Dynamic temperature changes in wastewater treatment plants
Abstract:Biological treatment processes, especially nitrification and denitrification, are very sensitive to temperature changes lower than 10°C. Short-term temperature changes occur frequently in many areas of the world, such as Northern Europe. To aid in the design and optimization of treatment plants, a dynamic model has been developed. The model predicts the hourly temperature in biological treatment tanks within 0.5°C over a 1-month period when the hydraulic residence times range between 12 and 36 hours. Use of the model requires only the initial temperature in the treatment tank, 6-hour values for the meteorological parameters, and the hourly influent temperature. The major finding is that the temperature variation is very dependent on local wind conditions, which can be modified by windbreaks or (more expensively) by tank covers. The model can be used for quantitative calculations in the design process to minimize temperature drops during cold weather periods and, thus, reduce the required tank volumes.
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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