# 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 81:: In order to reduce emissions to water of PCDD/F and copper from the oxychlorination process, BAT is to use technique a. or, alternatively, technique b together with an appropriate combination of techniques c., d. and e. given below.

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

Technique
Description
Applicability
Process-integrated techniques
a.
Fixed-bed design for oxychlorination
Oxychlorination reaction design: in the fixed-bed reactor, catalyst particulates entrained in the overhead gaseous stream are reduced
Not applicable to existing plants using the fluidised-bed design
b.
Cyclone or dry catalyst filtration system
A cyclone or a dry catalyst filtration system reduces catalyst losses from the reactor and therefore also their transfer to waste water
Only applicable to plants using the fluidised-bed design
Waste water pretreatment
c.
Chemical precipitation
See Section 12.2. Chemical precipitation is used to remove dissolved copper
Only applicable to plants using the fluidised-bed design
d.
Coagulation and flocculation
See Section 12.2
Only applicable to plants using the fluidised-bed design
e.
Membrane filtration (micro- or ultrafiltration)
See Section 12.2
Only applicable to plants using the fluidised-bed design
Table 10.4
BAT-AEPLs for emissions to water from EDC production via oxychlorination at the outlet of the pretreatment for solids removal at plants using the fluidised-bed design
Parameter
BAT-AEPL(average of values obtained during 1 year)
Copper
0,4–0,6 mg/l
PCDD/F
< 0,8 ng I-TEQ/l
Total suspended solids (TSS)
10–30 mg/l
The associated monitoring is in BAT 79.
Table 10.5
BAT-AELs for direct emissions of copper, EDC and PCDD/F to a receiving water body from EDC production
The lower end of the range is typically achieved when the fixed-bed design is used.
The average of values obtained during one year is calculated from the averages of values obtained during each day (at least three spot samples taken at intervals of at least half an hour).
Purified EDC is the sum of EDC produced by oxychlorination and/or direct chlorination and of EDC returned from VCM production to purification.
Parameter
BAT-AEL(average of values obtained during 1 year)
Copper
0,04–0,2 g/t EDC produced by oxychlorination
EDC
0,01–0,05 g/t EDC purified
PCDD/F
0,1– 0,3 μg I-TEQ/t EDC produced by oxychlorination
The associated monitoring is in BAT 79.

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Source: https://www.legislation.gov.uk/eudn/2017/2117/annex/division/10/division/10.2/division/BAT+81 (the official version)
Page: https://openlegislation.uk/eu-decision-2017-2117/annex/division-10/division-10.2/division-BAT+81
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.