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Biostyr?

Biostyr?
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For secondary treatment, after simple clarification or physical-chemical treatment; carbon removal, nitrification and denitrification are carried out in the same cell. The process requires a recirculation loop of the treated water to return the nitrates. Nitrification/denitrification after physical-chemical settling. BIOSTYR™ with two separate aerated The nitrate produced by the nitrification process in the aerated zone is recycled and converted into gaseous nitrogen in the anoxic zone, using clarified water as carbon source after physical-chemical settling. • Fully aerated BIOSTYR™: Thanks to the close monitoring of the dissolved oxygen in the system and fine control of the process air supplied, aerated/non aerated micro-zones are created around the beads. The nitrification and denitrification processes operate simultaneously on each bead. This configuration has the advantage of reducing the recycle rates by about 25%. after physical-chemical settling. For final treatment, after activated sludge, a nitrifying or nitrifying/denitrifying Post-denitrification is carried out in a non aerated medium at the end of treatment, when the elimination of nitrogen during the previous stage is inadequate to meet the overall level of nitrogen required. The denitrification process is used, by adding an external carbon source (methanol), to transform the excess residual into gaseous nitrogen, with a very high denitrification yield. Post-denitrification after nitrification/denitrification. Post-denitrification after nitrification/denitrification. after physical-chemical settling A whole host of advantages Advanced biological • The possibility of eliminating carbon and nitrogen within the same cell, • High concentration of biomass on the media, • Proven efficiency during high variations of load and flow rate. Highly efficient filtration • No final clarification is needed, • Excellent capture of suspended solids due to filtration in a direction which compacts the media rather than • Filtration rate between 6 and 30 m/h, • Automated biofilter control system Fewer nuisances • Ambient air only in contact with the treated water, • Used wash water, which is collected at the bottom of the biofilters, is not exposed An intelligent, compact design Floating media in conjunction with an upflow system, Easy access for nozzles maintenance with no need to Protection of components sensitive to clogging (nozzles in contact with treated water), Wash water reservoir in the top of the filters without a separate storage tank, Modular design of the aeration grid, depending High quality material for the BIOSTYRENE™ beads depending on the purpose of treatment, • High specific surface for biomass • Size and density adaptable to objectives. • Counter-current washing with the treated water, • Washing by "gravity flushing" which does not require a pump, • Automated washing. Solutions & Technologies 94417 Saint - Maurice Cedex - FRANCE Solutions & Technologies

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the advanced solution designed to meet the most stringent discharge quality standards for organic and/or nitrogen removal. Mastering advanced technology Veolia Water Solutions & Technologies has more than 20 years experience of supplying and operation BAFF (Biological Activated Flooded Filter) processes in the municipal wastewater and industrial markets. From this extensive experience we are able to offer our BIOSTYR™ process for applications ranging from carbonaceous Highly compact, BIOSTYR™ combines in a single structure the biodégradation of carbonaceous and nitrogenous pollution...

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