You are not currently logged in.
Access JSTOR through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Sludge Volume Index Settleability Measures: Effect of Solids Characteristics and Test Parameters
Christopher M. Bye and Peter L. Dold
Water Environment Research
Vol. 70, No. 1 (Jan. - Feb., 1998), pp. 87-93
Published by: Water Environment Federation
Stable URL: http://www.jstor.org/stable/25045011
Page Count: 7
You can always find the topics here!Topics: Activated sludge, Water pollution, Volume, Sludge, Parametric models, Test ranges, Correlations, Modeling, Wastewater, Velocity
Were these topics helpful?See somethings inaccurate? Let us know!
Select the topics that are inaccurate.
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
Sludge volume index (SVI) type activated-sludge settleability measures are used in the design and control of secondary settling tanks. Considerable confusion exists as to the best parameter and experimental technique to use. The common settleability measures (SVI, diluted sludge volume index, stirred specific volume index [SSVI], and SSVI at 3.5 g/L) are outlined. This discussion is used as the basis for commenting on the validity of these measures and their relation to zone settling velocity measurements. A simple mechanistic model is used to evaluate the effects of solids characteristics and test parameters on SVI-type indices. Solids settleability and compactability, settling column height, and solids concentration in the test have an interactive effect on the measured SVI. The applied model explains many of the artifacts associated with SVI and questions the validity of correlations for zone settling parameters based on SVI-type measurements.
Water Environment Research © 1998 Water Environment Federation