Diffuser Cleaning - Mitsubishi STERAPORE 5700 Series Instruction Manual

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Diffuser Cleaning

This section describes the procedure for cleaning clogged SUS perforated pipe diffusers in modules to
eliminate clogging substances.
First, prepare the following protective clothing and tools.
 Helmet
 Safety belt
 Protective gloves
 Safety goggles
 13 mm wrench (For M8 bolts)
 Waste cloth
Follow the procedure below to clean the diffuser.
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Be careful not to damage the membrane.
As the modules are very heavy, when using forklifts and cranes, make sure that all apparatus is
inspected and certified, and all operators are certified.
Do not climb on the diffuser.
1. Lift the module and place it on a level, stable surface to prevent it from falling over.
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Take appropriate measures after lifting up the module, throughout cleaning, and until the
module is restored, such as setting up a fence to stop the module from falling into the tank, a
cover and danger markings.
Be careful when working on a concrete floor or iron plate as they may be slippery.
Confirm that appropriate steps have been taken to prevent wastewater from cleaning flowing
out of the premises.
Take steps to stop the module from falling over.
2. Remove the air and filtered water hoses, the flanges of the main pipe and the plug at its tip.
3. Remove the elements following the instructions in the separate "Element Replacement
Manual".
4. Flush accumulated sludge in the diffuser using a nozzled water hose or similar.
5. Visually inspect the inside of the diffuser after cleaning to confirm that the diffuser holes
are open.
6. Attach the flanges to the main pipe and the plugs to its tips.
Use sealing tape when attaching the plugs.
7. Attach the elements following the instructions in the separate "Element Replacement
Manual".
See "5-1-5 Installation" (p.35)
8. Connect the air and filtered water hoses.
9. Return the module to the tank and connect the filtered water pipes and diffuser pipes.
10. Perform aeration to confirm that the module is aerated uniformly from the top.
STERAPORE 5700 Series (FF) Instruction Manual
Chapter 8 Maintenance
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