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Current projects

Back to all projects

SADE’s expertise in wastewater treatment consolidated by 2 recent projects for the Poitiers-Metz RD.

March 6, 2023

SADE won two long-term work orders in Pont-d’Ain and Chavanoz, which began in May 2022 and are scheduled for completion in the second half of 2023. SADE is carrying out the sizing, execution plans, operation management, networks and all equipment, including electricity and automations. 

The aim is to inaugurate the Pont d’Ain on 8 September 2023!

The task is to build a brand new 5000PE treatment plant and demolish the existing facilities located in the immediate vicinity. The mayor of the commissioning municipality set the inauguration of the new WWTP for 8 September 2023.

The goal is thus clear, and given the scale of works and their launch in May 2022, the teams will have to be particularly efficient, specifically in terms of supply lead times for electrical and electronic equipment.

Building impressive facilities

In this new activated sludge WWTP, the effluent enters via a pre-treatment facility consisting of a screen, grit chamber and grease trap, and flows into a 3-zone (contact /anaerobic/aerobic) aeration basin, a 16m-diameter, 6m-deep concrete structure with a useful capacity of 1,230m³.

Following pre-treatment, the water continues on its path to a degasser, then an 800m3, 16m-diameter clarifier equipped with a scraper bridge. It ends its journey via a tertiary membrane filter, a UV channel and a metering duct before its discharge into the Suran, which joins the River Ain a few hundred metres further along. To prevent the risk of flooding on the site, due to a 100-year floodplain, most of the facilities are above ground and located at a height.

Enhanced treatment

As the discharge zone is located in the immediate vicinity of a protected area, the treatment process is specifically adapted for reinforced nitrogen and phosphor treatment. The sludge extracted from the clarifier will be treated in a spinner prior to evacuation and recycling.

Chavanoz, two years of works

The Lyon Saint-Exupéry en Dauphiné Community of Districts (LYSED) entrusted the extension of its activated sludge wastewater treatment plant (27,000 to 40,000PE) and the rehabilitation of existing facilities, without service stoppage, to the consortium led by SADE. This represents a two-year project in a sensitive environment with a high level of co-activity alongside the site operator, Veolia.

Imposing new facilities

The specifics of the 2 main facilities to be built in the context of this extension are enough to realise the vast scale of this project, the plans for which were produced by SADE Engineering. The 3600m³ aeration basin, equipped with 4 surface turbines, measures 32m x 32m. The circular clarifier, equipped with a sucking/ scraping bridge, measures 35m in diameter for a volume of 3000m³. Added to these structures are numerous networks and associated facilities, in particular a collector system for residue sludge.

Service continuity

Service continuity is a key element in the organisation of this project. Nothing must interfere or compromise the quality of effluent treatment. Operations are subject to precise phasing determined in association with the operator, who issues the work permits.

2 high points

The two high points of this project will be the commissioning of the new facilities with stoppage of the existing one for its rehabilitation, followed by the connection of all built and rehabilitated facilities to form a high-performance ensemble capable of treating 10,400m³ per day in rainy weather, with a top flow rate of 950m³ per hour.

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23-25 av. du Docteur Lannelongue
75014 Paris

  • IN BRIEF
    • Profile
    • Anchoring
    • Path
  • PROFESSIONS
    • Systems
    • Infrastructure
  • SERVICES & SOLUTIONS
    • Regional authorities
    • Industries
    • Major infrastructures
  • REFERENCES
  • CSR
  • APPLICATIONS
  • NEWS
  • CONTACT

Legal notice Ι Anticorruption code of conduct Ι Occupational gender equality index Ι Personal Data Protection Policy Ι Suppliers relationship © 2021 All rights reserved

Fraud Warning

It has come to our attention that emails have been sent by individuals falsely claiming to be SADE employees. The objective of these emails is to place false orders using our company’s name. Read more…

In the emails detected to date, the fraudsters are writing from the addresses “[email protected]” or “[email protected]”. They use our logo and Paris 75014 address.

We wish to draw your attention to the fact that these email addresses do not correspond to SADE’s email address, which bears the domain name sade-cgth.fr.

We thus advise caution in your communication and request that you do not exchange documents or information with persons other than your usual contacts at SADE. If you are in any doubt, we advise you to speak to your usual contacts prior to the transmission of any document or information.

As fraudsters regularly change their operating mode, we also recommend you alert all your employees likely to have dealings in this area (purchasing, accounting or payroll, etc.).

SADE systematically lodges an official complaint in response to such acts. We would be grateful if you could notify us at the following address of any contact you may have had with individuals claiming to be employees of our company: [[email protected]]