Tramfloc, Inc. - Belt Press, Flotation Units for FOG Removal, Clarifiers

Weighed down with heavy oil and grease removal problems? OR-TEC has a simple and extremely cost effective solution: Our HF Series Flotation System. The HF Series is uniquely designed for the removal of fat, grease and suspended solids from food, industrial and municipal wastewater. It automatically isolates these materials from the liquid waste, making them suitable for separate disposal while increasing plant performance. The removal of these materials greatly decreases pollution loadings and makes the effluent suitable for disposal to public sewers. In addition, the high oxygen transfer rate facilitated by the special aerator provides for oxidation of sulfides.

OR-TEC HF Series models are available for flow rates up to 660 gals/min. Special designs for higher flow rates can also be provided.

NOT required with the HF Series Flotation System:

Air compressors
Recirculation pumps
Pressure vessels
Complicated pressure and flow controls

Leaving you with:

No blocking problems
Streamlined running costs
Reduced capital costs
Maximized performance
Low maintenance

Typical Process Description

The Flotation System will include the following items:

Flocculation System (For chemical/effluent mixing, coagulation and flocculation)

Aeration Zone (for aerating, mixing and fusing the air bubbles to the flocculation waste stream)

Flotation Zone (to ensure sufficient retention to allow for separation and flotation of solid material from the waste stream)

Solids Discharge Scrapers (to direct the skimmings to the auger discharge)

Discharge weir and channel (for final effluent)

Chemical addition starts with coagulation dosing at the discharge of the FF pumps. As waste enters the flocculation system chemical dosing occurs, creating a large flocculation which is necessary for flotation. The flocculation system is fitted with a variable speed flocculator which secures mixing of waste flow and chemicals.

Next, the effluent enters a baffled aeration section. This aerator is the heart of the system and its unique design enables the production of very fine micro bubbles. These bubbles attach themselves to solid particles and float to the surface of the aeration tank. The effluent overflows a weir into the flocculation tank where the floated solids remain on the surface and the clarified effluent is discharged via a submerged pipe. Floated solids are periodically removed by a scraping mechanism which moves along the surface of the liquid and deposits the solids into the discharge auger. This scraper is controlled by a timer mechanism that can be set to provide the most suitable scraping frequency. Effluent in the aeration tank is recycled continuously back to the aeration tank by means of the aerator action along open pipes.

Solids removed by the scraper mechanism are transferred to an auger which in turn deposits the solids into a suitable container for disposal. Settled solids are removed with the action of the bottom scraper along the floor of the flotation zone. The sludge is transferred to a hopper on the bottom of the tank.

Treated effluent flows from the flotation zone via pipes to a double weir chamber. The double weir chamber minimizes the no-flow to maximize flow level in the flotation zone. This ensures that the top scrapers are effective at all times if needed. From the weir chamber, the flow will discharge to the outlet chamber and, from there, to the city sewer.

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Last updated April, 2008

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