Emission intensity

The emission factor is the ratio of the mass of a released ( emitted ) to the substance of the mass used a starting material. The emission factor is material - and process- specific, ie it is dependent on

• The starting material,
• The process ( eg incineration or bulk handling ),
• The observed ( emitted ) fabric.

Multiplying the amount of starting material with the specific for the released substance and the process emission factor used, then the emitted amount to be determined.

Example: The emission factor for the release of dust during handling of gravel was 1.5 kg / t. If 2 tons of gravel handled (eg, loaded onto a truck ), 2 t * 1.5 kg / t = 3 kg released dust.

Emission factors are material - and process- specific determined and tabulated. For fuels (eg natural gas ), the emission factor also be related to the energy content ( heating value or calorific value ).

If a longer process considered, the temporal component must be included. The emissions of flame retardants from TV sets during the use phase are given for example in mass fractions per year.

Commodity emission factors

A were related emission factor is defined as the mass fraction of organic and inorganic substances that may be emitted at a particular process and under defined process conditions of a certain quantity of goods. In textile finishing processes two different types can be distinguished:

• G org. Carbon / kg dry
• G compound / kg textile

The latter emission factor is used when a particular substance ( for example, toxic or dangerous for the environment ) interested.