The Emission Factors Database

Transcription

1 The Emission Factors Database ETC Water Copenhague, Denmark 15 th October 2004

2 Definition of the emission factor and objective of the database An emission factor is the estimated average emission rate of a given pollutant for a given source, relative to units of activity. It can be expressed by a quantity or by a concentration. Objective of the project : to gather emission factors from various sources in an easy-to-use database. Objective of the database : to give a reliable information to estimate emissions to water, for a given source and a given pollutant.

3 Context One of the activities of the task 12 developed by the EEA was the organisation of dataflows for the development of indicators. A need to have access to methodologies for the estimation of emissions, similar to what have been developed for air, has been expressed. Emission factors applied to available statistical or administrative data are used to give a proxy indication of the level of emission. IOW proposed to develop a database of various emission factors in collaboration with voluntary partners.!

4 Usefulness of the emission factor An emission factor can be used to estimate the emission load for a similar case. Exemple : For a manufacture of dyes and pigments (NACE code : 24.12), 10,64 g of Zinc and compounds are discharged per year and for 1000 kg of manufactured dyes and pigments, before urban treatment. - Industry characteristics similar - Production of 20 tons of dyes and pigments per year 20 x 10,64 = 212,8 g of Zinc discharged in waste waters per year

5 Emission factor formula EF = Ec x CV With EF : Emission Factor Ec : Emission (in kg for example) CV : Characteristic Value, in a characteristic value unit (kg of finish product, for example) Example for an industry of printing on wool : EF = 1,33 kg of chromium per ton of textile dyed Ec CV

6 Information required Pollutant source: Any type of source is welcome (industries, transports, household diffuse or point sources). Substance: associated with the CAS code. Emission factor (average, maximum, minimum or median value, or a formula) associated to a unit, and a characteristic value. Discharge step (raw or net pollution), and the type of treatment (industrial, urban, independent, or no treatment) Information concerning the context of the emission factor: date of the measure, place precision, comments, application sector of the emission factor "

7 Organisation of the database main tables structure #

8 Data conceptual model $

9 Application The aim of the database is to provide emission factors after a selection on one or two fields. Possibility to have emission factors linked to :! %

10 Available data Supplier Kees Baas Rudy Vannevel and Koor Van Hoof Michael Nagy Mario Zec, Danijela Sabic Kaia Oras Organism Statistics Netherlands (CBS), Task group of Environment Statistics Vlaamse Milieumaatschappij (Belgium) Umweltundesamt (Austria) Environmental Agency of the Republic of Slovenia, Water Quality Section Statistical Office of Estonia PRB Odense French Water Agencies Description Households and Industries emissions Several diffuse sources of metals: Households, agriculture, traffic and transports, Municipal point source pollution Industries emissions Households emissions Diffuse sources - transport by flows Industries emissions

11 Available data Examples of emission factors given by Kees Baas (Statistics Netherlands) : Household (NFR code : 6.B.2) : 4,285 kg of total Nitrogen are discharged per year and per inhabitant in the Netherlands, before urban treatment. Manufacture of dyes and pigments (NACE code : 24.12) : 10,64 g of Zinc and compounds are discharged per year and for 1000 kg of manufactured dyes and pigments, before urban treatment.

12 Available data Exemples of emission factors given by Rudy Vannevel (Vlaamse Milieumaatschappij Belgium) : Metabolic household : 340 µg of Zinc per liter of waste water. This data is available for a waste water debit of 136 L per day per inhabitant. Traffic (main regional roads) : 1,731 kg of Cadmium per ha of road

13 Available data September emission factors provided by partners included in the database to be included after processing.!

14 Database operation First step: choose a search type :

15 Database operation Then, choose a substance : And a pollutant source :

16 Results part «result» "#"$$"% "

17 Results part «details» #

18 Results part «references» "#"$$""$"" $

19 Conclusion Progress with the emission factors database: Data gathered into a unique database. Easy utilisation, no need to know how Microsoft Access works. Easy access (but restricted) on the IOW Internet site. Future developments: A better data collection. Selection of emission factors by other ways: discharge step, characteristic value Extend the access of data for information of the public. %