7966 State Route 44
Ravenna OH 44266
Vogelsang provides positive displacement rotary lobe pumps and solids handling equipment for many wastewater and industrial applications. Typical wastewater applications for our sludge pumps and inline sludge grinders include:
Our pumps and grinders have been widely chosen for to feed dewatering equipment such as Belt Press, Centrifuge and Gravity Belt Thickeners. This is largely due to the pumps ability to deliver sludge to the equipment evenly with no pulsation. An even flow of sludge to the dewatering equipment helps the equipment run as efficiently as possible and with less polymer. Additionally, it's compact and easy to fit or retrofit onto the same skid as the detwatering unit itself.
Primary & Secondary Sludge
Primary & Secondary Sludge are typically where we find the heaviest concentration of grit and floatable non-organic debris in the wastewater plant. The solids content is usually low; typically 1%-3% solids. In this application, harder materials of construction are often chosen for the wet end along with abrasive-friendly elastomers for the lobes. Typical operation of a lobe pump in Primary Sludge is best if the pump pulls a constant low flow of sludge versus intermittent off-on operation.
Digested & Thickened Sludge
In these applications the operating pump can see light to medium abrasive so the right material of lobes are very critical. Digested sludge applications require low pulsation, as they typically feed to dewatering equipment. The lower the pulsation, the more accurate polymer dosage can be applied. Additionally, our grinders handle solids like hair and rags that may be difficult to pass by pumps not designed for solids handling.
WAS & RAS
Waste Activated Sludge requires the ability to pump varying viscosity sludge. Due to our HiFlo lobe design, we give you the most efficient positive displacement pump on the market. WAS & RAS sludge is typically mild as the majority of the grit has settled out. Some grit will remain but it is usually in lower concentration. The main challenge in pumping WAS or RAS is that it often contains high amounts of entrained air which can cause cavitation if the wrong flanges are installed. We overcome this using our gooseneck flanges, that keeps the pump primed and able to move the sludge through the pump without air locking.
Scum & Septage
Even though flows are typically pretty low, we often prefer to oversize the pump and run it slower to allow the pump to pass larger solids. Septage pumping can sometimes be the most difficult application in a wastewater plant, and normally ranges from .5-1% solids. Due to the way it's collected, it can contain grease, hard solids, hair, rags, and other solid wastes. Vogelsang pumps are able to pass large solids due to the large cavities in the lobe design.
DAFT applications are difficult not only because of the entrained air, but also the thickness of the sludge. Vogelsang pumps are designed for pumping viscous liquids containing heavy solids. A slower operating pump coupled with a wide range of available elastomers is critical. These applications require low speed in order to keep the pump from excess cavitation due to air pockets building in the cavities of the pump.
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