Category: Flotation Units

Sizing Dispersed Gas Units

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It can be shown mathematically that an efficient design must have a high gas induction rate, a small diameter induced gas bubble, and relatively large mixing zone. The design of the nozzle or rotor, and of the internal baffles, is thus critical to the unit’s efficiency. As measured in actual field tests, these units operate …

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Dispersed Gas Units

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In dispersed gas units gas bubbles are dispersed in the total stream either by the use of an inductor device or by a vortex set up by mechanical rotors. Figure 7-14 shows a schematic cross section of a unit that employs a hydraulic eductor. Clean water from the effluent is pumped to a recirculation header …

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Dissolved Gas Units

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Dissolved gas designs take a portion of the treated water effluent and saturate the water with natural gas in a contactor. The higher the pressure the more gas can be dissolved in the water. Most units are designed for a 20 to 40 psig contact pressure. Normally, 20% to 50% of the treated water is …

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