NEWSDESK
Qdos Pump doses for
three years without fault Successful trial leads to dosing pump orders for new water treatment plant
A Qdos 60 PU peristaltic pumphead from WatsonMarlow Fluid Technology Solutions has completed three years of maintenance-free operation without any leaks in a trial at the City of Oak Ridge water treatment plant (WTP) in Tennessee, US. The trial began inMay 2020 with the prototype Qdos 60 peristaltic pump with ReNu PU (polyurethane) pumphead dosing polyaluminiumchloride, a polymer used in water purification which enhances flocculation and coagulation of pollutants.
Throughout the period, there has been no need to stop production formaintenance downtime or to fix a polymer leak - which are expensive and time-consuming to clean up.
The Qdos 60 ReNu PU pumphead is specifically designed for polymer dosing, and has performed without requiring replacement, providing efficient, safe, leak-free and reliable polymermetering.
“The Qdos 60 pump that is used to feed coagulant - a polyaluminiumchloride polymer called DYPAC 5461 - and the prototype pumphead thatWatson-Marlow provided has been absolutely amazing,” said, plantmanagerMark Terry. “The pumps that were previously used to add coagulant into the plant’s raw water were old and prone to clogging. It was decided to use a Qdos 60 PU pump and there has been no disappointment with the performance.
“The Qdos 60 and ReNu PU pumphead was installed and began feeding the coagulant onMay 14, 2020. Other than when the plant has been down for a few hours for reasons such as temporary power outages, the Qdos 60 pump and the prototype pumphead has run non- stop for three years.
“Another Qdos 60 pump was purchased to act as a back-up but is has not been
18 needed,”Terry said.
The Qdos 60 PU offers precise and repeatable flows formany hard-to-handle fluids, including viscous fluids and aliphatic hydrocarbons, at linear flow rates of up to 60 L/h (15.8 GPH) and pressures of up to 5 bar (73 psi). The ReNu pumphead is a single, safely contained, component for rapid no-toolsmaintenance with no additional valves or ancillary equipment to fail or vapour lock.
“The obvious benefits that the Qdos pump has provided to the water treatment plant is no polymer leaks since it was put into service,” said Terry. “Aside fromoccasional calibrations, the pump hasmaintained a very consistent and accurate feed rate of the coagulant that is added to the raw water.
“Lowmaintenance and non-stop running of the Qdos pump at the plant is vitally
| July 2023 |
www.draintraderltd.com
important because, aside froma few unplanned episodes, it runs 24 hours a day, seven-days-a-week. Based upon these realities the Qdos pump has been a great choice.”
The benefits of the Qdos 60 PU include:
■ Excellent compatibility for complex polymers including polyacrylamide (PAM) and other flocculants and coagulants used in wastewater treatment
■ The contained pumphead design with integral leak detection reduces wastage
and eliminates operator exposure to chemicals
■ Precision dosing of ±1%, even under varying conditions,minimises chemical
expenditure
■ Low-shear, gentle peristaltic pumping protects polymer chains and consistency, maintaining product integrity
The Qdos 60 PU offers precise and repeatable flows for many hard-to-handle fluids
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