Environmental Engineering Reference
In-Depth Information
Pump
Battery
Heater
Batt.
Gen.
Generator
Liquid Sodium Metabisulfate
Outfall Test Site
Courtesy Nicole Peschel
Figure 7-1
Portable dechlorination metering installation
Water main discharges are constricted by a regulator valve or
gate valve and routed through a Venturi injector system. Dechlo-
rinating solution is drawn into the injector from a plastic con-
tainer, with the chemical feed rate controlled by a metering
valve. Venturi injector units should include a flowmeter installed
near the metering valve to measure the chemical feed rate (e.g., a
rotameter); a threaded fitting at the upstream end of the pipe to
attach adapters (e.g., reducing sections); and a fitting at the
downstream end of the pipe for attachment of flexible discharge
piping (e.g., a hose).
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