best available technologies for manure treatment - Baltic Green Belt

Best Available Technologies for manure treatment baltic sea 2020
Best Available Technologies for manure treatment baltic sea 2020
ANNEX E: TABLES WITH SHORT DESPRIPTION OF LIVESTOCK MANURE TREATMENT TECHNOLOGIES
Best Available Techniques for manure treatment - for intensive rearing of pigs in Baltic Sea Region EU Member States Technical Report "Best Practice Manure Handling, Phase 2"
Ref No. 44 Pyrolysis / Thermal gasification
Brief description Description of the effect on leaching (positive or negative) of N and P
Thermal gasification can give higher efficiency as compared to combustion and fewer problems
with corrosion.
Thermal gasification adds heat (with or without oxygen, depending on the technology) to the
incoming biomass and consists of two processes: Pyrolysis converting most organic substances
into gasses at some 400-700 o Celsius in a Circulating Fluid Bed reactor giving rise to a charcoal,
which in the following gasification in a second reactor also will be turned into gas.
The resulting gas is not at present useful for all engine types.
Thermal gasification of the solid separation fraction has been implemented on pilot basis in
combination with other technologies.
At present the process has faced the same challenges as the combustion technology by the EU
Waste Incineration Directive (2000/76/EEC) and therefore it is not available on the market.
Thermal gasification has some advantages as compared to
combustion due to lower temperatures in the process:
Less NOx emission
Less dioxin emission
More readily reuse of ash-P
Generally, the P is not lost in this technology and can apparently be
used directly into fertiliser production.
Most of the N will be converted to N
2
, and therefore not leach.
Innovation stage
Investment price,
Basic Variable
Operational
costs,
per tonnes
per kg saved N or P leaching Complexity of implementation
Research
Pilot
Practice
Major references
Not presently available
as standalone
technology at farm
scale
Condition for leaching
reduction effect
Jørgensen et al.,
2008 Scenarios II to V.
-
Cannot be
calculated at
present
Certainty of information
Prices ?
Effect on
leaching
High
Cannot be calculated at present. Economic
feasibility studies should be made in all
target countries. Potentially a rather
expensive technology.
Difficult to implement technically, with
legislative challenges in relation to the
interpretation of the EU Waste Incineration
Directive
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