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Research unit
FOEN
Project number
ExSt.2023.1460
Project title
Estimation of Greenhouse Gas Emissions from On-Site Wastewater Management in Switzerland

Inserted texts


CategoryText
Key words
(German)
Klima, Studien
Key words
(English)
Climate, Studies
Key words
(French)
Climat, Études
Key words
(Italian)
Clima, Studi
Short description
(English)
In Switzerland, only about 2.7% of the population are currently not connected to public sewer networks. The 2.7 % can be further classified as i) farms which collect their sewage together with animal manure and ii) residential buildings with on-site and decentralised sanitation solutions such as small-scale wastewater treatment plants (SSWWTPs) or septic tanks. To date, the inventories of greenhouse gas (GHG) emissions from wastewater management in Switzerland have taken into account the public systems only, i.e., the municipal and industrial sewerage, wastewater treatment and sludge management systems. So far, on-site and decentralised wastewater management systems have not been considered. This is based on the assumption that the 2.7% of wastewater managed on-site does not contribute significantly to the GHG emissions due to low water temperatures which prevent the generation of methane (CH4). This assumption is, however, questionable, as temperatures are not constantly low, especially during summer months and in lower-lying areas.
Related documents
Contractor
(English)
Vuna GmbH, Dübendorf
Charged budget
(English)
BAFU
Legal basis
(English)
Art. 57 Abs. 1 RVOG | Art. 57 al. 1 LOGA. | Art. 57 cpv. 1 LOGA
Copyright
(English)
Copyright, Bundesbehörden der Schweizerischen Eidgenossenschaft | Droits d'auteur: autorités de la Confédération suisse | Diritti d'autore: autorità della Confederazione Svizzera | Dretgs d'autur: autoritads da la Confederaziun svizra | Copyright, Swiss federal authorities
Information
(English)
BAFU, Abteilung Klima, 3003 Bern