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What aeration technologies are common and available in India?

What aeration technologies are common and available in India?

Ionic Water Technologies is preparing to enter the Indian water treatment market. We are an international water treatment and technology company providing low energy aeration systems, sustainable bioreactors for industrial and municipal water treatment needs. Our patented RCTS aeration system is used in wastewater aeration, metal precipitation processes, and environmental contamination treatment.

I would like to identify the most common existing aeration technologies, their energy requirements, and performance. In general the aeration component is the most expensive and energy demanding part of a treatment plant. Is there a program in India that retrofits existing treatment plants to improve capacity, performance and efficiency?

Thank you,
Matthew Setty
Ionic Water Technologies (




Dear Matthew,

The most common methods for aeration used in India are Surface and diffused aeration.

Surface aeration may be in the form of fixed or floating aerators. Fixed aerators are gradually being used less and less owing to their higher capital cost and recurring cost since they have to account for frictional losses as well. The capital costs are also high as they need to be fixed on a platform for placement in between the aeration tank.

Floating aerators have been found to be more suitable since they do not require any platform and also have the flexibility of operating in fluctuating water level conditions unlike their costlier brother. But floating aerators are best till about 25 hp after which it becomes better to use a fixed aerator for higher applications. Oxygenation may be derived from 1.5 kg-2.2 kg oxygen/kwh for surface aerators.

Diffused aerators have been best used in small capacity and compact plants owing to their advantage of remote air supply ability. They have been found to be cumbersome in medium and large plant applications since they require air grid and diffusers. Even after this, they need system for even air distribution in the aeration tank.

However, some plants by Degremont in India and some other parties in Pakistan have used them for large capacity applications; but they remain few and far between. Oxygenation may be from 1.2 kg- 1.6 kg oxygen /kwh from diffused aeration.

Kindly inform us about your technology and how it may be of use in India. Maybe we could be your prospective client. Kindly share the technology with us.

Taral Kumar
Akar Impex Pvt. Ltd., New Delhi


One of the most energy efficient systems are Submersible jet Aerators, though they are a bit costly, but the extra cost pays for itself over a period of 6 to 8 months in energy savings. They have an Oxygen Transfer Rate of 40 KGs/HP/Day.

You may visit our site : and look up Plant & Equipment
and look up Plant & Equipment

you may also mail us.
Keshav Agarwal

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