Landia developed their first chopper pumps in 1950. A chopper pump is a pump with rotating knives at the inlet of the pump, - a knife system which ensures that the pump does not stop due to impurities in the fluid being pumped.
Originally, Landia's chopper pump was designed to chop straw, which was always present in liquid manure and gave rise to breakdowns and problems.
Landia chopper pumps are still used extensively for pumping liquid manure but over the years have also won recognition for their excellence in other industries where there is a need for trouble-free pumping of e.g. untreated wastewater, sludge, liquid biomass, by-products from the food industry or highly abrasive fluids.
Most of Landia's chopper pumps can also be obtained in acid proof steel for pumping fluids with low or high pH.
A submersible mixer is submerged into the fluid which is to be mixed. This offers effective mixing as well as simple installation - it is even possible to mount a Landia mixer without emptying the tank.
Landia's mixers are designed to handle viscous and highly corrosive fluids and are used in e.g. wastewater treatment plants, biogas plants, the agricultural industry, the food industry and in various industrial processes.
Typical applications: waste water treatment plants, biogas plants, food industry, the chemical industry, etc.
The Landia POPTR-I is a flexible and efficient mixer, typically used for mixing fluids with a high solid content, such as sludge, digested biomass or fish silage. The relatively low revolutions per minute leads to the POPTR-I being ideal for mixing fluids of high viscosity.
A POPTR-I mixer is mounted through the side of the tank wall, which means that all service and maintenance can be performed from the outside - the tank does not need to be emptied or the mixer lifted out of the tank. Furthermore, the POPTR-I is able to mix very hot fluids, since the electric motor has optimal cooling conditions.
The Landia POPTR-I can be installed in most types of tanks - concrete as well as steel tanks.
Landia mixers are always adapted to the specific task and are supplied with installation equipment which ensure a long lifespan and safe operation.
The Landia BioMoverTM is specially developed for the gentle mixing of the plastic carrier elements (bio media) in MBBR and IFAS tanks.
The bio media which are used in MBBR and IFAS processes in modern wastewater treatment plants are usually manufactured by HDPE.
The bio media are designed in such a way that they have a very large internal surface area upon which bacteria can grow without being knocked off, or otherwise destroyed, when they rotate and collide.
1. MBBR = Moving Bed Biofilm Reactor
2. IFAS = Integrated Fixed-Film Activated Sludge
3. HDPE = High-Density Polyethylene
Advantages of the Landia BioMover™
Since the 1970s, Landia has been producing aerators. Today, the programme consists of two types:
Landia AirJet is a so-called air ejector where the air, and thus the oxygen, is automatically sucked into the ejector and then mixed with the wastewater from which it is pumped, under pressure, into the tank.
In its simplicity, the Landia AirJet consists of a chopper pump with equipped with an ejector system. Compared to many other aeration systems, AirJet is extremely easy to install and manage. There is no need for compressors, bottom-mounted diffusers and advanced controls.
Landia AirJet can be installed in existing tanks - it is not even necessary to empty the tank when mounting!
Landia AirJet is available in three different versions
PODB-I propeller aerators
Landia PODB-I propeller aerators are submerged into the liquid in a tank or an open lagoon, and operates by the rapidly-rotating propeller creating a vacuum behind the propeller, wherein atmospheric air (or pure oxygen) is sucked down through a tube.
Landia PODB-I is available in two different versions
An Air Jet consists of a Landia chopper pump and an ejector system. With its effective knife system, the chopper pump ensures that the aerator does not get clogged due to contaminants in the waste water.
Application areas for Landia AirJet are typically
Benefits include the following
Self-priming propeller aerators where the air, and therefore the oxygen, is automatically sucked down through a tube and dissolved in the wastewater by means of a rapidly rotating propeller.
Application areas for Landia's PODBI are typically
Benefits include the following
The Landia GasMix is a unique mixing system for
Anaerobic Digesters in municipal sewage treatment
plants and in agricultural or industrial biogas facilities.
One of the major advantages of the Landia GasMix
system is that all mechanical components are externallymounted, allowing all maintenance and inspection to
be completed without entering or opening the digester.
In addition to the major Health & Safety advantages
of never having to open the digester, there are also
economical advantages in that servicing of the Landia
We can supply several different control systems for our pumps, mixers and processing plants.
