5.D.1 - Domestic & Commercial Wastewater Handling

Last updated on 16 Apr 2019 09:29 (cf. Authors)

Short description

NFR-Code Name of Category Method AD EF Key Category 1
5.D.1 Domestic & Commercial Wastewater Handling T1 NS D no key category

In category 5.D.1, NMVOC emissions from domestic and commercial wastewater handling are reported. The domestic section is covered by wastewaters of municipal origin (large centralised plants; ranging from 1,000 up to >100,000 resident values). The commercial section is covered by industrial and commercial wastewaters, co-treated in municipal wwt-plants.

Method

Emissions reported under this category are calculated using the Tier 1 approach of the EMEP/EEA Guidebook 2016 [1], where the emission factor (EF) is 15 mg/m³ wastewater (Part B, 5.D, chap. 3.2.2, Table 3-1, p. 7). This EF is multiplied with the total amount of wastewater (AD) treated in domestic and commercial wwt-plants, following the equation:

EM(NMVOC) = AD * EF (ibid., chap. 3.2.1).

Activity data

Total volumes of treated municipal wastewater are derived by the German statistical agency (Statistisches Bundesamt, Fachserie 19, Reihe 2.1.2) [2]. The data source is published on a three year basis with new data only for the respective year of the update. The availability of the data starts in 1991 with an exception for the following update, which was for 1995. Missing data are inter- or extrapolated

Emisson factors

See "Method"

Uncertainties

The AD from Statistisches Bundesamt have an uncertainty of ±3% whereas the uncertainty for the EF is -5/+50%.

Recalculations

Due to a review recommendation, emissions from domestic origin and septic tanks had to be removed from the estimation due to being decentralised technologies, thus recalculations were necessary.

1990 1995 2000 2005 2010 2011 2012 2013 2014 2015 2016 2017
2018 0.134 0.154 0.156 0.147 0.152 0.151 0.150 0.149 0.148 0.147 0.146 -
2019 0.125 0.148 0.153 0.144 0.150 0.149 0.148 0.147 0.147 0.146 0.145 0.144
absolute change -0.008 -0.006 -0.003 -0.002 -0.002 -0.002 -0.002 -0.002 -0.002 -0.002 -0.002 -

Planned improvements

Currently no improvements are planned.


Bibliography
1. EMEP/EEA, 2016: EMEP/EEA air pollutant emission inventory guidebook 2016, Copenhagen, 2016.
2. Statistisches Bundesamt, Fachserie 19, Reihe 2.1.2: Öffentliche Abwasserbehandlung und -entsorgung; URL: https://www.destatis.de/DE/Themen/Gesellschaft-Umwelt/Umwelt/Wasserwirtschaft/Publikationen/Downloads-Wasserwirtschaft/abwasser-oeffentlich-2190212169004.pdf?__blob=publicationFile&v=6; Wiesbaden, 2018.
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