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5. All-water tanks for very small communities
5.1 Principle and design
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Principle
For very small facilities (less than or equal to 200 p.e.), the use of an all-water tank (figure 19 ) remains a best practice among others.
This type of pit collects all domestic wastewater, including that from showers and household activities such as cooking and laundry. Rainwater, on the other hand, should not be connected to this system. Their highly variable volume would cause malfunctions.
The all-water tank provides preliminary treatment, not the first stage of treatment.
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All-water tanks for very small communities
Decanter digesters
Bibliography
Websites
General Commission for Sustainable Development
https://www.ecologie.gouv.fr/commissariat-general-au-developpement-durable-cgdd
Eaufrance
https://www.eaufrance.fr/lassainissement-des-eaux-usees-domestiques
...Standards and norms
- Wastewater treatment plants – Part 1: General principles of construction: specifies the general principles of design, construction and installation of technical equipment for wastewater treatment plants. - NF EN 12255-1 - avril 2002
- Wastewater treatment plants – Part 3: Pretreatments: specifies applications, procedures and performance requirements for raw wastewater pretreatments. - NF EN 12255-3 - avril 2001 ...
Regulations
Directive 91/271/EEC of May 21, 1991 concerning urban waste-water treatment
Law no. 92-3 of January 3, 1992 on water,
LAW no. 2006-1772 of December 30, 2006 on water and aquatic environments
Decree no. 94-469 of June 3, 1994 on wastewater collection and treatment. Repealed by Decree n°2000-318 of April 7, 2000
Décret n° 2006-503...
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