Pumping & Mixing Solutions for Wastewater Municipal & Industrial
Customised Pumping & Mixing Solutions
At Landia, we understand that no two plants are alike. That is why we don’t deliver offthe-shelf products, but pumping and mixing solutions tailored to the specific needs of your wastewater treatment plant.
We work closely with you to design the optimal solution – ensuring reliable operation, high efficiency, and long service life.
As a Danish manufacturer, we maintain full control of quality across every component.
This also means fast service and guaranteed access to original spare parts – even years after installation.
When you choose Landia, you get more than robust equipment. You gain a partner who listens, advises, and delivers solutions built for long-term performance.
The Digester Mixing System.
Mixing Nozzle UpperCrust Breaker
In the second stage, sludge is injected into the upper part of the digester, where biogas is entrained and mixed into the flow, supporting gas release and process stability.
Depending on digester type and size, a third stage can be included, where sludge is injected into the top zone to prevent surface crust formation.
Nozzle
The mixing process is carried out in stages:
In the first stage, sludge is injected into the lower part of the tank, creating powerful bulk mixing and preventing sedimentation.
Landia GasMix Nozzle
Recirculation through the upper and lower nozzles creates rotational flow throughout the digester, ensuring complete mixing.
A key component of the GasMix system is the chopper pump. It delivers the required flow and pressure to the nozzles while reducing solids to smaller particles, supporting a stable and efficient biogas process.
Why Choose Landia GasMix?
• 100% gas-tight system
No loss of methane or CO2
• Easy service and routine maintenance
Fewer man-hours required
• Improved health & safety
No personnel working in the gas zone
• No gas leaks or temperature drop
During maintenance
• Landia chopper pump technology
Effective solids reduction - prevents clogging
• Lower lifecycle assessment
Reduced demands on tank construction
• Minimal space required for service
Compared to other digester mixers
External Mixing. Simple. Safe. Reliable.
A complete external mixing system consisting of a Landia chopper pump, JetMix nozzles, pipework, and valves.
Nozzles are positioned at multiple levels to ensure full mixing and prevent surface crust formation.
Installed through the tank wall, the system eliminates the need for internal equipment.
• Lower service costs –all maintenance from ground level
• Safer working conditions – no confined space or height work
• No downtime – no need to empty the tank
Built to mix. Designed to last.
Mixing without limits.
Landia offers one of the industry’s most comprehensive ranges of mixers and flowmakers – designed for a wide variety of applications and operating conditions.
Each solution is precisely matched to the task.
With motor sizes from 1.1 to 30 kW and propeller diameters from 300 to 2500 mm, we cover everything from gentle circulation to heavy-duty mixing.
• Wide product range
• 1.1 - 30 kW motors
• 300 - 2500 mm propellers
• For mixing, agitation, and circulation
• Submersible or dry installation
Designed for demanding mixing in wastewater treatment applications.
Available for submersible or dry installation.
Submersible
MODEL: POP-I 300
Motor sizes: 1.1 - 30.0 kW
Propeller rpm: 300 rpm
Propeller diameter: 365 - 880 mm
Option: Explosion-proof motor
Compact
MODEL: POD-I
Motor sizes: 1.1 - 18.5 kW
Propeller rpm: 1000 & 1500 rpm
Propeller diameter: 620 - 1080 mm
Option: Explosion-proof motor
Low Speed. High Efficiency.
Flowmaker
MODEL: POPL-I
Motor sizes: 1.1 - 7.5 kW
Propeller diameter: 1700 - 2500 mm
Propeller rpm: 19 - 47 rpm
Material: AISI 316
The POPL-I is a low-speed flowmaker designed for efficient mixing and flow generation in large volumes, with minimal power consumption.
A key feature of the POPL-I is the adjustable propeller blades, allowing the pitch to be adapted to the specific application. This ensures optimised performance and energy efficiency.
The stainless steel propeller is designed for long service life under demanding conditions. For added reliability, Landia offers a lifetime warranty on the propeller blades.
• Energy-efficient largevolume mixing
• Adjustable blades for optimal performance
• Stainless steel construction with lifetime warranty
• Reliable operation with minimal maintenance
Side-entry Mixer
Landia’s POPTR-I is a versatile and efficient side-entry mixer, designed for demanding mixing applications.
The three-blade propeller and low rotational speed ensure effective mixing of highviscosity liquids such as dewatered and digested sludge.
With the motor mounted outside the tank, service and maintenance are simplified. The external motor position also provides
optimal cooling, making the POPTR-I suitable for high-temperature applications.
The POPTR-I is suitable for most tank types, including concrete and steel.
Motor sizes: 3.0 - 22.0 kW
Propeller rpm: 300 rpm
Material: AISI 316
Option: Explosion-proof motor
Landia
Recirculation
Pumps:
Efficient Recirculation. Stable Operation.
Axial flow pumps designed for moving large volumes at low head.
Primarily used in wastewater treatment for sludge recirculation, but also suitable for drainage and aquaculture applications.
Available in three sizes – 300, 500 and 800 mm – with capacities up to 5,000 m3/h. Stainless steel (AISI 316) version available on request.
The AXP-I / AXD-I is typically mounted externally on the tank wall but can also be installed in-line in pipe systems.
Axial Flow Pumps
MODEL: AXP-I
Motor sizes: 1.1 - 18.5 kW
Propeller rpm: 300, 500 & 800 rpm
Capacity: up to 5,000 m3/h
Pump Head: up to 1.5 m
Landia AirJet Aeration for Oxidation Tanks
Smart Aeration in One System.
Landia AirJet is a compact ejector-based aeration system powered by a chopper pump.
It combines mixing and aeration in one simple solution and can often be installed without emptying the tank.
AirJet is ideal for wastewater and sludge treatment, helping reduce odours while improving process performance.
• Easy installation – often without tank emptying
• No maintenance on the aerator
• Reliable operation at depths down to 7–8 m
• Available in acidresistant stainless steel
Unique Knife System. No Clogging.
Pumps that last.
Our chopper pump is engineered for demanding applications with high solids content.
The key feature is the knife system, positioned ahead of the impeller and separated from the pump housing.
It cuts rags, wipes, and fibres before they enter the pump – preventing clogging and reducing wear.
• No clogging – even with fibrous materials
• Longer uptime, less maintenance
• Lower operating costs
• Designed for harsh and aggressive media
Chopper Pumps for dry or submersible installation.
Two types of pumps are available:
Close-coupled
MODEL: MPTKR-I
Motor sizes: 1.1 - 22.0 kW
Pump sizes: 65, 80 & 105 mm
Capacity: up to 300 m³/h
Head: up to 22 m
Material: AISI 316
Seals: Double mechanical seals
Submersible
MODEL: DG-I
Motor sizes: 5.5 - 22.0 kW
Pump sizes: 80 & 105 mm
Capacity: up to 300 m³/h
Head: up to 22 m
Material: AISI 316
Seals: Double mechanical seals
Hygienisation – Efficient Treatment of By-products
• Stainless steel components for long service life
• Resistant to low-pH liquids (e.g. fish silage)
• Integrated knife system
• No clogging
• Reduced maintenance and downtime
Landia BioChop is a complete, reliable solution for hygienisation at wastewater treatment plants.
The system is compact, user-friendly, and built entirely in stainless steel. A double-walled tank with integrated heating eliminates the need for external heat exchangers.
The Landia chopper pump ensures efficient maceration, mixing, and emptying.
An integrated control system with touchscreen and data logging provides full process control and documentation.
