# 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 54:: In order to reduce the waste water volume and to reduce the organic load discharged from the product purification to final waste water treatment, BAT is to use one or both of the techniques given below.

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

Technique
Description
Applicability
a.
Use of the purge from the EO plant in the EG plant
The purge streams from the EO plant are sent to the EG process and not discharged as waste water. The extent to which the purge can be reused in the EG process depends on EG product quality considerations.
Generally applicable
b.
Distillation
Distillation is a technique used to separate compounds with different boiling points by partial evaporation and recondensation.
The technique is used in EO and EG plants to concentrate aqueous streams to recover glycols or enable their disposal (e.g. by incineration, instead of their discharge as waste water) and to enable the partial reuse/recycling of water.
Only applicable to new plants or major plant upgrades

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Source: https://www.legislation.gov.uk/eudn/2017/2117/annex/division/6/division/6.3/division/BAT+54 (the official version)
Page: https://openlegislation.uk/eu-decision-2017-2117/annex/division-6/division-6.3/division-BAT+54
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.