Green recycling · A concept for the horse farm
Manure into pellets
The horse manure is dried, pressed into pellets and turned into heat – in a self-contained cycle on the farm.
- Horse manure
Pellets approx. 5–7 % moistureView product
The Biotherm burner for horse manure, 250–1,000 kW
From manureto heat.
Biotherm's unique burner burns the manure and bedding from the stalls on the farm. The heat goes to stables, riding arenas and homes – instead of the manure being stored, hauled away and landfilled.
- Output
- 250–1,000 kW
- Moisture content of the manure
- Up to 60 %
- Landfill
- Not needed
- Developed with
- Luleå University of Technology
01The heat source
Every horse isa heat source.
The manure from an average-sized horse provides fuel for roughly 4 kW, around the clock.
- 40 horses
- approx.160kW
- An average-sized riding school or trotting yard.
- Heated area
- approx.2,500m²
- Stables, premises and homes.
The waste becomes heat on site – with no landfill and no transport.
Approximate values according to Biotherm, for an average-sized horse and a facility with 40 horses.
02Moisture content
The manurecan be wet.
Horse manure holds 30–75 % moisture. The burner burns it at up to 60 % – and mixing in wood chips controls the moisture content.
Manure from the stalls
30–75 % Add wood chipsThe mixer
The fuel is blended in the mixer – wood chips and horse manure in the right proportions – before it reaches the burners.
Drying and pelleting
The manure can also become pellets. It is dried in our own dryer and pressed into pellets, which can be stored from summer to winter. Example: from a 500 kW burner, around 130 kW goes to the dryer – the surplus heats the buildings.
Manure into pellets
03The burner
Built for thewet fuel.
Biotherm's unique burner for horse manure, extremely wet wood chips and slaughterhouse waste – and it can be adapted for more fuels. The image shows two burners in stainless steel, with cover plates.
250–1,000kWOutput range
Developed by Biotherm Heat AB together with Luleå University of Technology.
Burns
- Horse manure
- Wet wood chips
- Slaughterhouse waste
Can be adapted for
- Wood chips
- Pellets
- Briquettes
- Sod peat
- Grain
Can be fitted with
- Hot-water boilermax 110 °C
- High-temperature boilermax 160 °C, and steam generator
- Steam boiler
04The plant
From the storeto the ash.
Two burners side by side, with a shared secondary channel in front of the boiler – here in three steps. Biotherm designs and engineers the plant in 3D.
From the fuel store to combustion.
The fuel is loaded into the stores outdoors. Conveyor screws carry the material to the mixer pockets and then on into the burners.
- 1The drop chute
From the store.
- 2Conveyor screws
Carry the fuel from the stores to the mixing stations.
- 3The mixer
Blends the wood chips and horse manure in the right proportions before the material reaches the burners.
- 4Screw motors
Finally feed the fuel into each burner.
How the manure becomes heat.
The fuel is fed in from the rear and burns on the grate. The flue gases rise into the horizontal secondary combustion chamber, which carries the energy on into the boiler and its heat exchanger.
- 1The burner body
Where the fuel burns on the grate.
- 2The inlet
Where the flue gases rise into the secondary channel.
- 3The secondary channel
Secondary combustion, shared by both burners.
- 4The boiler
Its heat exchanger recovers the heat.
Screws carry the ash out.
Ash screws run across the lower part of the burners and collect the ash from both burners. An inclined screw then carries it out through the wall.
- 1The secondary channel
Shared by both burners. Passes the heat on to the boiler.
- 2The burner bodies
Shown transparent here, so that the ash screws are visible.
- 3The ash screws
Run across the lower part of the burners and collect the ash.
- 4The gear motors
Drive the screws, one motor per screw.
- 5The inclined screw
Lifts the ash out through the wall.
- 6The ash chute
Where the ash drops out, outside the boiler room.
After the boiler, the flue gases pass through a cyclone and a bag filter. The whole chain is shown on the page about the burner for slaughterhouse waste – it is the same burner.
See the complete plant
05Experience
Over 20 yearswith horse manure.
The burner was developed together with Luleå University of Technology for combustion as close to 100 % as possible – whatever the fuel.
We are a family business in its fourth generation, with offices in Västerås and Luleå. We developed the burner ourselves – and we are still there once the heat is on.
- Since 1976Sustainable heating from the family business
- 1996A 15-year collaboration with Luleå University of Technology begins
- Over 20 yearsExperience with horse manure as a fuel
- Reference
- Ickholmen
- Output
- 1,000 kW (2 × 500 kW)
The whole chain
What goes with it.
Fuel stores, the dryer and tanks also come from us – and are matched to the burner from the start.
Biotherm Heat · In-house manufacturing
Fuel stores
Spring agitators, scraper-floor stores, carports and silos – built to suit your conditions and wishes.
- Wood chips
- Pellets
11–500 m³View product
Biotherm Heat · Tanks
Accumulator tanks
The tank stores the heat from the boiler and smooths out the peaks.
- Wood chips
- Pellets
- Firewood
- Horse manure
300–20,000 lView product
Free heat-load calculation
Let's calculate your heating.
Tell us how many horses you have and what needs heating, and we will calculate the plant – the heat-load calculation is free.
info@biothermheat.comVästerås · Luleå