For Residential & Commercial Subdivisions please view our Large Packaged Pump Stations

Sulzer Muffin Monster

Monsters keep wipes away.

Muffin Monster™ sewage grinders represent the best-in-class technology for wastewater solids reduction. With over 35000 installations, the proven capabilities of the Muffin Monster is legendary in providing solutions for the ever more stringent operational needs arriving throughout the industry.



The 10K Series Muffin Monster is a compact grinder, tough on solids in sludge and sewage applications. It fits into areas with limited space requirements while still providing the necessary power for downstream protection. The 10K Series is an ideal, low-cost solution that goes beyond sludge grinding at resource recovery facilities. It fits perfectly into office buildings, apartment complexes, resorts, retails centers and package treatment plants.

  • Hex shafts: 50 mm
  • Motor: Standard 1.5 kW; 25:1 reducer
  • Cutter size: 120 mm diameter
  • Seal max working pressure: 6 bar

The 30K Series Muffin Monster is available as both inline and open channel configurations.
Troublesome solids are now easier than ever to reduce with the Muffin Monster dual-shafted grinder. Its slow speed, high-torque design shreds tough solids that typically cause sewer problems.

  • Hex shafts: 50 mm
  • Motor: Standard 2.2 kW; 25:1 reducer
  • Cutter size: 120 mm diameter
  • Seal max working pressure: 10.3 bar

The 40K Series Muffin Monster excels in wet and dry grinding applications. It is a powerful shredder for large processing systems. It also serves in many industrial applications including fish and beef processing, petroleum, pulp and paper mills, chemical plants, and recycling plants.

  • Hex shafts: 64 mm
  • Motor: Standard 7.5 kW; 35:1 reducer
  • Cutter size: 190 mm diameter
  • Seal max working pressure: 10.3 bar
  • Dual-shafted grinder
    • Dual-shafted, slow-speed, high-torque grinder easily shreds the toughest debris, including rocks, wood, wipes, hair, clothing, plastic and other debris
    • Capable of grinding a wider variety of solids than single-shafted machines, macerators, or chopper pumps
    • Grinding separates organic from inorganic materials in the waste stream
    Automated monitoring and controls
    • Protect pumps and other critical equipment from costly clogs and damage from tough solids
    • Auto load sensing and reversals reduce interrupts and optimize performance
    Wipes Ready™ technology
    • Wipes Ready Technology available which prevents materials from forming long strips and reweaving in the waste stream
    Compact and efficient design
    • Adapts to pipelines or channels with little or no modification
    • Custom stainless-steel frames allow easy installation in channels, wet wells and pump stations
    • Inline 30K Muffin Monster offers easy removable cartridge maintenance that allows for overhaul without removing the unit from the pipeline
    Lower operating cost
    • Clear pipes and pumps means shorter pump run cycles and lower electrical costs

The Muffin Monster sewage grinders are designed to protect pumps and other equipment by grinding down the toughest wastewater solids. Available in three different models each with two different configurations, they are suitable for applications such as:

  • Pump stations
  • Sludge processing
  • Correctional facilities
  • Headworks – primary treatment
  • Septage/Grease receiving
  • Airports

Muffin Monster™ – Combining pumps and sewage grinders to solve rising wastewater challenges

Technical data sheet – 10000 Muffin Monster® – Inline series

Technical data sheet – 30004T Muffin Monster® – Inline series

Technical data sheet – 40002 Muffin Monster® – Inline series

Your Insurance For Critical Stations

Muffin Monster sewage grinders are available with the unique Wipes Ready™ suite of technologies. It is designed to capture all wipes in the waste stream and shred them into small pieces that will not reweave into a ragball in sewage systems.

The Wipes Ready technologies applied in Muffin Monster sewage grinders are:

  • Wipes Ready cutters* – A combination of serrated cutters and knurled spacers cuts wipes in two directions. The result is smaller particles that cannot reweave downstream.
  • Delta P side rails* – Direct solids into the cutters without sacrificing flow rate and prevent debris build-up in the grinder
  • Optimized cut control (OCC)* – The OCC gear ratio optimizes shaft speeds to enhance the cutting action and cleaning of the cutters, which in turn improves the performance and life of the grinder.

Please note that different Muffin Monster models feature different Wipes Ready options.

* Patent pending















Reconditioning Muffin Monster Units