Innovative treatment of screenings from fine screens
The HUBER Wash Press WAP liquid is the youngest member of the HUBER Wash Press family and has been developed especially for the treatment of screenings from fine screening systems.
The requirements the technical design of a wash press has to meet depend directly on the type of screening system that is used upstream of the wash press. The finer the screen separates, the more important it is to ensure that no solids flow back into the wastewater stream along with the press liquor from the wash press.
For manufacturing and process-technical reasons wash presses are usually designed with 3-5 mm apertures in the trough area. The use of such a wash press would therefore be not at all suitable for this project with a 1.5 mm perforated fine screen as also bigger solid particles would be passed back to the wastewater flow along with the press liquor and end up in the membrane plant. This would take the purpose of using a fine screen ad absurdum. It is neither a solution to return the press liquor to upstream of the fine screens as this would lead to an increasing concentration of solids and as a consequence impair the hydraulic efficiency of the screens.
We developed the HUBER Wash Press WAP liquid to have a best possible technical solution at hand for this purpose. A great advantage the HUBER Wash Press WAP liquid provides is that its aperture size in the trough area is adjusted to suit the upstream fine screen. The trough of the HUBER Wash Press WAP liquid for the Tarbes Ouest project is equipped with a perforated plate of also 1.5 mm to ensure that the high separation degree the fine screens achieve is not ruined by the downstream screenings treatment system.
At Tarbes Ouest HUBER's newest solids/liquid separation solutions for the protection of membrane systems have operated to the customer's full satisfaction for a year now.
Due to its unique design the HUBER ROTAMAT® Star liquid screen offers both high separation efficiency and high hydraulic throughputs.
As the screenings can be removed as "liquid" it is possible to efficiently transport them even if the distances between the screen and screenings treatment plant are very long.
The especially developed HUBER Wash Press WAP liquid allows for a screenings treatment that can be adjusted to optimally suit the fine screen system.
Innovation and quality win through
Due to the convincing benefits the new HUBER ROTAMAT® Star screen provides 50 machines of this type have already been sold. Many of them are already in operation, some have proven well in practice for as long as two years.
We are currently in the middle of the preparations for the manufacture of 12 HUBER ROTAMAT® Star screens with 2 m drum diameter and 1 mm perforated plate each. These screens will protect Europe's presently biggest membrane plant on STP Achères in France where the customer also relies on the high quality of HUBER machines!