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Double Disc Pumps and Municipal Sewage Pumping

Positive Displacement Pump

For years, we have been asking wastewater treatment plants (WWTP) what they like about double disc pumps and what they don’t like. We have even been compiling a database with what regions of the USA and Canada have success with this type of pump for sewage and which areas have had more challenges.

One of the things that most WWTP’s say is that there has been limited competition in the specifications put out for bid by municipalities and consulting engineers working on wastewater projects. As we all know a monopoly in the pump industry is seldom a good thing for quality, innovation and of course pricing for pumps and parts.

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Food Waste to Energy Pumps: What You Should Know

Positive Displacement Pump 1

Our client is currently using progressive cavity pumps in a food waste to energy application. The problem is the seafood shells and other abrasive matter are destroying the rotors and costing the facility a fortune in repair costs. They are fed up and want another alternative. You were referred to us by another client who has used your plunger pumps with success for this application and suggested I call you.

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Pumping Wastewater in Nassau County

Positive Displacement Pump 2

Pumping wastewater in Nassau County NY poses unique challenges. First the county borders Long Island Sound to the North and the Atlantic ocean to the south which can bring variations in both weather and the types of wastewater that need to be pumped. Nassau County is home to over 1.3 million residents with a mix of suburban residents and vacation properties.

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Pump Industry News: Replacing a Komline Sanderson Plunger Pump

Positive Displacement Pump 4

Many of our wastewater treatment plant operators looking to upgrade their sewage pumps to the next generation plunger pumps have a wide set of options for a no piping change or little alternation to the existing set up. New sewage pumps can help make the facility more efficient and productive. This is available to Komline Sanderson and Carter Plunger Pump customers.

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How a Double Disc Pump Works

Positive Displacement Pump 5

We have all seen the outside of a double disc pump but rarely do we see what makes the pump actually work. Just to review, a double disc pump is a positive displacement pump that uses a trunnion (elastomer), a disc and a connecting rod to force sewage from the suction side to the discharge side of the pump by creating a vacuum inside the pump body. The valve chambers with the black check valves you see in the photo help to manage higher than normal concentrations of grit and solids in municipal wastewater.

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Orange County Waste Acceptance Facility Looks for Pump Solutions

Positive Displacement Pump 6

Orange county is home to dozens of resorts, hotels and theme parks which generate tens of millions of gallons of wastewater that needs to be treated every year. When an Orlando Florida renewable energy company earned a multiyear contract to accept waste from local resorts and theme parks, they needed severe duty pumps to transfer thick slurries and solids.

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Resolving Sewage Pump Problems at Smaller WWTP’s

Positive Displacement Pump 8

How to resolve sewage pumping problems at smaller WWTP’s is a question on the minds of thousands of operators worldwide. These facilities pump municipal sewage, storm water, melting snow, road grit and so much more for smaller communities. While the gallons per day pumped may not be as high as urban sewage treatment plants, the need for reliable sludge pumps is just as great. Wastecorp was contacted by a South New Jersey WWTP to provide upgraded sewage pumps to transfer wastewater, sludge and storm water from a smaller holding tank area. The pumps then transfer waste to both the facility’s lift station and digesters. The sewage pumps were also specified to unload local tanker trucks delivering everything from septic waste to waste trap grease and other solids laden liquids.

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Double Disc Pump Comparison: The State of the Double Disc Pump Business

Positive Displacement Pump 9

We have noticed that when a double disc pump for a WWTP upgrade or expansion goes to the planning stage and/or bid stage, we get calls from consulting engineers saying that the competition or their pump distributor makes noise that there should be no competition in the bid and essentially, the bid should be handed to the competitor. In America, we call this an attempt to create a monopoly. History has shown that monopolies are seldom good for competition in the pump business or any other business for that matter. History has also shown that monopolies in the United States aren’t looked at favorably by either regulators or the public.

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