{"id":3657,"date":"2025-08-25T10:04:18","date_gmt":"2025-08-25T08:04:18","guid":{"rendered":"https:\/\/axilab.fr\/realisations\/reducing-noise-emissions-from-a-classified-icpe-site-example-of-a-veolia-site\/"},"modified":"2026-05-28T09:45:44","modified_gmt":"2026-05-28T07:45:44","slug":"reducing-noise-emissions-from-a-classified-icpe-site-example-of-a-veolia-site","status":"publish","type":"realisations","link":"https:\/\/axilab.fr\/en\/achievements\/reducing-noise-emissions-from-a-classified-icpe-site-example-of-a-veolia-site\/","title":{"rendered":"Reducing noise emissions from a classified ICPE site: example of a VEOLIA site"},"content":{"rendered":"\n

As part of the environmental management of a VEOLIA<\/strong> site classified as an ICPE<\/strong> in the Finist\u00e8re region of France, a noise problem linked to two atmospheric emission stacks required the installation of a high-performance acoustic system. Here’s a look back at a successful intervention, in line with regulatory requirements and industry best practice. <\/p>\n\n

\"Exhaust<\/figure>\n\n

Regulatory context and site issues<\/h2>\n\n

VEOLIA’s industrial site is classified as an Installation Class\u00e9e pour la Protection de l’Environnement (ICPE)<\/strong>. As such, it is subject to strict regulations concerning noise pollution, particularly in the Zones \u00e0 \u00c9mergence R\u00e9glement\u00e9e (ZER)<\/strong> located close to residential areas. <\/p>\n\n

An acoustic measurement<\/a> campaign revealed that noise emissions from the two atmospheric discharge stacks were the main sources of noise perceived by local residents, particularly at night. <\/p>\n\n

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The levels measured exceeded the regulatory thresholds<\/strong> defined by thedecree of January 23, 1997<\/strong><\/a>. Corrective action was therefore essential to comply with legal requirements and limit the impact on the neighborhood.<\/strong> <\/p>\n<\/div>\n\n\n\n

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\"Acoustic<\/figure>\n<\/div>\n<\/div>\n\n

Customized diagnostics and technical approach<\/h2>\n\n

Identification of emission spectra<\/strong> <\/h3>\n\n

A new campaign of in situ acoustic measurements enabled us to characterize the emission spectra specific to each stack. This step enabled us to target the frequency bands that contribute most to ambient noise, and served as the basis for sizing acoustic silencers<\/a><\/strong>. <\/p>\n\n

Sizing insertion silencers<\/strong><\/h3>\n\n

Based on these results, AXILAB<\/a> designed insertion silencers to meet the technical constraints of the site: high effluent temperature, permissible pressure drop and mechanical integration into the industrial environment. <\/p>\n\n

The main objective was to achieve targeted spectral attenuation, while guaranteeing the durability of the equipment and the absence of impact on the industrial process. <\/strong><\/p>\n\n

AXILAB was able to count on the CL2R<\/a> teams to carry out all the integration work on the incinerator exhaust lines:<\/p>\n\n