Français
1. Physico-chemical treatment of urban wastewater
Physical-chemical water treatment encompasses a number of techniques, such as mixing and aeration, and clarification by decantation. The most widespread method is coagulation-flocculation.
This technique involves adding coagulants to the water, which have the ability to group suspended particles into large aggregates. This facilitates their subsequent removal. The usual methods for separating these aggregates, whether coagulated or flocculated, include filtration, settling at the bottom of the basin (by the action of gravity) or aeroflotation, which involves sending jets of air to bring the particles to the surface of the water.
Let's take a closer look at this sector.
This technology requires the use of large quantities of reagents, which means high operating costs.
...
The Ultimate Scientific and Technical Reference
This article is included in
Public works and infrastructure
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Physico-chemical treatment of urban wastewater
Biological techniques for intensive ERU treatment: the basics
Bibliography
Websites
Ateliers d'Occitanie – Wastewater and effluent treatment
https://www.ateliers-occitanie.fr/traitement-eaux-usees-effluents/
Eaufrance – The public water information service
...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 no. 91/271/EEC of May 21, 1991 concerning urban waste-water treatment.
Law no. 92-3 of January 3, 1992 on water.
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 Repealed by Decree n°2000-318 of April 7, 2000.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 du 2 mai 2006 relatif à la collecte et au traitement des eaux usées mentionnées aux articles...
The Ultimate Scientific and Technical Reference
