# 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 45:: In order to reduce emissions of organic compounds to air from formaldehyde production and to use energy efficiently, BAT is to use one of the techniques given below.

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

Technique
Description
Applicability
a.
Send the waste gas stream to a combustion unit
See BAT 9
Only applicable to the silver process
b.
Catalytic oxidiser with energy recovery
See Section 12.1. Energy is recovered as steam
Only applicable to the metal oxide process. The ability to recover energy may be restricted in small stand-alone plants
c.
Thermal oxidiser with energy recovery
See Section 12.1. Energy is recovered as steam
Only applicable to the silver process
Table 5.1
BAT-AELs for emissions of TVOC and formaldehyde to air from formaldehyde production
The lower end of the range is achieved when using a thermal oxidiser in the silver process.
Parameter
BAT-AEL(daily average or average over the sampling period)(mg/Nm3, no correction for oxygen content)
TVOC
< 5–30
Formaldehyde
2–5
The associated monitoring is in BAT 2.

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Source: https://www.legislation.gov.uk/eudn/2017/2117/annex/division/5/division/5.1/division/BAT+45 (the official version)
Page: https://openlegislation.uk/eu-decision-2017-2117/annex/division-5/division-5.1/division-BAT+45
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.