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BAF begins deep down: 10 years of large scale biofilm nutrient removal in Oslo

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Abstract:

With space scarcely available, new nitrogen removal demands led VEAS to redesign their existing chemical precipitation phosphorus removal plant, without extending the footprint. Water retention times less than 3 hours, from inlet to outlet, was necessary to meet the new standards, 70 % total N-removal, 90 % BOD5 and 90 % total P-removal. The operational costs, including pumping in the main collection tunnel and final sludge distribution, are US$ 0.13/m3, or US$ 31 per connected person/year.

The selected solutions and some of the good and less good experiences during the more than 10 years of operation are shortly presented in this paper. Selecting solutions off the main road give many sleepless nights but with a sullen determination to succeed, the staff can achieve what they want. It all depends on dedication and the superior's willingness to stimulate their efforts and give them the necessary resources for solving the unexpected difficulties along the way.
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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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