Sewerage and drinking water networks

Our engineering department has a wide range of skills to support you and carry out ventilation studies for all excavation or maintenance work carried out in the sewerage or drinking water networks.

Identification of the current situation

During the realisation of ventilation studies for sewerage and drinking water networks, our design office initially carries out audits, expert appraisals and technical visits allowing our engineers :

  • Identification of the standards in force
  • Determination of the needs adapted to the constraints
  • On-site technical visit if necessary

Determination of the ventilation concept

The whole objective is now to determine a ventilation concept capable of meeting the specifics of the project. Therefore, the most economical and ecological ventilation concept must be defined by selecting high-efficiency fans, suitable duct diameters and materials. For example, an increase of a few millimeters in duct diameter will result in an electrical saving of several kilowatts. 

For this purpose, it is necessary to carry out a ventilation study consisting of calculation notes and ventilation drawings/diagrams according to the following points :

  • Determination of pollutant characteristics and sources
  • Sizing of regulatory air flows
  • Choice of a ventilation concept (blowing, suction…)
  • Determination of ventilation components and equipment (fans, filters, ducts, control cabinets, lengths, …)
  • Comparative analysis of the diameter of the ventilation networks and calculation of the impact in terms of electrical power consumption.
  • Calculation of the necessary aeraulic performances (flow, pressure)
  • Numerical modeling of the ventilation network using our AERO software if necessary
  • Realization of ventilation plans and diagrams adapted to phasing
  • Determining the concept of regulatory control
  • Provision of calculation notes and detailed report
  • Determination of pollutant characteristics and sources
  • Sizing of regulatory air flows
  • Choice of a ventilation concept (blowing, suction…)
  • Determination of ventilation components and equipment (fans, filters, ducts, control cabinets, lengths, …)
  • Comparative analysis of the diameter of the ventilation networks and calculation of the impact in terms of electrical power consumption.
  • Calculation of the necessary aeraulic performances (flow, pressure)
  • Numerical modeling of the ventilation network using our AERO software if necessary
  • Realization of ventilation plans and diagrams adapted to phasing
  • Determining the concept of regulatory control
  • Provision of calculation notes and detailed report

Realization of measurement campaigns

Beyond the regulatory obligations and the recommendations of the prevention organizations, it is necessary to carry out periodic measurement campaigns made necessary by the evolution of the network and to detect anomalies if necessary.

  • Airflow measurements
  • Performance measurements of ventilation systems
  • Absolute pressure, temperature and relative humidity measurements
  • Climatic measurements (WBGT, …)
  • Measurements of harmful gas contents in the ambient air
  • Measurement of harmful gas contents in exhaust fumes from vehicles
  • Measurements of fine particulate matter PM10 and PM 2.5
  • Sampling and screening for broad spectrum identification of the pollutants present (bacteriological, chemical, …)
  • Measurements of inhalable and respirable dust exposures of personnel

At the end of this campaign, the operator will have a measurement report considered as the current image of its site.

In some cases, these measurement campaigns can be carried out automatically thanks to the installation of a parameter monitoring system. 

The monitoring system consists of the distribution on site of multiparametric measurement beacons which record in real time the contents of noxious gases, temperature and humidity, the rise of dust and fine particles, atmospheric pressure, as well as air speeds. This system called SENSOR’BOX fully meets regulatory expectations.

In some cases, these measurement campaigns can be carried out automatically thanks to the installation of a parameter monitoring system. 

The monitoring system consists of the distribution on site of multiparametric measurement beacons which record in real time the contents of noxious gases, temperature and humidity, the rise of dust and fine particles, atmospheric pressure, as well as air speeds. This system called SENSOR’BOX fully meets regulatory expectations.