# Commission Implementing Decision (EU) 2017/302 of 15 February 2017 establishing best available techniques (BAT) conclusions, under Directive 2010/75/EU of the European Parliament and of the Council, for the intensive rearing of poultry or pigs (notified under document C(2017) 688) (Text with EEA relevance), Division BAT 16

Extent: E+W+S+N.I.

In order to reduce ammonia emissions to air from a slurry store, BAT is to use a combination of the techniques given below.
A description of the techniques is given in Sections 4.6.1 and 4.12.3.
Technique
Applicability
a
Appropriate design and management of the slurry store by using a combination of the following techniques:
1.
Reduce the ratio between the emitting surface area and the volume of the slurry store;
May not be generally applicable to existing stores.
Excessively high slurry stores may not be applicable due to increased costs and safety risks.
2.
Reduce wind velocity and air exchange on the slurry surface by operating the store at a lower level of fill;
May not be generally applicable to existing stores.
3.
Minimise stirring of slurry.
Generally applicable.
b
Cover the slurry store. For this purpose, one of the following techniques may be used:
1.
Rigid cover;
May not be applicable to existing plants due to economic considerations and structural limitations to withstand the extra load.
2.
Flexible covers;
Flexible covers are not applicable to areas where prevailing weather conditions can compromise their structure.
3.
Floating covers such as:
plastic pellets;
light bulk materials;
floating flexible covers;
geometrical plastic tiles;
air-inflated cover;
natural crust;
straw.
The use of plastic pellets, light bulk materials and geometrical plastic tiles is not applicable to naturally crusting slurries.
Agitation of the slurry during stirring, filling and emptying may preclude the use of some floating materials which may cause sedimentation or blockages in the pumps.
Natural crust formation may not be applicable to cold climates and/or to slurry with low dry matter content.
Natural crust is not applicable to stores where stirring, filling and/or discharging of slurry renders the natural crust unstable.
c
Slurry acidification.
Generally applicable.

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Source: https://www.legislation.gov.uk/eudn/2017/302/annex/division/3/division/1/division/1.11/division/BAT+16 (the official version)
Page: https://openlegislation.uk/eu-decision-2017-302/annex/division-3/division-1/division-1.11/division-BAT+16
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.