Mitsubishi STERAPORE 5700 Series Instruction Manual page 9

excess sludge from this tank.
④
Treated water tank
This is a tank used to store treated water. It sometimes serves as a dilution water tank. When
necessary, sodium hypochlorite is added to the water in this tank to disinfect it before it is discharged.
⑤
Chemical tank
This is a tank used to store undiluted NaClO used to clean modules. As high temperatures accelerate
the decomposition of NaClO, which produces chlorine, install the tank in a well-ventilated location that
is not exposed to direct sunlight.
⑥
Dilution water tank
This is a tank used to store water for diluting undiluted NaClO. Water that can be stored in this tank
includes public water such as city water, or treated water.
⑦
Permeate pump
This is a pump used to draw treated water out of the membrane module. A self-suction pump is
normally used for this purpose. It is possible to use an ejector, vacuum pump or other equipment that
removes air from pipes instead of a self-suction pump. Permeate pumps are operated at a constant
flow by installing a constant flow valve on the discharge side or controlling it using an inverter.
⑧
Return activated sludge pump (RAS pump)
The RAS pump is required to adjust the sludge concentration of the reactor and membrane tanks.
When using recycled nitrification, the pump also circulates nitrified water. The circulation volume is
determined primarily by the balance between the sludge concentrations in the reactor and membrane
tanks and the target nitrogen removal rate. It is generally about 1 to 3 times the volume of raw water.
⑨
Chemical pump
This is a pump used to deliver a constant flow of NaClO from the chemical tank.
⑩
Dilution water pump
This is a pump used to send water used to dilute NaClO from the dilution water tank. A metering pump
or constant flow valve is used to send a constant flow of dilution water.
⑪
Aeration tank blower
This is a blower used to supply air for biological processing to the aeration tank. Select a blower model
based on the volume of oxygen required for biological processing, water depth, pipe diffuser properties
and so on.
⑫
Membrane scour blower
This is a blower used to supply air used to clean modules. The blower model should be chosen
according to water depth, the air volume required for cleaning a modules (See p.エラー! ブックマーク
が定義されていません。 "エラー! 参照元が見つかりません。 エラー! 参照元が見つかりません。" ),
etc. If the same blower is used for both biological processing and membrane scour aeration, control the
volume of membrane scouring air so it remains constant at the designated value.
STERAPORE 5700 Series (FF) Instruction Manual
Chapter 1 MBR Composition and Placement
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