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Experience with biological nutrient removal at low temperatures
- Article from:
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Water Environment Research
- Article date:
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July 1, 2000
- Author:
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Copyright informationCopyright Water Environment Federation Jul/Aug 2000. Provided by ProQuest LLC. (Hide copyright information)
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ABSTRACT: Operating experience for the first enhanced biological phosphorus (EBPR) and biological nutrient removal (BNR) plant in Norway are summarized. The primary objective during the first years of operation was to remove phosphorus at low temperatures both in an EBPR mode and a BNR mode. Enhanced biological phosphorus removal was accomplished at 5 C with 0.6 mg/L total phosphorus in the effluent, and BNR was achieved at 6 to 8 C with an average of 0.25 mg/L phosphorus and 5.3 to 9.6 mg/L nitrogen in the effluent. Solids were separated by gravity settling only. Sufficient solids retention time resulted in biological phosphorus and nitrogen removal at low temperatures with two-thirds of ...
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