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DEFERUM Plant Overview

 

Due to the fact that the system uses floating particles to filter contaminants, it is less prone to clogging, requires much smaller filtration units and is exceptionally easy to backwash. It is, therefore, ideal for treating polluted water, whether from industrial and mining operations or from agriculture or domestic sources.

Developed by Mr. Alex Remizov, Director of Akvastroiservis, the system's Polymer Floating Filter Medium (PFFM) buoyancy causes it to arrange itself as a floating filter bed. Filtration is in the upward or downward direction, depending on application, with the 'bed' restrained by a fine mesh and supported by a grid. Gradual fouling of the bed increases its resistance, raising the water level in an adjacent 'hydro-robot' until it reaches the top of a siphon. This draws water out of the filtration chamber at such a speed that flow through the filter bed reverses, and the filter bed is backwashed. There are no sensors, electronic controls, floats or other moving parts to worry about.

During the backwash, the filter bed is expanded by 30 to 70% with the combination of the downward flow of filtrate and the upward buoyancy of the floating media producing a vigorous agitation and scrubbing effect. The tank for backwash water is only 15% of the size of that used in a conventional filtration system. We have a new design, patent pending, which has a zero backwash!

We offer systems which treat a very wide range of pollutants. Our AKV aerator/degasifier is, for example, is effective in the removal of both dissolved gases and high concentrations of iron. It oxidizes dissolved iron to a ferric state and then removes it via the filtration system.

The device comprises a set of ejection heads and vacuum chambers. Feed water is supplied at a pressure of three to four atmospheres and the velocity of water flow reaches 180km/h, creating a deep vacuum in the vacuum chambers. Dissolved gases are immediately released. The water flow sucks atmospheric air into the device, causing the water to break up and expose a surface area of up to 12,000m² where the release of dissolved gasses is greatly intensified. "The view is impressive," says Remizov. "The water appears to boil and turns as white as milk. Gases are removed in a fraction of a second".

It should be noted that these results are achieved without the use of additional equipment or the use of electricity. An aerator/degasifier installed on a ground water treatment plant removes dissolved gases and very high iron in a single pass. After filtration by our PFFM media, the iron is reduced to less than 0.3 mg/l.

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