Mixers for wastewater

Get the mixing that best suits your wastewater system with a mixer or current generator from Landia. We have solutions for large volumes of water, smaller tanks and for liquids with varying amounts of dry matter content.

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The benefits of a submersible mixer for wastewater (low speed)

Landia POPL-I is a low-speed mixer or current generator. Its primary use is for mixing and flow creation of large volumes of water at an exceptionally low energy consumption. 
With the adjustable propeller blades, the energy consumption can be adjusted by changing the angle of the propeller blades. You get the opportunity to achieve an energy consumption that is less than 1 W/m3.

The propeller blades on a POPL-I flow former are made of stainless steel. Experience shows that the propeller blades last forever, and you therefore get a lifetime warranty on propeller blades on your POPL-I mixer. If your wastewater is of an aggressive nature, POPL-I can even be supplied in acidproof stainless steel.

Flexible mixer for wastewater (medium speed)

Landia POP-I 150 is a flexible and efficient low speed mixer. It is used for mixing and flow creation with a low energy consumption. This can be, for example, in aeration tanks or anaerobic tank sections. Landia POP-I 300 is most often used for mixing liquids with a high dry matter content such as dewatered sludge. The relatively low speed and strong propeller design make the POP-I 300 the ideal mixer for all types of highly viscous liquids.

We offer to make Landia POP-I in acidproof steel if needed.

The benefits of a submersible mixer for wastewater (compact)

Landia POD-I is a compact mixer that is typically used for mixing liquids with a relatively low dry matter content and in smaller tanks. POD-I can be used at liquid levels below 1 m. The propeller speed is 1000 or 1500 rpm. If Landia POD-I is to be used for aggressive liquids, we offer to supply it made of acidproof steel.

Case study about submersible mixers

Our models

The sensible choice for your system

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Our solutions within wastewater

Case studies - wastewater


Huge savings made at leachate treatment plant

At a landfill’s leachate treatment centre, where floating biomass was reducing the plant’s throughput, the introduction by Viridian Systems of a new mixer has created annual savings on chemicals of around £85,000.

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Mix to the max at Yorkshire Water’s major new Energy & Recycling Facility

At Yorkshire Water’s new £50M Huddersfield Energy and Recycling Facility (E&RF), the digester mixing system from Whitchurch-based Landia is ensuring that total gas production can reach its anticipated 22,192Nm³/d (normal cubic meter/day).

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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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Try before you buy as dairy crest benefits from Landia’s wastewater aeration pump

Dairy Crest, makers of some of the UK’s best-loved food brands, has upgraded its wastewater treatment process by investing in a new mixing system from Landia.

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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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A strong partner with extensive experience in wastewater

In all honesty, you will not find anyone who has more experience with wastewater mixers than Landia.
Landia supplied the first mixers for sewage treatment plants in the late 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 like the wastewater industry.

This is how we develop the best solution with you