Veolia EAU - Continuous monitoring of odor and target gas emissions at a WWTP, with the RQ Box solution case study

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Courtesy of Alpha MOS Environment

The site

  • Wastewater treatment plant Aquapôle, located in Isère, France
  • Operated by Société Dauphinoise d’Assainissement (SDA)
  • Capacity of 500 000 population equivalent
  • ISO 14001 approach

Challenges

  • To define a zero point for the odor footprint of the site in order to identify areas for improvement
  • To meet the air quality objective in the vicinity of the site (French law of 22 April 2008): 5 ouE.m-3 not
  • to be exceeded more than 175h/year (2% of the time) within a radius of 3 km around the plant
  • To reduce, or even eliminate the odor impact of the site, in particular near the highway
  • To communicate with local authorities and residents about the actions undertaken

Solution
A 6-month study, involving 3 complementary approaches:

  • Odor and physico-chemical measurement campaign, to rank odor sources and to educate the electronic nose for recognition and quantification of odor in ouE.m-3 (EN13725)
  • RQ Box solution for odor and gaseous pollutants monitoring, including:
    • a mobile RQ Box electronic nose, positioned in turn on each area of the site: sedimentation, grit
    • removal, decanting, thickening, etc. The detection system is adapted to a WWTP: odor, VOC, H2S,
    • mercaptans
    • a wireless communication system
    • RQ Net software for results acquisition and display
  • Odor impact assessment in the current configuration of the site (zero point): emission dispersionmodeling to determine the scope and frequence of odor nuisances and calculation of concentrations inthe vicinity.

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