Aeration in wastewater with 2 down method. Use compressed air into the blow pipe under the water distributed bubbles and another method. Should have done by the turbine bailer vit scoop up on the surface, then the blow down to the surface in the original place.With the strength of the electric motor, smaller than 2 horsepower. Or you may use the power flow. It should consider building a prototype. Then the installation was used in wastewater treatment in the phramongkutklao hospital and the glorious temple house Temple
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