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Article | REF: C5220 V3

Urban wastewater treatment - Concepts, pumping and pretreatment facilities

Author: Jean-Marc BERLAND

Publication date: April 10, 2024

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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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