Record Display for the EPA National Library Catalog


Main Title Recommended practice for flow measurement in wastewater treatment plants with venturi tubes and venturi nozzles /
Author Kulin, Gershon.
Publisher Municipal Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Year Published 1984
Report Number 78-D-X0024-1; EPA-600/2-84-185
Stock Number PB85-121663
OCLC Number 17968160
Subjects Flow meters ; Sewage disposal plants--Equipment and supplies
Additional Subjects Flow measurement ; Sewage treatment ; Venturi tubes ; Nozzles ; Acceptability ; Activated sludge process ; Sludge digestion ; Performance evaluation ; Calibrating ; Errors ; Sewage treatment plants ; Venturi nozzles
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-2-84-185 Headquarters Library/Washington,DC 03/05/2012
NTIS  PB85-121663 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation vi, 56 p. : ill. ; 28 cm.
Venturi tubes and venturi nozzles are suitable for in-plant flow measurement of raw influent, treated effluent, return activated sludge, certain digested sludges, and for air and gas flows. However, they are not generally recommended for measurement of raw primary sludge. For classical venturi tubes which operate under optimum prescribed conditions, the primary-element discharge coefficient is predictable to within a basic uncertainty of about 1 percent. For standard venturi nozzles this basic uncertainty ranges from about 1 percent to 2 percent. Errors in the secondary system must be considered in addition to estimate the uncertainty of the output measurement. However, non-standard tubes and/or installations may require an initial field calibration of the primary-element coefficient as well as the secondary system. The primary calibrations are described in section 11.3 and usually involve either volumetric or dilution methods, or comparison with a reference meter.
"EPA-600/2-84-185." "PB85-121663." "November 1984." "EPA 78-D-X0024-1." Includes bibliographical references.