# Commission Implementing Decision of 28 February 2012 establishing the best available techniques (BAT) conclusions under Directive 2010/75/EU of the European Parliament and of the Council on industrial emissions for iron and steel production (notified under document C(2012) 903) (Text with EEA relevance) (2012/135/EU), Division 67

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

BAT for treating waste water from blast furnace gas treatment is to use flocculation (coagulation) and sedimentation and the reduction of easily released cyanide, if necessary.
The BAT-associated emission levels, based on a qualified random sample or a 24-hour composite sample, are:
— suspended solids < 30 mg/l
— iron < 5 mg/l
— lead < 0,5 mg/l
— zinc < 2 mg/l
— cyanide (CN-), easily released < 0,4 mg/l.

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Source: https://www.legislation.gov.uk/eudn/2012/135/annex/division/3/division/1.5/division/2/division/67 (the official version)
Page: https://openlegislation.uk/eu-decision-2012-135/annex/division-3/division-1.5/division-2/division-67
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.