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Diagnosis and Identification of Respirometer Dynamics and Sludge Kinetics in Continuous-Flow Respirometers

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This paper deals with excitation of respiration chamber dynamics in a continuous-flow respirometer with the objective of extracting additional information from its dissolved oxygen (DO) sensor readings. A measurement strategy is proposed from which it is theoretically possible to identify respiration chamber dilution rate, DO sensor dynamics, sludge kinetics, and short-term biochemical oxygen demand (BODst) concentration in the inflow to the respirometer. In extensive experiments with activated sludge fed with municipal wastewater, the method for identifying respiration chamber dilution rate and DO sensor dynamics proved successful and was illustrated to be useful. Finally, the results convincingly discourage further efforts to identify sludge kinetics and BODst from this type of experiment, despite the theoretical feasibility.
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Document Type: Research Article

Publication date: 2000-05-01

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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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