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Comparison of Oxygen-Transfer Measurement Methods Under Process Conditions

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The objective of this paper is to compare the following four methods of measuring oxygen transfer in wastewater treatment plants under process conditions: the offgas, hydrogen peroxide (H2O2), reaeration, and in situ oxygen uptake rate (OUR) methods. Comparative tests were performed under controlled conditions in a pilot column and in six full-scale oxidation ditches equipped with fine-bubble diffusers and slow-speed mixers.

The offgas and H2O2 methods give similar results (differences between the oxygen-transfer coefficients under field conditions [kLaf] from each method lower than 10%). The reaeration procedure gives more random results (differences from −5 to −43% compared with values obtained using the offgas method). The in situ OUR method, in the presence of a horizontal flow of mixed liquor, leads to an estimate of kLaf to within 15% of the offgas value.
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Keywords: ACTIVATED SLUDGE; FINE-BUBBLE AERATION SYSTEM; HYDROGEN PEROXIDE H2O2 METHOD; OFFGAS METHOD; OXYGEN TRANSFER; OXYGEN UPTAKE RATE METHOD; REAERATION METHOD; WASTEWATER

Document Type: Research Article

Publication date: 2004-03-01

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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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