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Municipal Wastewater

Over 45 years, the Muffin Monster® has come to symbolize uncompromised performance and technical leadership in municipal wastewater treatment. With more than 40,000 installations we have brought our experience to treatment plants in every corner of the globe.

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Legendary Performance Only a Monster Can Provide

Our Muffin Monster sewage grinders have become the first choice to protect vital sewage pumping stations and sludge system equipment. Our headworks screens are proven performers to protect vital treatment plant equipment from debris, and wastewater plants globally turn to our systems like Auger Monster® and Monster Wash Press for unique all-in-one packaged solutions for solids separation and dewatering. Let us help you find your Monster Solution.
Municipal Grind


We save you money: Muffin Monster’s quality performance not only allows you to spend time on what matters, it also helps you to avoid costly repairs. We offer customized solutions: Waste streams are different so your grinder cutter stacks should be too. JWC customizes solutions that fit to your needs and application. We protect your pumps: Our patented technology helps to protect downstream equipment, ultimately saving you money and hassle. We save you time: Our equipment helps prevent unplanned maintenance. We are reliable: Our patented technology is time-tested for the last 45+ years, and we stand behind our products. We ship fast: Who wants to wait 16 weeks for a grinder? Not us. That is why we ship our Muffin Monsters in two weeks*. * Applied to our most popular 10k and 30k Muffin Monsters, as well as cutter options.

Typical Applications

  • Airports
  • Corrections
  • Digestion and biogas
  • Facilities management
  • Food waste management
  • Headworks – primary treatment
  • Membrane bioreactors
  • Sewage pumping station
  • Septage and grease receiving
  • Sludge processing

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The World’s Leading Sewage Grinder For Over 40 Years

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Powerful High-Flow Wastewater Grinder For Pump Stations And Headworks