2. Pre-treated effluent treatment techniques and water disposal
Domestic wastewater treatment and drainage can be carried out jointly in a single soil-based system, or separately, with a system providing only treatment, with the drainage function devolved either to the soil or to the surface water environment.
The combined treatment and disposal of septic effluent involves two systems in natural soil: underground seepage through trench filtering and seepage beds. Treatment in a reconstituted filter bed prior to infiltration into natural soil also calls for two systems: spreading in an undrained sand filter bed, and the infiltration mound (above-ground undrained sand bed).
Two systems are used for purification prior to discharge into the surface water environment: the vertical-flow drained filter bed on a sand bed and the vertical-flow drained filter bed on a zeolite bed. A third system, the horizontal...
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Pre-treated effluent treatment techniques and water disposal
Conclusion and outlook
References
Regulations
Arrêté du 6 mai 1996 fixant les prescriptions techniques applicables aux systèmes d'assainissement non collectif (JO n° 132 du 8 juin 1996, page 8472).
Order of May 6, 1996 setting the terms and conditions for technical inspection of non-collective sanitation systems by municipalities (JO n° 132 of June 8, 1996, page 8475).
Circular no. 97-49 of May 22, 1997 on non-collective...
Standardization
French Standards Association (AFNOR)
- Grease traps – Part 1: Principles for design, performance and testing, marking and quality control. - NF EN 1825-1 - 2004
- Grease separation systems – Part 2: Nominal size selection, installation, service and maintenance. - NF EN 1825-2 - 2002
- Small wastewater treatment plants up to 50 ETPs – Part 1: Prefabricated septic tanks. - NF EN 12566-1 - 2000
- Small...
Manufacturers
EPARCO Sanitation
Ponsel
IFAA (syndicat des industriels français de l'assainissement autonome, list of members available on their website)
Websites
IFAA http://www.french-water.com/Ifaa/Ifaaadherents.htm
Wallonia's environment portal http://environnement.wallonie.be/
List of approved individual wastewater treatment systems in Wallonia
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