The range spans from the very simple, manual start/stop switches to advanced, programmable PLC control systems, with temperature sensors, pressure sensors, frequency converters, remote monitoring and electronic logbooks.
The choice of control system is based on a thorough clarification of the customer's current needs and long-term ambition.
Automatic control system via accurate measurement of the fluid pressure in the tank. Landia offers automation, where precise measurement of the liquid level in the slurry tank can control the pumps and mixers.
The so-called "pressure transmitter" sits at the end of a long rod that is mounted on the side of the tank and, via a line, is connected to a control cabinet.
The connected control cabinet monitors and controls the liquid level in the tank, based on the signal from the pressure transmitter.
Buried pit with dry-installed pump
The precast pump pit in PE (Polyethylene) is a good, easy, odourless and reliable alternative to traditional reception tanks and manually built concrete pits.
The PE-pump pit is completely sealed and is fitted with a base plate so that it will stay in the ground in the event of the ground water rising.
The PE-pump pit fits all Landia's dry-installed MPTK pumps, which are available in several different sizes.
The PE-pump pit is made of dimensionally stable moulded Polyethylene (PE) and is supplied complete at the desired height with the required pump and appropriate vent valves, sluice valves and hinged lids.
We offer a range of manual valves (knife gate valves) for piped slurry systems, which fit standard PVC pipe diameters of 110, 160 and 200 mm.
All valves are in acid-proof stainless steel.
The valves are glued to the pipes and are easy to operate with their removable levers.
See the brochure below for further information.
Cleaning barn floors has been made quick, easy and efficient with Landia's FloorFlushTM.
The solution consists of one or more flush valves, which has been flush-mounted into the barn floor, and is connected to a submersible pump in a tank via buried pipes.
As the washwater, groundwater collected from the yard or roof may be used - or, as shown in the following video clip: recycled collected washwater from the previous cleaning of the dairy system.
In hibernation mode, the valve is flush-mounted into the floor.
When the submersible pump is powered up, the water pressure will automatically lift the valve a few centimetres up off the floor so that water can be sprayed out over the floor in a predetermined direction, thereby flushing the floor clean of slurry and other solid material.
When the water pressure ceases, the valve falls back down to its recessed space in the floor.
To ensure problem-free pumping of the piped slurry to the storage tank, we recommend a special discharge pipe in hot-dipped galvanized steel.
The pipe hangs vertically down from the edge of the tank's inside, where it extends almost to the bottom of the tank to prevent splashing over the edge.
On the external side, a solid pipe is placed vertically along the tank wall. This piping can be insulated up to full height and if required be fitted with an electric heating cable to allow discharge in winter during hard frost.
To make it easy to hoist the pump or mixer out of the tank for inspection or service, we recommend an original Landia crane, which is easy to install and simple to use.
The crane can be mounted in several different ways depending on the design of the tank and any covering.
In the example to the right, the crane is mounted down on top of the square pipe, which controls the mixer inside the tank. The bracket is produced upon request in various sizes and shapes.
All parts are made as requested, EITHER in stainless steel OR in hot-dip galvanised steel to ensure durability.
Safety comes first
In order to prevent accidents during inspection and servicing of pumps and mixers in open tanks, we recommend installation of a working platform in a fixed position at the tank’s edge to ensure easy and stable access.
The platform is available in several sizes and shapes and are supplied with brackets that fit exactly the equipment that is to be inspected and serviced.
All parts are made out of hot-dip galvanised steel to ensure durability.
We offer several different manual sluice gates and stop taps for mounting on slurry tanks, slurry pipes and slurry channels.
All products are made of durable materials; either galvanised steel or stainless steel.
Our products are often used in aggressive environments under demanding operating conditions and with long operating times.
Therefore, all Landia products are constructed based on the following principles: All components are sized so that they are not overloaded; wearing parts (bearings and sealing systems) can easily be replaced directly on site
The need for service and maintenance is minimal and can be done on site, without the unit needing to be transported to a service centre - and it can often be done by the operating staff themselves. Naturally, you can also book one of Landia's own service technicians to come and help you with servicing, preventive maintenance, or any repairs.
In connection with a service call and upon prior arrangement, we can set aside extra time to train one or more of the customer's own staff to do preventive maintenance.
To ensure prompt and correct delivery and to minimise your expenses, please state the device's serial number and product number, which you will find on the metal identification plate on the motor.
Delivery time: Spare parts are usually sent daily from Landia own departments as well as from several of our distributors.