# Commission Implementing Decision (EU) 2017/2117 of 21 November 2017 establishing best available techniques (BAT) conclusions, under Directive 2010/75/EU of the European Parliament and of the Council, for the production of large volume organic chemicals (notified under document C(2017) 7469) (Text with EEA relevance), Division BAT 86:: In order to recover solvents and to reduce emissions of organic compounds to air from all units other than the hydrogenation unit, BAT is to use an appropriate combination of the techniques given below. In the case of using air in the oxidation unit, this includes at least technique d. In the case of using pure oxygen in the oxidation unit, this includes at least technique b. using chilled water.

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

Technique
Description
Applicability
Process-integrated techniques
a.
Optimisation of the oxidation process
Process optimisation includes elevated oxidation pressure and reduced oxidation temperature in order to reduce the solvent vapour concentration in the process off-gas
Only applicable to new oxidation units or major plant upgrades
b.
Techniques to reduce solids and/or liquids entrainment
See Section 12.1
Generally applicable
Techniques to recover solvent for reuse
c.
Condensation
See Section 12.1
Generally applicable
d.
Adsorption (regenerative)
See Section 12.1
Not applicable to process off-gas from oxidation with pure oxygen
Table 11.1
BAT-AELs for emissions of TVOC to air from the oxidation unit
The BAT-AEL does not apply when the emission is below 150 g/h.
When adsorption is used, the sampling period is representative of a complete adsorption cycle.
In the case of significant methane content in the emission, methane monitored according to EN ISO 25140 or EN ISO 25139 is subtracted from the result.
Parameter
BAT-AEL(daily average or average over the sampling period)(no correction for oxygen content)
TVOC
5–25 mg/Nm3
The associated monitoring is in BAT 2.

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Source: https://www.legislation.gov.uk/eudn/2017/2117/annex/division/11/division/11.1/division/BAT+86 (the official version)
Page: https://openlegislation.uk/eu-decision-2017-2117/annex/division-11/division-11.1/division-BAT+86
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.