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 treatmentAverage 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.
|
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 |
References
daka (1999/2000): Green account (in Danish).
Data URL:
http://www.lcafood.dk/processes/industry/bonemeal.html
Version no.: 1.00
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.