CEN/TC 165/WG 8 - Separators

This standard deals with installations for the separation of light liquids (e.g. oil and petrol), i.e. those with a density up to 0.95 g/cm3 from waste water by means of gravity and/or coalescence. The standard is not primarily intended to apply to installations that are required to treat large quantities of trade effluent (e.g., oil refinery effluent). The standard may, however, still be appropriate for this purpose depending on local requirements.

This standard specifies definitions, nominal sizes, principles of design, performance requirements, marking, testing and quality control for grease separators.
This standard applies to separators for the separation of greases and oils of vegetable and animal origin from wastewater by means of gravity and without any external energy.
This standard does not cover grease separators intended to treat domestic wastewater from kitchen areas of single family dwellings, where the separator has a nominal size less than 1.
The standard is not applicable for the separation of light liquids, e.g. petrol, fuel and heating oil, and does not cover the treatment of wastewater exclusively containing stable emulsions of greases and oils.
The standard does not cover the use of biological means (bacteria and enzymes).

This standard specifies requirements on selection of nominal sizes, installation, operation and maintenance of grease separators in accordance with prEN 1825-1:1998. This standard does not apply to waste water containing light liquids, e.g. grease or oils of mineral origin, and does not include treating stable emulsions of grease or oil in water. The standard does not cover the use of biological means (bacteria, enzymes for so-called "self-cleaning").

This standard specifies definitions, principles of sizing, installation, operation and maintenance of separator systems for light liquids in accordance with prEN 858-1:1997 as well as requirements and test methods for cleansing agents discharged with the waste water into the separator system. When pollution control requires the treatment of pollutants other than light liquids, additional measures shall be necessary.

This standard deals with installations for the separation of light liquides (e.g. oil and petrol), i.e. those with a density up to 0.95 g/cm3 from waste water by means of gravity and/or coalescence. The standard is not primarily intended to apply to installations that are required to treat large quantities of trade effluent (e.g., oil refinery effluent). The standard may, however, still be appropriate for this purpose depending on local requirements.