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2. Air Diffuser Cleaning
"TMR090 Series" is equipped with fine-bubble air diffusers, which significantly reduces the
daily cleaning operation of air diffusers compared to the coarse-bubble diffusers. Usually in
domestic wastewater treating cases, no operation change is required. However, in the
unlikely event of diffuser clogging, uneven air diffusion may cause membrane clogging and
elements damage in the worst case.
To prevent possible event of diffuser clogging, please check the value of air flow-meter and
pressure gage of the membrane air supply line regularly and check that the fixed amount of
air within the standard range is supplied. Also, check that the air is diffused evenly within one
module and also evenly among modules.
If extraordinary value of the air-flow rate or uneven diffusion is inspected, please clean the air
diffusers according to the following procedure:
Air diffuser cleaning procedure
(1) Repeat the operation of turning on and off the blower several times or increasing and
decreasing the blower air flow several times. This operation expands and contracts the
rubber part of air diffusers and thus removes the sludge on their surface. From a preventive
maintenance point of view, installation of automatic diffuser cleaning system is one way. If
the air flow rate or uneven diffusion is not resolved with this operation, please try the next
action described below.
(2) Lift the module and take it out of the tank to the safety and steady place. Gently scrub the
diffusers with a brush or use pressured water to remove the contamination from their surface.
Generally, the diffusers can be cleaned with a tap water hose. If lime or other substance is
tightly stuck to the diffusers, use a high-pressure cleaner to remove them. The cleaning time
is five to ten seconds per air diffuser, though it depends on the contamination situation or the
water pressure.
(3) If the problem with the diffuser is not resolved with above procedure, please contact
Toray.
Be careful not to damage the rubber parts of air diffusers.
CAUTION
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