CHOPPER PUMPS

The World’s First Chopper Pump

Back in 1950, Landia's founder, Mr. Christian Oelgaard invented and patented the world’s first pump that could process and macerate the hard pebbles, long straw, and other dry matter found in thick slurry, and thereby prevent the potential cause of severe damage to the pump.

Landia’s chopper pumps, with its unique chopping system of fixed and rotating hardened steel cutters, are applied in a wide range of industries throughout the world, including wastewater treatment, food processing, biogas production (anaerobic digestion), agriculture, pulp and paper, and many other industries.

Landia has manufactured several thousands of these highly reliable chopper pumps in various designs over the past 60 years.

Multiple models and sizes

There are four basic models in our current range and these can be supplied in a choice of sizes and materials depending on the type of liquid to be handled and the required capacity:

• Submersible chopper pumps - fully submerged in the liquid to be pumped and/or macerated.
   
• Axial pumps (aka: recirculation pumps) - to be installed inside a pipe or in a channel, where they create flow (fluid motion).
   
• Long-shaft chopper pumps - only the casing with the knife system is submerged; the submerged parts are connected to the motor above the liquid level via a long vertical shaft.
   
• Dry-installed chopper pumps - installed outside the tank, and therefore easy to inspect and service. The liquid is moved to and from the pump in closed pipes.

Extremely long service lives

Landia’s pumps face demanding tasks in aggressive environments at wastewater treatment and biogas plants, in the agricultural sector and in a wide range of industrial processes, around the world every single day.

In spite of these harsh conditions, many of the pumps that Landia manufactured over 20 years ago are still running smoothly today.

Examples of areas of use

• wood pulp
• waste from the fishing industry
• waste oil containing metal chips
• cooling water containing solid particles
• manure containing sand and/or corn fibers
• biological and organic waste in biogas plants
• wastewater treatment plants with septic and active sludge
• feathers, bones, skin, hair, intestines and other abattoir waste
• domestic wastewater containing fat, soap and toilet wastewater

Brochure download (pdf) 

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