Record Display for the EPA National Library Catalog


Main Title Initial mixing in coagulation processes,
Author Stenquist, Richard J.
Other Authors
Author Title of a Work
Kaufman, Warren J.,
Publisher Sanitary Engineering Research Laboratory, University of California,
Year Published 1972
Report Number EPA R2-72-053
OCLC Number 00596809
Subjects Sewage--Purification--Flocculation ; Mixing
Additional Subjects ( Coagulation ; Mixing) ; ( Sewage treatment ; Coagulation) ; ( Flocculating ; Mixing) ; Performance evaluation ; Turbulent flow ; Alums ; Tubes ; Tracer studies ; Electrical resistance ; Chlorination ; Flow rate ; Applications of mathematics ; Chemical reactors ; Sewage flow rate
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA R2-72-053 c.1 Headquarters Library/Washington,DC 11/26/2013
ELBD ARCHIVE EPA R2-72-053 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ELBD RPS EPA R2-72-053 repository copy AWBERC Library/Cincinnati,OH 02/18/2020
ELBD  EPA R2-72-053 AWBERC Library/Cincinnati,OH 07/16/1999
Collation ix, 161 pages illustrations 28 cm.
Includes bibliographical references.
Contents Notes
This investigation was undertaken with the objective of determining the importance of the initial mixing step in water and wastewater treatment processes and determining whether increasing the rapidity of the initial mixing could improve process performance. The principal process considered was alum coagulation-flocculation of a kaolin suspension in water. the initial mixing device under consideration was a biplane, square-mesh grid of bars placed in a turbulent flow, tubular reactor; a 2-in. pipe was used in the present studies. Studies were made using a single electrode "point" conductivity probe and NaCl solution tracer to determine what parameters affect the mixing which occurs in the turbulent flow field downstream from a grid, and from these results a general mixing model was developed. The relation between initial mixing and process performance was studied by using two of the grids from the mixing studies as initial mixing devices in coagulation of a kaolin suspension.