6. Horizontal flow planted filters

6.1 Primary treatment: principle

This system must be preceded by primary treatment (settling tank, settling lagoon, vertical flow planted filter, etc.).

In filtration systems designed for horizontal flow (Figures 13 and 14 ), the filter bed is almost completely immersed in the water. The effluent to be treated is distributed evenly over the entire surface and depth of the filter bed by means of an effluent distribution device located at one end of the filtration basin.

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Bibliography

(1) - Agence de l'Eau Rhin-Meuse - Procédés d'épuration des petites collectivités du bassin Rhin-Meuse : éléments de comparaison techniques et économiques. - (2007).
(2) - ALEXANDRE (O.), BOUTIN (C.), DUCHENE (P.), LAGRANGE (C.), LAKEL (A.), LIENARD (A.), ORDITZ...

Websites

Eaufrance – The public water information service

https://www.eaufrance.fr/

eCompendium – A tool for planning sanitation solutions for the different phases of an emergency.

https://www.emersan-compendium.org/fr/

...

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