4. Pre-treatment processes upstream of the settling tank

4.1 Screens

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4.1.1 Principle

Screening is an essential preliminary operation in the treatment of ERU. It is a preliminary step, designed to remove bulky solids and debris from the ERU.

A bar screen is made up of bars, grids or sieves that hold back larger objects such as leaves, branches, plastics, solid waste, etc. These items are retained on the surface of the bar screen, while the water passes through the spaces between the bars, grids, etc.. These items are retained on the surface of...

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Pre-treatment processes upstream of the settling tank

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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

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