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Evaluation of Correlations for Zone Settling Velocity Parameters Based on Sludge Volume Index-Type Measures and Consequences in Settling Tank Design

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Abstract:

Determining zone settling velocity (ZSV) parameters for use in flux-theory analysis (design or operating charts) is time consuming. Correlations have been proposed for these parameters based on more readily obtained sludge volume index- (SVI-) type measures. A number of these correlations are reviewed, and their ability to predict ZSV parameters is evaluated. This assessment uses a model to generate SVI values from specified ZSV parameters. The SVI values are applied in correlations to generate predicted ZSV parameters that are compared to the specified ZSV parameters. Specified and correlation-generated ZSV parameters are used in the flux-theory design procedure to assess the difference in maximum allowable overflow rate.

Keywords: DILUTED SLUDGE VOLUME INDEX; FLUX THEORY; SETTLEABILITY; SLUDGE VOLUME INDEX; STIRRED SLUDGE VOLUME INDEX; ZONE SETTLING VELOCITY

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/106143096X122348

Publication date: November 1, 1999

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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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