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11. Storage Products after Use
Please take the following steps to preserve the used “TMR090 Series” modules for a long
time until future re-operation.
(1) Drain the sludge in the membrane submerged tank.
(2) Clean the modules with clear water and wash out the remaining sludge on the module
surface as well as tank wall using hose. Never apply high pressure washing machine.
(3) Fill the clear water into the tank to let the modules completely submerged and maintain
its water level until the next start up.
(4) Periodical dosing of sodium hypochlorite helps inhibit the growth of algae/microorganism
during the storage, however hypo concentration in the tank has to be low (<50 ppm) to
prevent from possible damage to the module (stainless steel) by long-time exposure.
(5) In case aeration of the tank is required, its duration shall be short enough (<5 minutes
per hour) to avoid putting stress to membrane elements by “aeration without filtration”.
(6) Before re-commissioning of the modules, it is strongly recommended to conduct
chemical cleaning to the modules for the sake of removing biofilm grown on the
membrane surface and piping.
In case storage period is not long (within 24 hours), periodical sprinkling of water to modules
especially membrane surface and putting non-transparent sheet onto the modules for
protection against direct sunlight and wind are effective for creating wet condition of
membrane.
Keep the membrane wet once it gets wet with operation. If that
membrane gets dried up, its permeability may be decreased
seriously.
CAUTION
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