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8.2.1.6 Hydrolisation
8.2.1.6.1
Description
8.2.1.6.2
Hydrolysation under pressure (AT3535005)
Achieved environmental benefits
Cross media effects
Operational data Applicability
Economics
Driving force for implementation
Example plants
Teil 3 Seite 8-24
Corporate clarification plant of the Kraftisried animal carcass disposal plant, 87647
Unterthingau
Corporate clarification plant of the East Bavarian Meat Flour Association,94447 Plattling
Corporate clarification plant of the Eiweiß- und Fettverwertung GmbH & Co, 49191
Belm-Icker, Germany
Clarification plant of the Union for Animal Carcass Disposal (Zweckverband für Tierkör-
perbeseitigung) Lenz, 01561 Lenz, Germany
Rethmann TBA Genthin GmbH, 39307 Mützel, Germany
Oberding animal carcass disposal plant, Germany
Reference literature
Description
High pressure thermohydrolysis (AT3535005)
The delivered animal by-products are mechanically crushed. In the thermal high pres-
sure hydrolysis stage, sterilisation and hydrolysis of the meat slurry is carried out at
approx. 200 C and 20 to 30 bar. After slurrying with process water, the hydrolysate is
largely converted into the energy carrier biogas in a subsequent biogas reactor This is
converted into electricity, and the fermentation remnant is dried after mechanical dehydra-
tion. The resultant process water is re-used for slurrying.
Achieved environmental benefits
Through lower consumption, re-use for slurrying and the discharge from the ammonia
stripper, the volume of water to be transported outside is significantly lower in comparison
to animal flour production. Combined, the effluent is analogous to that of conventional
waste fermentation plants. As a result of the conditioning required for the operation of the
dehydration device and ammonia stripper, COD concentrations reach 5 to 7 kg/m³ during
outflow.