SCM TECNOLOGIE supplies aeration systems for basins at civil and industrial wastewater treatment plants.
These aeration systems are intended for biological wastewater treatment to ventilate fine-bubble compressed air in activated sludge basins.
Our membranes made of EPDM - rubber allow intermittent operations thanks to their long-term elasticity.


OPERATION MODE
Continuous or intermittent (not Silicone for tubes)

MATERIALS
SCM Tecnologie produces different rubber components for the special requirements of various wastewaters.
The most common material is EPDM, a kind of rubber that is used for a long time in Iots of variants in municipal wastewater treatment plants. Also silicone rubber can be used for fine bubble diffusers, but silicone membranes are more sensitive to all mechanical movements, that is why we are using special silicone compounds and also special diffuser designs. Furthermore, silicone is more expensive than EPDM, because of the material price.
For all these reasons silicone membranes are a good alternative to be used in all wastewaters which damage or destroy EPDM, such as high concentrated grease, oil and hydrocarbons and should only be used there.
For all wastewaters 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% and 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 wastewater.

STORAGE
Diffuser and/or rubber sleeves must be stored factory-packed in a dark, dry, ventiIated 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.
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. Crates exposed to direct sunlight must be covered with tarpaulin to protect against UVradiation.

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 sucessfully 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 keeping the diffuser at good conditions for a long time.

MEMBRANE LIFETIME
Up to 10 years in municipal wastewater treatment plants, depending on waste water influent and operation condition.

DISCLAIMER
This information is based on our present state of knowledge and is intended to provide general notes on our products and their uses. It should not therefore be construed as guaranteeing specific properties
of the products described or their suitability for a particular application.
Any existing industrial property rights must be observed. The quality of our products in guaranteed under our General Conditions of Sale.