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Full-scale evaluation of biological nitrogen removal in the step-feed activated sludge process

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Establishment of nitrification and denitrification in an existing conventional, step-feed activated sludge plant designed for suspended solids and carbonaceous biochemical oxygen demand removal was evaluated in a full-scale study at the Tallman Island Water Pollution Control Plant in New York City. One of four biological treatment batteries consisting of an aeration tank and two rectangular secondary clarifiers was isolated from the rest of the plant and was used for the study. Nitrification rates and their temperature dependency were determined using NH3-N and NO3-N profiles developed along the aeration tank during the summer and winter months. The data suggested the occurrence of simultaneous nitrification and denitrification in the aeration tank. Virtually complete denitrification was observed within the sludge blanket of the secondary clarifier.
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Keywords: DENITRIFICATION; NITRIFICATION; RATE CONSTANT; STEP FEED

Document Type: Research Article

Publication date: 1996-03-01

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    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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