① Aeration density: the ratio of the surface area of the aeration membrane of the aerator to the service area.
(2) ventilation: the amount of air that each aerator fills into water in a unit time under standard conditions. Expressed as standard ventilation, maximum ventilation and minimum ventilation.
(3) Standard oxygen transfer rate (sotr): the amount of oxygen transferred by the microporous aerator to water with zero dissolved oxygen concentration per unit time under the test conditions of standard state (atmospheric pressure 0.1mpa, water temperature 20°c).
(4) Standard Oxygen Transfer Efficiency (sote): the ratio of the oxygen dissolved in water to the oxygen supplied by the aerator under the standard topic.
⑤ specific standard oxygen transfer efficiency (ssote): the percentage of dissolved oxygen per meter of water depth or the amount of dissolved oxygen per cubic meter of water depth under standard conditions (the gas is completely dry (zero humidity) and at 0 c and 0.1mpa).
⑥ Theoretical power efficiency (E): Under the standard state test conditions, the aerator consumes 1 kilowatt of useful work per hour to deliver oxygen to the water.
⑦ Resistance Loss (rl): Dynamic Wet Pressure Loss of Aerator under Standard Ventilation Rate. The greater the resistance loss of the aerator, the greater the power of the representative air blowing system or the number of air blowing systems increases, while the power consumption loss increases, which is related to the economic operation cost of the sewage treatment plant. Therefore, it is necessary to control the resistance loss of the aerator within the standard value.
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