# Commission Implementing Decision of 9 October 2014 establishing best available techniques (BAT) conclusions, under Directive 2010/75/EU of the European Parliament and of the Council on industrial emissions, for the refining of mineral oil and gas (notified under document C(2014) 7155) (Text with EEA relevance) (2014/738/EU), Division BAT 20: In order to reduce emissions to water from the hydrofluoric acid alkylation process, BAT is to use a combination of the techniques given below.

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

Technique
Description
Applicability
(i)
Precipitation/Neutralisation step
Precipitation (with, e.g. calcium or aluminium-based additives) or neutralisation (where the effluent is indirectly neutralised with potassium hydroxide (KOH))
Generally applicable.
Safety requirements due to the hazardous nature of hydrofluoric acid (HF) are to be considered
(ii)
Separation step
The insoluble compounds produced at the first step (e.g. CaF2 or AlF3) are separated in e.g. a settlement basin
Generally applicable

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Source: https://www.legislation.gov.uk/eudn/2014/738/annex/division/3/division/1.2/division/1.2.1/division/BAT (the official version)
Page: https://openlegislation.uk/eu-decision-2014-738/annex/division-3/division-1.2/division-1.2.1/division-BAT
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.