NQA

Aeration & Oxygenation systems

Environmental & sustainable water treatment to save the planet

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Aeration in large tank or lagoon

 

Installation procedures  click here

 

Run an air ring main in 90 to 125mm pipe around the perimeter of the tank. The air ring main should be around  the top of the tank. Fit saddle clamps onto the ring main pipe and quick release snap couplers. Fit 4m of 1/2" hose onto the couplers and the 3m diffuser onto the end of the hose. The diffuser is then simply thrown into the tank or lagoon.  The diffusers have their own internal weight and there is no need to anchor them to the base of the tank.  The arrangement makes installation and maintenance very easy and it can be accomplished while the tank is full of water, indeed you can even carry out maintenance of the diffusers while the blowers are running.

 

Additional diffusers are fitted onto the air ring main at interval spacing of 2.0m to 5m.  The number of diffuser require will depend on the BOD loadings of the water and the degree of mixing required.

 

 

Diagram of an aeration system in a storm water lagoon, 800m x 200m

 

For the installation type below,  the air delivery pipe  is submerged below the water, and anchored to the base with weights.  The water depth is 4m, so 5m of hose is connected between the air pipe and the diffuser.  This arrangement means that you can hook the air diffuser hose and recover the diffusers for occasional cleaning.  The diffusers used should be code 6.2.10,  3m long diffusers 10 cubm/hr air flow fitted with non return valves.

 

 

 

Landfill site in Saudi Arabia

 

Lagoon aeration system Installation In Scotland

 

 

Photos of our aeration system installed in round tanks, approx 18m in diameter, with diffuser at 2m spacing around the circumference. There is good mixing in the tank without smashing the bacteria floc, biomass suspension is approx 3000 MLSS, 2 x 22kw air blowers power absorb approx 30kw for the complete system.  Oxygen demand average is 60kg/hr

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