Operation mode: Continuously or intermittent
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 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. This helps a lot to prevent diffuser damages by industrial waste water.
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/Visradiation, dust and working which can cause damage of diffuser and/or packing.
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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