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– utilised in a biogas processing plant,
– utilised in a composting prism,
– burned in an incineration plant,
Category 3:
– utilised in the animal feed industry,
– utilised in biogas processing plants,
– utilised in a composting prism,
– burned in an incineration plants,
In Hungary there are six agro-processing plants which produce bone and meat meal
from different types of carcass (e.g. cat, dog, cow, pig, chicken), and there are a further
six plants which produce meat meal from the wastes of nearby slaughter-house. The
first group of plants incinerates the carcasses of cows infected by BSE. The pathogenic
prion is harmful in the meat meal, so must be burned. EU regulations don’t allow the
use of meat meal from cattle. (Connett 2005.)
The twelve plants manufacture 300.000 tons of products and burn about 60.000 tons
meat meal and fat. The European Waste Catalogue numbers are (EWC) 020102 or
020202 or 020203.
MATERIAL AND METHODS
Samples were taken form the meat meal and the components important from point of
view of burning were analyzed. The chemical composition of flue gas produced in the
course of burning was calculated by computer modelling and using the method of
approximation. Any parameter of the flue gas has to be lower than the legally approved
values. Based on the identified composition of the flue gas the optimum technology of
burning as well as the optimum technical parameters could be determined.
Measurements
Samples weighing a total of four thousand grams were collected from industrial fat and
meat meal. The chemical composition of the samples was analysed in two independent
laboratories (a/1-a/3, b/1-b/3) and the parameters are presented in the tables below.
Table1: Analyses of a wet meat meal sample
Samples Carbon (%) Hydrogen (%)
a/1 42,0 4,5
a/2 41,8 2,7
a/3 40,6 2,3
Table 2: Analyses of a dry meat meal sample
Samples Carbon (%) Hydrogen (%)
b/1 42,2 1,6
b/2 38,8 1,9
b/3 41,3 3,3
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