The Biotherm burner for slaughterhouse waste

Turn slaughterhouse waste into heat.

Two Biotherm units side by side in silver and blue, with Biotherm Heat AB signs, on a glossy floor that reflects them

250–1,000kWOutput range

01The Biotherm burner

Your own waste.Your own heat.

Biotherm’s own burner for slaughterhouse waste and other residues. The waste is shredded, blended with wood chips and burned – and the boiler turns it into heat, where it is produced.

The burner can be fitted with

Hot-water boiler: max 110 °C
High-temperature boiler: max 160 °C, and steam generator
Steam boiler

Two stainless-steel Biotherm burners with a secondary channel in a boiler room

02The cycle

The circle closeson site.

The waste does not need to be taken away. It passes through the shredder and the burner – and comes back as heat, where it was produced.

Landfill: Not needed
Transport: No transport of the waste off site
Storage: The waste does not need to be stored
The heat: Used on site

Back againThe heat is used where the waste is produced.

The residues
Slaughterhouse waste and other residues.
The shredder
Shreds the waste for further handling.
The mixer
Blends slaughterhouse waste and wood chips in the right proportions.
The burner
The fuel burns on the grate.
The boiler
Recovers the heat.

03How the burner works

How the wastebecomes 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 in turn carries the energy into the boiler and its heat exchanger, where the heat is recovered.

1
The burner body
Where the fuel burns on the grate.
2
The inlet
Where the flue gases rise into the secondary channel.
3
The secondary channel
Secondary combustion, shared by both burners.
4
The boiler
Its heat exchanger recovers the heat.

Two burners with a shared horizontal secondary channel leading into the boiler, from the plant’s CAD model

The shredder: hopper, shredder shafts with a blue gear motor and a black 3 m³ bin underneath

04The shredder · in-house manufacturing

First the shredder.Then the burner.

The shredder breaks up slaughterhouse waste – bone remnants, skulls and the like – for further handling. It runs for a set time and only with the lid closed.

Fill.Open the lid and fill the hopper.
Close.The safety switch confirms that the lid is closed.
Start.Enter the start code. The shredder stops after the set time.

Motor power: 2 × 7.5 kW; Two shredder shafts.
Inlet: 1,200 × 800 mm
Shredding time: 0–20 min; Factory-set to 5 minutes.
Bin: 3 m³; Or a conveyor belt.

More about the Shredder, standard and wide

05The plant

The completeplant.

A 1,000 kW Biotherm burner (2 × 500 kW) with a shared secondary channel in front of the boiler. The flue gases then pass through a cyclone and a bag filter. Biotherm designs and engineers the plant in 3D.

The flue gas path

1The burners
2The secondary channel
3The boiler
4The flue duct
5The cyclone
6The bag filter

The fuel feed

The fuel is loaded into the stores outdoors. Conveyor screws carry the material to the mixer pockets and then on into the burner or burners.

The ash

Ash screws run across the lower part of the burners and collect the ash from both burners. An inclined screw carries it out through the wall, to an ash chute outside the boiler room.

06Experience

Developed fordifficult fuels.

The burner was developed together with Luleå University of Technology for combustion as close to 100 % as possible – whatever the fuel. It can be adapted for biological residues, which makes it well suited to slaughterhouses and livestock farmers.

Built for slaughterhouse waste, horse manure and extremely wet wood chips – and it can be adapted for wood chips, pellets, briquettes, sod peat and grain.

A delivered Biotherm plant: the burner with secondary channel, conveyor screws and blue gear motors — Delivered Biotherm plant

07Sustainable heating since 1976

One contact. All the way.

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.