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. 54 Reverse osmosis
Brief description
Description of the effect on leaching (positive or negative) of
N and P
Inverse membrane osmosis is used in a variety of industrial applications. Reverse osmosis is a membrane
filtrating technology by use of a semi-permeable membrane, and the technology can achieve a very good
quality of treated water. Reverse osmosis of slurry requires a pre treatment of the slurry to remove the
coarsest particles, thereby extending the operating time of filtration. Typically, a pre-treatment consist of a
simple mechanical separation followed by ultra filtration. Several Danish companies have been working for
years with membrane filtration technologies for treating manure and built a couple of full-scale plants,
although not currently in operation. The technology requires conducting regular rinses and regeneration
of membranes.
As for the other separation technologies.
With reverse osmosis, it is possible to obtain a water quality of
the treated slurry which makes it possible to discharge the
liquid fraction directly to the recipient. It is thus possible with
this technology to produce potable water. Operating costs for
the technology is so great that pt. there is no the basis for the
use of technology in the Baltic region.
The cost of operating a reverse osmosis plant can be quite significant and has been one of the barriers to
the use of the technology. The cost is partly due to the high energy consumption to create the high
operating pressures, cleaning and costs for replacement of membranes.
The process can remove 99% of the organic matter and up to 99.5% of the salts. For manure treatment the
K ion still remain in the water fraction and might set limits for the use of this as irrigation water.
The input in the process is a liquid fraction, for instance coming from ultra filtration. Acidification of the
feed fluid would typically be necessary to ensure a good nutrient removal.
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 No data
Condition for leaching
reduction effect
Massea et al., 2007 Scenarios II to V.
Certainty of information
Prices Low
Effect on leaching High
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.
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