Division DEFINITIONS
United Kingdom
For the purposes of these BAT conclusions, the following definitions apply:
| Term used | Definition |
|---|---|
| New plant | A plant first permitted at the site of the installation following the publication of these BAT conclusions or a complete replacement of a plant following the publication of these BAT conclusions. |
| Existing plant | A plant that is not a new plant. |
| Biochemical oxygen demand (BOD5) | Amount of oxygen needed for the biochemical oxidation of the organic matter to carbon dioxide in 5 days. BOD is an indicator for the mass concentration of biodegradable organic compounds. |
| Chemical oxygen demand (COD) | Amount of oxygen needed for the total oxidation of the organic matter to carbon dioxide. COD is an indicator for the mass concentration of organic compounds. |
| Total organic carbon (TOC) | Total organic carbon, expressed as C, includes all organic compounds. |
| Total suspended solids (TSS) | Mass concentration of all suspended solids, measured via filtration through glass fibre filters and gravimetry. |
| Total nitrogen (TN) | Total nitrogen, expressed as N, includes free ammonia and ammonium (NH4-N), nitrites (NO2-N), nitrates (NO3-N) and organic nitrogen compounds. |
| Total inorganic nitrogen (Ninorg) | Total inorganic nitrogen, expressed as N, includes free ammonia and ammonium (NH4-N), nitrites (NO2-N) and nitrates (NO3-N). |
| Total phosphorus (TP) | Total phosphorus, expressed as P, includes all inorganic and organic phosphorus compounds, dissolved or bound to particles. |
| Adsorbable organically bound halogens (AOX) | Adsorbable organically bound halogens, expressed as Cl, include adsorbable organically bound chlorine, bromine and iodine. |
| Chromium (Cr) | Chromium, expressed as Cr, includes all inorganic and organic chromium compounds, dissolved or bound to particles. |
| Copper (Cu) | Copper, expressed as Cu, includes all inorganic and organic copper compounds, dissolved or bound to particles. |
| Nickel (Ni) | Nickel, expressed as Ni, includes all inorganic and organic nickel compounds, dissolved or bound to particles. |
| Zinc (Zn) | Zinc, expressed as Zn, includes all inorganic and organic zinc compounds, dissolved or bound to particles. |
| VOC | Volatile organic compounds as defined in Article 3(45) of Directive 2010/75/EU. |
| Diffuse VOC emissions | Non-channelled VOC emissions which can result from ‘area’ sources (e.g. tanks) or ‘point’ sources (e.g. pipe flanges). |
| Fugitive VOC emissions | Diffuse VOC emissions from ‘point’ sources. |
| Flaring | High-temperature oxidation to burn combustible compounds of waste gases from industrial operations with an open flame. Flaring is primarily used for burning off flammable gas for safety reasons or during non-routine operational conditions. |