Shivpad Engineers Pvt. Ltd,
#10, Vivekananda Street,
Balaji Nagar, Ambattur,
Chennai – 600 053.
Tamilnadu, INDIA.
Ph: +9144 2658 1277 | 2658 1288
 
Surface Aerators

SHIV PAD Surface Aerators are available for Municipal Sewage and Industrial waste water treatment applications. They are generally recommended for activated sludge process aerobic digestion or aerated lagoons as well as for pre-aeration.  The design of the equipment is on the prime objective to offer a mechanically trouble free equipment, while maximising oxygen transfer and mixing under a variety of conditions.

SHIV PAD  offers both Slow Speed fixed Type Surface Aerators and Slow Speed Floating Surface Aerators.  Oxygen transfer rages from 1.6 to 1.8 Kg / HP / hr at standard conditions.

SLOW SPEED FIXED SURFACE AERATORS IN OPERATION


 

SLOW SPEED FIXED TYPE 
SURFACE AERATORS TYPE SP-SA-1

The slow speed fixed type Surface Aerators have gear reduction between the motor and the impeller.  These units have no mechanical complications and are more preferred than other types of Aerators since they produce lesser shearing of the biological floc which is an important aspect to be considered for process requirement.

SHIV PAD Surface Aerators are available in range from 3 HP to 75 HP. The number of impeller blades is varied with the rating of the aerator.  The impellers are dynamically balanced for optimum performance.






SLOW SPEED FIXED SURFACE AERATORS INSTALLATION

The aerator impellers of SHIV PAD are in both Conical vane type and pitch blade design and these perform by drawing the bulk liquid towards the impeller and dispelling it upwardly and outwardly with minimum energy dissipation. The liquid is dispersed through the air as fine droplets.  This results in an increased interfacial surface  areas per unit volume of the liquid enhancing entrainment of air, as the rate of oxygen transfer is directly proportionate to the interfacial surface area. The fine droplets with the entrained air fall back to the bulk fluid and are circulated below the surface.  Air and oxygen transfer occur both at the surface of the droplet and at the surface of the bulk liquid.

Also the aerator provides effective mixing to keep the bio mass  in suspension throughout  the aeration tanks and lagoons.Every unit is provided with a facility to adjust the impeller submergence level in field to ensure the performance with maximum efficiency.  In case of fixed type Surface Aerators, mechanically the impeller level can be adjusted by a jacking arrangement for raising or lowering the drive base whereas floating aerators have facility to adjust the impeller level by means of appropriate counterweight addition in floats.

SLOW SPEED FLOATING SURFACE AERATORS IN OPERATION
SLOW SPEED FLOATING SURFACE AERATORS TYPE SP-SA-2
 

SLOW SPEED FLOATING SURFACE AERATORS
TYPE SP-SA-2.

The Slow Speed Floating Surface Aerators are similar to the Slow Speed Fixed Surface Aerators as far as the main drive and impeller assemblies are concerned.  The total assembly is mounted on a float rig frame which is located in the aeration tank or lagoon by mooring ropes.

The Pontoons are filled with high density polyurethane foam and sealed from the environment.  The Floating Aerators are mostly considered in tankages where the liquid level is not constant and varies from time to time depending upon the process.  Or where a rigid support would be impractical .
 
SHIV PAD   Floating Aerators are also available in ranges from 3 HP to 75 HP.  All these machines are factory assembled for ease of erection and adjustment in field.  Depending upon process need and user’s requirement, various options are made available for material of construction.

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