By American Water Works Association
Fluoridation is the addition of the chemical fluoride in ingesting water to lessen enamel decay. because fluoridation therapy turned universal perform over 50 years in the past, the teeth decay has been lowered forty to sixty five percent.
This guide presents information and assistance at the layout, operation, and upkeep of fluoridation platforms in water therapy. assurance comprises human well-being results of fluoride, calculating dosage, feed structures, deploy, operation, upkeep, and defluoridation
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Extra info for Water Fluoridation Principles & Practices
When such techniques are impossible, impractical, or inconvenient, some means for automatically adjusting the fluoride feed rate to the water flow must be provided. This automatic adjustment is called pacing. For small water plants, particularly those using a solution feed system, a watermeter contactor can be used to pace the feeder. A water-meter contactor is a switch geared to the water-meter movement so that it will make contact at specified intervals of flow volume. The impulse from the water-meter contactor, when received by the feeder motor, will energize the feeder in proportion to the meter’s response to flow.
The most generally applicable type is the platform scale, on which a solution tank, a carboy of acid, or an entire volumetric dry feeder can be placed. Although the scales can be specifically designed for the application, such as those supplied by manufacturers of volumetric dry feeders, in many cases an ordinary hardware-store scale will be satisfactory. Some minor modifications, such as removing the wheels or rotating the beam, may be necessary; but as long as the scales have sufficient capacity and sensitivity, there is no reason they cannot be used.
2. Connect the solenoid water valve to an electric outlet and turn on the water supply. The water level should be slightly below the overflow; if it is not, the liquid level switch should be adjusted. 3. Replace the intake float and connect it to the feeder intake line. The saturator is now ready to use. DESIGN, EQUIPMENT, AND INSTALLATION 41 4. The level of undissolved sodium fluoride should be visible through the translucent wall of the saturator tank. Whenever the level is low (one-half to one-third dissolved), add another 100 lb (45 kg) of fluoride.