# Commission Implementing Decision (EU) 2020/2009 of 22 June 2020 establishing the best available techniques (BAT) conclusions, under Directive 2010/75/EU of the European Parliament and of the Council on industrial emissions, for surface treatment using organic solvents including preservation of wood and wood products with chemicals (notified under document C(2020) 4050) (Text with EEA relevance), Division BAT 35: In order to reduce the consumption of treatment chemicals and the consumption of energy and to reduce emissions of treatment chemicals, BAT is to optimise the wood charge of the vessel and to avoid trapping of treatment chemicals by using a combination of the techniques given below.

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

Technique
Description
Applicability
(a)
Separation of wood in packs by spacers
Spacers are placed at regular intervals in the packs to facilitate the flow of treatment chemicals through the pack and the draining after treatment.
Generally applicable.
(b)
Sloping of wood packs in traditional horizontal treatment vessels
Wood packs are inclined in the treatment vessel to facilitate the flow of treatment chemicals and the draining after treatment.
Generally applicable.
(c)
Use of tilting pressure treatment vessels
The whole treatment vessel is inclined after treatment so that excess treatment chemicals drain easily and can be recovered from the bottom of the vessel.
Only applicable to new plants or major plant upgrades.
(d)
Optimised positioning of shaped wood pieces
Shaped wood pieces are positioned so as to prevent trapping of treatment chemicals.
Generally applicable.
(e)
Securing wood packs
The wood packs are secured inside the treatment vessel in order to limit the movement of wood pieces which could change the structure of the pack and reduce the impregnation efficiency.
Generally applicable.
(f)
Maximisation of the wood load
The wood load in the treatment vessel is maximised to ensure the best ratio between the wood to be treated and the treatment chemicals.
Generally applicable.

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Source: https://www.legislation.gov.uk/eudn/2020/2009/annex/division/2/division/2.5/division/BAT (the official version)
Page: https://openlegislation.uk/eu-decision-2020-2009/annex/division-2/division-2.5/division-BAT
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.