Bone-, blood- and meat meal production (Fremstilling af ben-, blod- og kødmel)


Slaughterhouse waste is usually converted into bone- blood- and meat meal which can be used for animal feed.

Process description

The present data refer to bone, blood and meat meal production in daka. Different production methods are applied in the industry, but some of the main processes are following: 1) by-products from slaughterhouses (bones, heads, intestines, feathers, skins etc.) are transported to the factories in closed containers, 2) the products are minced, 3) the "mincemeat" is coagulated by heating (80-90oC) 4) liquid and solid material is separated by pressing, 5a) the solid fraction is dried (110oC), 6a) the dry product is screened, sterilised (133oC), packed and stored for distribution, 5b) the wet fraction is heated (105oC) and fat is separated, 6b) fat is sterilised (125oC), packed and stored for distribution. The wastewater generated during the process is either treated completely and emitted to recipient or treated to some extent and diverted to further treatment in municipal wastewater treatment plants. Ventilation air is treated in bio-filters. Bone, blood and meat meal from healthy animals has traditionally been used for animal feed. However, use of the products for feed has been banned in EU since 2000  due to fear of BSE and the products are currently incinerated.

Data collection and treatment

Average data for all products (bone, blood and meat meal) produced from all kinds of raw materials (bones, heads, intestines, feathers, skins etc.) have been extracted from daka's green account 1999/2000. Data on emissions to water are derived from daka Randers where wastewater is emitted to marine recipient after complete treatment.

Technical scope

All production processes as well as administration, product storage, waste water treatment and air treatment are included. Maintenance of equipment, use of cleaning agents and chemicals are not included. Packaging is not included.



daka has large share of the Danish market and the data are very representative to average production of bone-, blood- and meat meal produced from average raw materials in Denmark. However, the energy consumption for specific raw materials and specific products vary significantly (primarily due to different water contents of the raw materials) and the present data do not represent specific raw materials and specific products accurately.


Data from three different daka factories (Randers, Løsning and Lunderskov) vary but are in the same order of magnitude.

Inputs and outputs

Inputs and outputs associated with bone, blood and meat meal are shown in the table below. Data are provided per ton of raw material entering the factory.


    Unit Quantity
Inputs Slaughterhouse waste t 1.0
Electricity kWh 82
Heat MWh 0.53
Water litres 900
Outputs Products
Bone, blood, and meat meal t 0.39
District heat kWh 45
Emissions to aquatic recipients
COD g 44
Total N g 77
Total P g 0.10
Emissions to air
Amino compounds g 15
Hydrogen sulphides g 0.65

Location in database: Waste Treatment/Others/Bone, blood and meat meal production




daka (1999/2000): Green account (in Danish).


Administrative information

Data URL:
Version no.:
Authors: Per H. Nielsen
, 2.-0 LCA Consultants.
Data entry: Data have been entered in this format by Per H. Nielsen
Data completed: July 2003.