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Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques

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Published on: March 12, 2019

Hindered and compression settling: parameter measurement and modelling.

A-E Stricker¹, I Takács, A Marquot

¹Environment Canada, Water Science and Technology Directorate, 867 Lakeshore Road, Burlington, Ontario, Canada. anne-e.stricker@ec.gc.ca

Water Science and Technology : a Journal of the International Association on Water Pollution Research

|December 14, 2007

Summary

This summary is machine-generated.

This study enhances the Vesilind settling velocity function for improved flux theory in wastewater treatment. New methods for parameter extraction and dynamic modeling address limitations in current settling analysis.

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Area of Science:

Environmental Engineering
Chemical Engineering
Fluid Dynamics

Background:

The Vesilind settling velocity function is crucial for flux theory in wastewater treatment design and modeling.
Existing methods have known shortcomings in accurately representing settling behavior across various scales and concentrations.

Purpose of the Study:

To propose and validate new methods for determining Vesilind parameters from batch settling tests.
To develop an extension for one-dimensional dynamic settler models to incorporate compression settling.

Main Methods:

Extensive batch settling tests were conducted at different scales.
Two novel methods for extracting Vesilind parameters were developed and compared to the traditional manual method.
A modified empirical function was proposed to extend 1-D dynamic settler models.

Main Results:

Slow stirring in settling cylinders is confirmed as essential for accurate representation of full-scale plant performance.
The proposed methods for parameter extraction showed effectiveness.
The extended 1-D dynamic model successfully described batch settling interfaces irrespective of layer count.

Conclusions:

The study provides improved methods for settling velocity analysis and dynamic modeling in wastewater treatment.
Accurate parameter determination and advanced modeling enhance the design and operational efficiency of settlers.