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- W1991446131 abstract "The Rya WWTP in Goteborg, Sweden is a highly loaded activated sludge plant which has been upgraded to remove nitrogen and to increase the biologically treated flow by 33% to reduce bypassing. Severe site restrictions made it difficult to increase the plant area. This was solved using a compact process based on tertiary nitrification in trickling filters and recirculation to a highly loaded activated sludge unit for denitrification. The necessary volumes were achieved by expanding the plant upwards, thus making it possible to place the trickling filters a in part of the area occupied by the former aeration basins. The recirculation of trickling filter effluent made it necessary to double the secondary settler capacity. This was solved by retrofitting the existing settlers as stacked settlers with a second tray on top of the original basin. The considerations behind process selection and plant design and costs are described." @default.
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- W1991446131 date "1998-01-01" @default.
- W1991446131 modified "2023-09-28" @default.
- W1991446131 title "Upgrading for nitrogen removal under severe site restrictions" @default.
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- W1991446131 doi "https://doi.org/10.1016/s0273-1223(98)00287-x" @default.
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