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Settling Tank Desludging, Cleanup and Pumping

How to Pick a Pump for Cleaning Clarifiers and Settling Tanks. Common Questions Clients Have.

Settling Tank Pumps – Desludge and Cleanup

Settling Tanks, which are also referred to as basins or clarifiers are used in many industries such as mining, wastewater treatment and oil to allow particles suspended in the water column to settle out.  This creates a more purified product, but also leaves a layer of solids or sludge at the bottom of the tank, which needs to be removed.  

Common applications for EDDY Pumps and related terms. Settling basins, settling tanks, clarifiers, sedimentation ponds, sludge dewatering, desludging settling tanks and more.

The desludging of settling tanks and clarifiers has always been a very costly and timely process.  Often plants bring in vacuum trucks which are very costly and take a lot of time to suck out all the sludge.  This is also a dangerous option as it exposes personnel too often toxic material located in the settling tanks.  Other options are to utilize centrifugal pumps, which pump very low percent of solids and often get clogged by all the debris. More about grit pumping and why EDDY Pumps beat centrifugal pumps HERE.

EDDY Pump Corporation recognized this problem and has created two solutions which save the client money and time while significantly reducing any safety issues.  

For cleaning out sludge in smaller clarifiers EDDY Pump utilizes a submersible electric or hydraulically driven pump with a water jetting system and a recirculation system.  When dealing with sludge removal in larger settling basins, a remote operated dredge is utilized.   

To pump out smaller clarifiers, EDDY Pump has designed a hydraulic or electric submersible pump that can be deployed directly into the basin.  The pump has a high-pressure water jetting ring that breaks up the material to increase the percent of solids being pumped.  To even further increase the solids and lower the time needed for clarifier cleanout, the pump system incorporates a recirculation valve that premixes the sludge and then allows for a higher production of cleanout.  This system has the capability of pumping out the clarifier at rates of 75 to 350 cubic yards of material per hour and pumping it distances over 5000-ft.

EDDY Pump design specializes in solids handling. Less water in the process results in greatly reduced transportation cost of waste.

For larger settling tank desludging projects, EDDY Pump has designed a remote operated submersible dredge known as the Subdredge. The client can input the dimensions and bathymetry of the tank into the operator’s controls and then the Subdredge can be lowered down into the tank.  The operator is then able to precisely maneuver the Subdredge through the tank while pumping the sludge.  The Subdredge is outfitted with GPS and acoustical positioning so that its location is always known by the operator and what sections of the basin have had sludge removed.   The Subdredge is available in sizes of 4-inch, 6-inch, and 10-inch pumps and weighs between 4000lbs – 12,000lbs. Production rates of over 400 cubic yards of sludge per hour, while pumping it over distances of miles.  Full details about the Subdredge HERE. 

Call to discuss your specific application.

Grit Pump for WastewaterGrit, sludge, sediment pass with ease. The arm of an adult can fit through a fully assembled EDDY Pump


Photos of the large scale clarifiers EDDY Pump would be used for.

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Settling Tank Cleanup Pumps

Grit Pump for Wastewater

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Why EDDY Pumps Are Better – Highlights

This video shows how EDDY Pump transports high slurry and abrasive materials. Featured dredge pump equipment includes the Remote Operated Subdredge, Diver Operated Pump and a Excavator Attachment Dredge Pump.

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