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Criteria for nitrification and denitrification of high-strength wastes in two upflow submerged filters

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Design criteria for nitrification and denitrification of high-strength wastewaters are presented in two upflow submerged filters in series. Oxygen was a very important parameter effecting the ammonia removal rate in nitrification. The half-order and zero-order rate constants for nitrification were determined for the dissolved oxygen ranges of 2 to 3 mg/L and 4 to 5 mg/L, respectively. The transition from ammonia to oxygen rate limitation occurred at a bulk oxygen:bulk ammonia ratio of approximately 2.5 to 4, showing that nitrification was oxygen limited for practical purposes. In nitrification nitrite accumulation reached a considerable degree at bulk oxygen:bulk ammonia ratios lower than 5. Also, in denitrification the half- and zero-order rate constants were determined. The nitrite produced in the nitrification stage could be successfully reduced in denitrification without causing any inhibitory effect.
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Document Type: Research Article

Publication date: 1995-03-01

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  • Water Environment Research (WER) is published monthly, including an annual Literature Review. A subscription to WER includes access to the latest content back to 1992, as well as access to fast track articles. An individual subscription is valid for 12 months from month of purchase.

    Water Environment Research (WER) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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