Dosing pumps for drinking water and wastewater treatment

Bombas de dosificación para tratamiento de agua potable y aguas residuales

Peristaltic pumps are proven performers in drinking and wastewater treatment applications, chemicals and reagent dosing processes, in filter presses and sludge transfer operations.

Peristaltic pumps are an excellent solution for the pumping of abrasive, corrosive or viscous substances. Their lack of valves, seals and glands makes them inexpensive to maintain, with the only maintenance item been the hose or tube. Peristaltic pumps also have a gentle pumping action, ideal for shear sensitive polymers.

Peristaltic pumps are used to pump a wide range of fluids, from sterile to highly aggressive fluids and reagents, including ferric chloride, sodium hypochlorite, lime, caustic soda, powder activated carbon and polymers. Additionally, Verderflex Smart tube pumps can be interfaced with SCADA systems giving easy remote controlled dosing capabilities.

Peristaltic hose pumps can circulate slurry with SGs of 1.8 and above and they can also handle up to 80% solid solid content, maintaining high plant performance, unlike traditional pumps, which suffer from high downtime.

The peristaltic pump is based on alternating compression and relaxation of the hose or tube drawing the contents into the hose or tube, operating in a similar way to our throat and intestines. A rotating shoe or roller passes along the length of the hose or tube totally compressing it and creating a seal between suction and discharge side of the pump, eliminating product slip. Upon restitution of the hose or tube, a strong vacuum is formed drawing product into the pump.

The medium to be pumped does not come into contact with any moving parts and is totally contained within a robust, heavy-duty hose or a precision extruded tube. This pumping action makes the pump suitable for accurate dosing applications and it has a pressure rating up to 16 bar (hose) and 2 bar (tube).

Article published in: FuturENVIRO November 2014