Projects

Biological wastewater treatment plant

2024 - 2026
Uebersyren

Category

Civil EngineeringPublic

Biological wastewater treatment plant

In Uebersyren, Sidest entrusted us with the construction of its new biological wastewater treatment plant.

Built in 1991, the current wastewater treatment plant treats urban wastewater from several neighbouring municipalities as well as wastewater from the airport. But after more than three decades in service, it has reached its maximum capacity. Faced with demographic change and growing needs, Sidest has decided to double the plant's treatment capacity, from 35,000 to 122,000 population equivalents.

The project involves the construction of an imposing infrastructure: 146 metres long, 65 metres wide and 13 metres high, including pools and technical facilities. The work will be carried out in an enclosure that has been excavated and reinforced beforehand, at a depth of 15 metres.

31,600 m3

Concrete

5,473 t

Framework

58,650 m2

Formwork

17,145 m2

Waterproofing membranes

15,520 m3

Backfill

A monumental project

The particularity of this project lies in the massive quantities of concrete and steel needed to create the reinforced concrete, which will guarantee the solidity and watertightness of the whole structure.

For example, the clean concrete covers an area of 9,500 m2 and is 15 cm high. The invert is a good one metre thick. The challenge lies mainly in the high rate of reinforcement and concreting. The site was divided into 15 zones to optimise the schedule. This is why we are pre-assembling the columns and walls.