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. 52 N-stripping
Brief description
Description of the effect on leaching (positive or negative) of N
and P
By stripping a part of the dissolved ammonia in a liquid can be removed by evaporated to the air.
Subsequently, the evaporated ammonia is collected in concentrated form in a second liquid. It is thus
possible to move ammonia from the manure slurry to a second liquid and use this as a concentrated
fertiliser. N-stripping is a two stage process: The first part happens in a stripping column, where air is
added to release the ammonia. The released ammonia is transferred to an absorption column, where the
ammonia is captured with acidified water.
Ammonia in aqueous solution is volatile and requires special equipment if it should be used as fertiliser.
By acidifying the liquid with sulphuric acid you can form an ammonium fertiliser which is stable in
storage.
Ammonia stripping can be conducted at manure or degassed manure. Work is underway to develop a
stripper permanently transforming the ammonia formed in the biogas process. Stripping of ammonia
can improve the biological turnover of biogas plants as ammonia in high concentrations is deleterious to
the turnover. Stripping processes are well known from many industrial applications.
By stripping ammonia from manure you can produce a fertiliser,
either in the form of an aqueous solution of ammonia or an
ammonium sulphate solution. The fertiliser can be transported
and used as a direct substitute for commercial fertiliser. There
are made several demo scale trials with production of both
aqueous ammonia solutions as ammonium sulphate solutions.
The process can for instance be used in order to prevent the inhibition effect on the anaerobic digestion
of high N concentrations in the substrate as for instance chicken manure.
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
No data No data
Condition for leaching
reduction effect
3 to 10 per kg N
removed
Certainty of information
Depends on
the situation
of the
individual
farm.
High – this is not a stand-alone technology, but rather a
component of a high-tech livestock manure treatment
facility.
CBMI Scenarios II - V
Prices -
Effect on leaching High
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