Chopper/sludge pumps (submerged) for wastewater

The DG-I pump is a series of submersible pumps, which are developed to pump heavily polluted wastewater and sludge with a high dry matter content. All DG-I pumps are fitted with a knife system at the pump inlet. The knives ensure smooth operation in conditions where many other pumps have problems with clogging.

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Use of the wastewater pump

The submersible chopper pump has several wastewater applications. As an example, the DG-I pump has proven to be a problem solver in pumping stations, where there is a large content of rags, wet wipes and other debris that would typically cause other pumps to have trouble operating. 
Landia’s pumps are designed to be able to pump liquids with high viscosity. This makes them extremely suitable for pumping wastewater sludge. For use in liquids that contain abrasive particles such as sand, we have developed specialty materials that can significantly extend the service life of the pump compared to a standard pump, resulting in lower long-term operating costs. If the pump is to be operated in more aggressive liquids, such as wastewater from dairies, we offer the pump in stainless steel. 

Case study about chopper pumps

Our models

Landia manufactured the Worlds’ first Chopper Pump in 1950, and today it is used in a wide range of applications in industries such as wastewater treatment, food processing, pulp and paper, bioenergy, aquaculture, oil and gas, etc.

The rugged design of the Landia chopper pump gives you a superior choice for the most challenging applications.
You get a pump that never gives up.

Breaking it all down
- without breakdowns!

And still ...
The undisputed Champion of the World



The sensible choice for your system

  • checkReliable equipment with a proven long lifetime of use gives you time to focus on other important things during the workday.
  • checkA safe investment – spare parts and service are always available directly from our US subsidiary located in North Carolina.
  • checkPersonal service guaranteed. We say what we do, and we do what we say.

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Our solutions within wastewater

Case studies - wastewater


A Better Blend

An automated mixing system helps an Illinois treatment plant improve biogas production and increase volatile solids destruction.

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New wastewater mixers reduce maintenance and improve health & safety

Following a highly successful upgrade to its wastewater process, Glatfelter, the leading global supplier of engineered materials, has made further investments in mixers made by Landia.

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Stalwart Submersible Mixers help Montana WWTP make big energy savings

When the small team at Daffy Hills Lane selected their new mixers as part of plant upgrade in 2004, they chose very wisely indeed – and not just because those same mixers are still dutifully working away today.

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Landia and Cambi help deliver big upswing in biogas production for the water industry

Just south of Aberdeen, improvements continue to be made at Scottish Water’s Sludge Treatment Centre (STC) in Nigg – but at a site still approaching its full potential, 0.9~1.0MW per tonne of Dry Solids is already being consistently produced.

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Greaseballs gone as new pumps get to work

Situated approximately halfway between two of America’s largest cities, Madisonville (population 4396) might not deal with the same mega volumes of wastewater that are treated in Dallas and Houston, but for its highly dedicated team, there is never any let up in their commitment to their city’s treatment plant.

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Forward dive for long-lasting Landia mixers at St Andrews

Following an intricate diving operation, ESD (the joint venture involving Galliford Try, MWH Treatment and Black & Veatch) has completed the successful upgrade of its mixing operation at Scottish Water’s Wastewater Treatment Plant (WWTP) in St Andrews, Fife.

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MSE Systems bring in Landia pumps & mixers to help treat potato effluent

Following the successful installation two years ago of Landia Chopper Pumps and a Landia Aeration System, MSE Systems is set to install a further three units from Landia for one of the UK’s leading supplier of potatoes.

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Poultry wastewater aerated as MSA bring Landia’s aeration equipment to Saudi Arabia

In the Kingdom of Saudi Arabia, Landia’s AirJet is playing a key role in the success of the aeration and wastewater system for a major poultry processor.

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Straight-Shooting Chopper Pumps Hit the Target in Gun Barrel City

At the wastewater treatment plant in Gun Barrel City, Texas, sewage first enters an equalization tank before it actually goes to the site’s bar screens.

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New Poultry Wastewater installation taken care of by Watermark Projects and Landia 

Watermark Projects (part of leading engineering services company, W.A Cooke & Sons) has introduced a Landia mixing system to help handle wastewater at an expanding organic poultry producer in South Wales.

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A strong partner with extensive experience in wastewater

Landia supplied the first mixers for sewage treatment plants in the 1980s and today you will find Landia products at sewage treatment plants worldwide. The wastewater industry is growing year by year and we are keeping pace. When you contact Landia, you will speak with staff who know the industry, and who knowsand understand the wastewater industry.

This is how we develop the best solution with you