---
title: "BAT-AEL / BREF"
description: "BAT (Best Available Techniques) is the EU concept defining the most effective and advanced stage of process design and operation. BREF documents (BAT Reference Documents) describe BAT for individual industrial sectors. BAT-AEL (BAT-Associated Emission Levels) are the emission-limit ranges that operators using BAT can be expected to achieve."
canonical_url: "https://sylio.co/glossary/bat-ael-bref"
last_updated: "2026-06-28T02:29:38.288Z"
---

**BAT** (Best Available Techniques) is the EU concept defining the most effective and advanced stage of process design and operation. **BREF** documents (BAT Reference Documents) describe BAT for individual industrial sectors. **BAT-AEL** (BAT-Associated Emission Levels) are the emission-limit ranges that operators using BAT can be expected to achieve.

## Key BREFs for Sylio applications

<table>
<thead>
  <tr>
    <th>
      BREF
    </th>
    
    <th>
      Industry sector
    </th>
  </tr>
</thead>

<tbody>
  <tr>
    <td>
      LCP BREF
    </td>
    
    <td>
      Large Combustion Plants (coal, oil, gas, biomass)
    </td>
  </tr>
  
  <tr>
    <td>
      WI BREF
    </td>
    
    <td>
      Waste Incineration
    </td>
  </tr>
  
  <tr>
    <td>
      CLM BREF
    </td>
    
    <td>
      Cement, Lime and Magnesium oxide
    </td>
  </tr>
  
  <tr>
    <td>
      FMP BREF
    </td>
    
    <td>
      Ferrous Metals Processing
    </td>
  </tr>
  
  <tr>
    <td>
      NFM BREF
    </td>
    
    <td>
      Non-Ferrous Metals
    </td>
  </tr>
  
  <tr>
    <td>
      REF BREF
    </td>
    
    <td>
      Refining of Mineral Oil and Gas
    </td>
  </tr>
  
  <tr>
    <td>
      LVOC BREF
    </td>
    
    <td>
      Large Volume Organic Chemicals
    </td>
  </tr>
</tbody>
</table>

[Industrial Emissions Directive](/glossary/industrial-emissions-directive) permits in the EU must set emission limits within the BAT-AEL ranges from the relevant BREF. National authorities ([BImSchV](/glossary/bimschv) in Germany, equivalent agencies elsewhere) enforce.

## Related terms

- [Industrial Emissions Directive (IED)](/glossary/industrial-emissions-directive)
- [BImSchV](/glossary/bimschv)
- [Waste-to-energy](/glossary/waste-to-energy)