
dc.date.accessioned2017-02-22T15:34:51Z
dc.date.available2017-02-22T15:34:51Z
dc.date.issued2016-11-29
dc.description.abstractThis paper demonstrates that utilising a vertical flow (VF) wetland after a conventional activated sludge (CAS) delivers equivalent or better effluent quality to a membrane bioreactor (MBR) based on a side-by-side pilot trial. The CAS was operated under the solids retention times (SRT) of 6, 12, and 20 days, with the effluent from each pilot plant fed onto a soil aquifer treatment column to better understand their water reuse application potential. Results showed an upgraded CAS + VF system could deliver effluents with median values of 34 mgO2.L–1, 7 mg.L–1 and 1.9 mg.L–1 for organics, solids and ammonia nitrogen, respectively, which were statistically similar to those from the MBR. Water reuse standards were achieved by the upgraded system for most parameters, with the exception of total coliform removal. The upgraded system delivered superior metal removal when compared to the CAS. An economic analysis showed upgrading a CAS with a VF wetland was more favourable than investing in an MBR system for example works of 5000 and 50,000 population equivalents if the VF system was operated at hydraulic loading rates of 0.03 m.d–1 and 0.08 m.d–1, respectively. This was delivered for a tenth of the carbon footprint of the MBR treatment.en_UK
dc.identifier.citationA. Besançon, K. S. Le Corre, G. Dotro & B. Jefferson, Assessment of activated sludge, membrane bioreactors and vertical flow wetlands for upgrading sewage treatment works. Environmental Technology, Volume 38, 2017 - Issue 2: 6th International Symposium on Wetland Pollutant Dynamics and Control (WETPOL) and the Annual Conference of the Constructed Wetland Association, pp154-162en_UK
dc.identifier.issn0959-3330
dc.identifier.urihttp://dx.doi.org/10.1080/09593330.2016.1260642
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/11476
dc.language.isoenen_UK
dc.publisherTaylor & Francisen_UK
dc.rightsAttribution-NonCommercial 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.subjectWater reuseen_UK
dc.subjectSolidsen_UK
dc.subjectNitrificationen_UK
dc.subjectMetalsen_UK
dc.subjectAquifer rechargeen_UK
dc.titleAssessment of activated sludge, membrane bioreactors and vertical flow wetlands for upgrading sewage treatment worksen_UK
dc.typeArticleen_UK

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