{
  "url": "https://openlegislation.uk/eu-decision-2017-1442/annex/division-5/division-5.1/division-5.1.4/division-1",
  "json_url": "https://openlegislation.uk/eu-decision-2017-1442/annex/division-5/division-5.1/division-5.1.4/division-1.json",
  "legislation": "eudn/2017/1442",
  "legislation_title": "Commission Implementing Decision (EU) 2017/1442 of 31 July 2017 establishing best available techniques (BAT) conclusions, under Directive 2010/75/EU of the European Parliament and of the Council, for large combustion plants (notified under document C(2017) 5225) (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-decision-2017-1442",
  "path": "annex/division/5/division/5.1/division/5.1.4/division/1",
  "kind": "division",
  "number": "BAT 57",
  "heading": "In order to reduce SOX, HCl and HF emissions to air from the combustion of process fuels from the chemical industry in boilers, BAT is to use one or a combination of the techniques given below.",
  "text": "Technique\nDescription\nApplicability\na.\nFuel choice\nSee descriptions in Section 8.4\nApplicable within the constraints associated with the availability of different types of fuel and/or an alternative use of the process fuel\nb.\nBoiler sorbent injection (in-furnace or in-bed)\nApplicable to existing combustion plants within the constraints associated with duct configuration, space availability and chemical installation safety.\nWet FGD and seawater FGD are not applicable to combustion plants operated < 500 h/yr.\nThere may be technical and economic restrictions for applying wet FGD or seawater FGD to combustion plants of < 300 MWth, and for retrofitting combustion plants operated between 500 h/yr and 1 500 h/yr with wet FGD or seawater FGD\nc.\nDuct sorbent injection (DSI)\nd.\nSpray dry absorber (SDA)\ne.\nWet scrubbing\nSee description in Section 8.4.\nWet scrubbing is used to remove HCl and HF when no wet FGD is used to reduce SOX emissions\nf.\nWet flue-gas desulphurisation (wet FGD)\nSee descriptions in Section 8.4\ng.\nSeawater FGD\nTable 35\nBAT-associated emission levels (BAT-AELs) for SO2 emissions to air from the combustion of 100 % process fuels from the chemical industry in boilers\nFor existing plants operated < 1 500 h/yr, these BAT-AELs do not apply.\nFor existing plants operated < 500 h/yr, these levels are indicative.\nType of combustion plant\nBAT-AELs (mg/Nm3)\nYearly average\nDaily average or average over the sampling period\nNew and existing boilers\n10–110\n90–200\nTable 36\nBAT-associated emission levels (BAT-AELs) for HCl and HF emissions to air from the combustion of process fuels from the chemical industry in boilers\nFor plants operated < 500 h/yr, these levels are indicative.\nIn the case of plants operated < 1 500 h/yr, the higher end of the BAT-AEL range is 20 mg/Nm3.\nIn the case of plants operated < 1 500 h/yr, the higher end of the BAT-AEL range is 7 mg/Nm3.\nCombustion plant total rated thermal input(MWth)\nBAT-AELs (mg/Nm3)\nHCl\nHF\nAverage of samples obtained during one year\nNew plant\nExisting plant\nNew plant\nExisting plant\n< 100\n1–7\n2–15\n< 1–3\n< 1–6\n≥ 100\n1–5\n1–9\n< 1–2\n< 1–3",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "footnote",
      "label": "f1",
      "text": "For existing plants operated < 1 500 h/yr, these BAT-AELs do not apply."
    },
    {
      "type": "footnote",
      "label": "f2",
      "text": "For existing plants operated < 500 h/yr, these levels are indicative."
    },
    {
      "type": "footnote",
      "label": "f3",
      "text": "For plants operated < 500 h/yr, these levels are indicative."
    },
    {
      "type": "footnote",
      "label": "f4",
      "text": "In the case of plants operated < 1 500 h/yr, the higher end of the BAT-AEL range is 20 mg/Nm3."
    },
    {
      "type": "footnote",
      "label": "f5",
      "text": "In the case of plants operated < 1 500 h/yr, the higher end of the BAT-AEL range is 7 mg/Nm3."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eudn/2017/1442/annex/division/5/division/5.1/division/5.1.4/division/1",
    "retrieved_at": "2026-11-01T15:13:23.628050+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."
}