Operation mode: Continuously or intermittent (not recommend for Silicone)
Materials:
Different rubber components for the special requirements of various waste waters are available. The most common materials are EPDM, a kind of rubber that is used for a long time in lots of variants in municipal waste water treatment plants.
Also silicone rubber can be used for fine bubble diffusers. But silicone membranes are more sensitive to all mechanical movements. Because of this reason, we are using special silicone compounds and also special diffuser designs.
For all these reasons, silicone membranes are a good alternative for the use in all waste waters which damage or destroy EPDM such as high concentrated grease, oil and hydrocarbons and should only be used there. For all waste waters with middle and low concentrated grease and oil it is also possible to use EPDM with low plasticiser content. The normal content of plasticiser is appr. 30%. It can be reduced to 15% for EPDM sleeves and to 10% for disc membranes.
Storage:
Diffuser and/or rubber sleeves must be stored factory-packed in a dark, dry, ventilated and dust-free storage space according to DIN 7716. Avoid frost, heat, UV/Vis-radiation, dust and working which can cause damage of diffuser and/or packing.
Do not store outdoors! The storage of rubber parts until installation/starting operation should not exceed one year. At on-site delivery all rubber and plastic parts must be stored in their original packaging.
Cleaning:
Diffusers can only be checked, if the activated sludge tank is out of work and empty. That is why normal cleaning must be done at work. Formic acid is used very successfully against carbonating. To keep the pores open, formic acid is sprayed into the compressed air for a short time. Also a regular use with maximum air flow for a short time helps keep the diffuser in good conditions for a long time.
Membrane lifetime:
Up to 10 years in municipal waste water treatment plants, depending on waste water influent and operation condition.
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