In the water treatment process. Aeration to be effective must transfer oxygen to the liquid for use by microorganisms to produce a floc and mixing the liquor, diffused aeration is effective method for aeration by means of porous diffusers installed at the bottom of the tank in the aeration process, oxygen transfer takes place by molecular diffusion through the interface film between air and liquid and it increases in proportion to the interface area for a given air flow, as the number of bubbles increase, the surface area increases and the rise velocity of bubbles decreases the diffused aeration transfer more oxygen to the liquid than mechanical aeration, e.g. diffuser emerging 2 mm bubbles presents six times more surface area to the liquid than coarse bubble aerator emitting 10 to 12 mm bubbles, also rise velocity is lower. Surface area and rise velocity of bubbles contribute to the higher oxygen transfer capacity of diffused acration system.

AIRFIN

The tabular diffuser Photograph THE SYSTEM AIRFIN consists of porous membrane, made of EPDM rubber, fully supported over the length and circumstance with 75 mm upvc pipe.

           The diffuser is retained in place by two hose clamps. It is filled to the pipe lateral by a PVC TEE or service saddle arrangement the laterals are connected to a pipe header. The wetted parts of system are made of non corrosive material. In the absence of airflow, the membrane contracts and covered around the PVC pipe to prevent any back flow. Tabular membrane is available in standard 1 MTR and ½ MTR magnum Units.

Technical Features

• Heavy-duty full membrane support
   

• All accessories are non-corrosive
   

• Factory assembled diffusers for ease of installation.
   

• System expansion in field without special toods.
   

• Partial and complete replacement systems available self-purging
   

• Fixed and floating design.
   

• Lightweight for ease of installation
   

• Self-purging

Advance Designed Diffusers

• Advance Diffuse Design EPDM
   

• EPDA, Styrene butadiene rubber and Specially engineered materials available
   

• Engineered pores for maximum efficiency
   

• Backflow prevention features
   

• The properties of material are tested by CIPET a reputed testing laboratory. Engineered membrane for minimum stress and maximum life.

Applications in Effluent Treatment Plant

The system can be used in various types of aeration process like.

1. Activated slugger system
    

2. Oxidation pond (Stabilization Pond)
    

3. Aerated lagoon systems
    

4. Aerobic Digresser Units
    

5. Intermittent (on/ ff) aeration.

Benefits

1. High oxygen transfer efficiency results in more BOD removal per Unit of energy.
    

2. Compatible with any basin or tank configuration and geometry, hence no need for regular shape and size of tank.
    

3. Permits deeper tanks, saving land requirement.
    

4. Gives uniform distribution of dissolved oxygen all over the tank.
    

5. The supply of air volume can be adjusted according to biological loads and flow
    

6. Adaptability of the system to existing pneumatic Circuits eliminates the need year.
    

7. Can be used to retrofit existing aeration system
    

8. Minimum piping for ease of installation and maintenance.
    

9. Purging of diffuser is not required
    

10. Low investment and operation Costs with minimum any easy maintenance.