| S.No. |
Surface Aeration System |
Fine Bubble System |
| 1. |
Power consumption is more. |
Power saving is 50% less. |
| 2. |
Requires regular maintenance. |
Trouble free operation |
| 3. |
Maintenance is not easy |
No or comparatively much easy maintenance is required. |
| 4. |
Standby arrangement is required, which proves to
be an expensive equation. |
No such standby arrangement is required. |
| 5. |
Initial cost is more. |
Initial cost is much less. |
| 6. |
In case a single Surface Aeration fails the complete
system is paralysed. |
No such effect is their in case a single or few
Fine membrane Diffusers fail and the system keeps on working
efficiently. |
| 7. |
Penetration of the Surface Aeration is limited
to upto a small depth, only. |
There is thorough aeration throughout the tank |
| 8. |
Standard Oxygen Transfer Efficiency (SOTE) is 1.2-3.1
Kg O2/Kwh, in case of Fixed Aerators and 1.2-2.2  , in case of Floating Aerator System. |
Standard Oxygen Transfer Efficiency ( SOTE) is
5.0-7.6 in case of Fine Membrane Diffusers. |
