{
  "url": "https://openlegislation.uk/eu-decision-2014-738/annex/division-4/division-1.21/division-1.21.2",
  "json_url": "https://openlegislation.uk/eu-decision-2014-738/annex/division-4/division-1.21/division-1.21.2.json",
  "legislation": "eudn/2014/738",
  "legislation_title": "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)",
  "legislation_url": "https://openlegislation.uk/eu-decision-2014-738",
  "path": "annex/division/4/division/1.21/division/1.21.2",
  "kind": "division",
  "number": "1.21.2",
  "heading": "Waste water treatment",
  "text": "Technique\nDescription\nRemoval of insoluble substances by recovering oil.\nThese techniques generally include:\nAPI Separators (APIs)\nCorrugated Plate Interceptors (CPIs)\nParallel Plate Interceptors (PPIs)\nTilted Plate Interceptors (TPIs)\nBuffer and/or equalisation tanks\nRemoval of insoluble substances by recovering suspended solid and dispersed oil\nThese techniques generally include:\nDissolved Gas Flotation (DGF)\nInduced Gas Flotation (IGF)\nSand Filtration\nRemoval of soluble substances including biological treatment and clarification\nBiological treatment techniques may include:\nFixed bed systems\nSuspended bed systems.\nOne of the most commonly used suspended bed system in refineries WWTP is the activated sludge process. Fixed bed systems may include a biofilter or trickling filter\nAdditional treatment step\nA specific waste water treatment intended to complement the previous treatment steps e.g. for further reducing nitrogen or carbon compounds. Generally used where specific local requirements for water preservation exist.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "X",
      "label": "X1",
      "text": "Inserted by Corrigendum to Commission Implementing Decision 2014/738/EU 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 (Official Journal of the European Union L 307 of 28 October 2014)."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eudn/2014/738/annex/division/4/division/1.21/division/1.21.2",
    "retrieved_at": "2026-11-01T15:14:36.977162+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}