{"id":25025,"date":"2026-09-15T16:31:44","date_gmt":"2026-09-15T20:31:44","guid":{"rendered":"https:\/\/sanexen.com\/?p=25025"},"modified":"2026-09-22T10:20:41","modified_gmt":"2026-09-22T14:20:41","slug":"pfas-une-technologie-concrete-pour-mieux-traiter-les-eaux-contaminees","status":"publish","type":"post","link":"https:\/\/sanexen.com\/fr\/2026\/09\/15\/pfas-une-technologie-concrete-pour-mieux-traiter-les-eaux-contaminees\/","title":{"rendered":"PFAS : une technologie concr\u00e8te pour mieux traiter les eaux contamin\u00e9es"},"content":{"rendered":"\n<p class=\"has-custom-css wp-custom-css-94e708c7 wp-block-paragraph\"><em>\u00c0 Rosemount, une unit\u00e9 de traitement \u00e0 grande \u00e9chelle a d\u00e9j\u00e0 pris en charge plus de 76 millions de litres de lixiviat.<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Traiter les PFAS gr\u00e2ce aux propri\u00e9t\u00e9s naturelles des bulles d\u2019air<\/strong> <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les <a href=\"https:\/\/sanexen.com\/fr\/solutions-pfas\/\">PFAS<\/a> forment une vaste famille de substances chimiques que l\u2019on peut retrouver dans diff\u00e9rents types d\u2019eaux contamin\u00e9es. Leur pr\u00e9sence dans les lixiviats \u2014 les eaux qui ont travers\u00e9 les d\u00e9chets d\u2019un site d\u2019enfouissement \u2014 repr\u00e9sente un d\u00e9fi particulier, en raison de leur composition complexe et de leurs charges \u00e9lev\u00e9es en contaminants de toutes sortes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour r\u00e9pondre \u00e0 cet enjeu, SANEXEN a d\u00e9velopp\u00e9 la technologie <a href=\"https:\/\/sanexen.com\/fr\/solutions-pfas\/\">ALTRA<\/a>, une solution de traitement fond\u00e9e sur le fractionnement par mousse. Apr\u00e8s plusieurs ann\u00e9es de recherche, d\u2019essais en laboratoire et de projets pilotes sur le terrain, cette technologie est aujourd\u2019hui exploit\u00e9e \u00e0 grande \u00e9chelle.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Comment fonctionne le fractionnement par mousse?<\/strong> <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le proc\u00e9d\u00e9 utilise une propri\u00e9t\u00e9 particuli\u00e8re des <a href=\"https:\/\/sanexen.com\/fr\/solutions-pfas\/\">PFAS<\/a> : ces mol\u00e9cules ont tendance \u00e0 s\u2019accumuler \u00e0 la surface de l\u2019eau et des bulles d\u2019air.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">De fines bulles sont inject\u00e9es au bas d\u2019une colonne d\u2019eau. En remontant, elles captent une partie des <a href=\"https:\/\/sanexen.com\/fr\/solutions-pfas\/\">PFAS<\/a> et les transportent vers la surface, o\u00f9 une mousse concentr\u00e9e se forme. Cette mousse est ensuite retir\u00e9e, ce qui permet de s\u00e9parer les contaminants d\u2019un volume d\u2019eau beaucoup plus important.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Il est important de pr\u00e9ciser que cette \u00e9tape ne d\u00e9truit pas les <a href=\"https:\/\/sanexen.com\/fr\/solutions-pfas\/\">PFAS<\/a>. Elle les concentre dans un faible volume de liquide, qui peut ensuite \u00eatre pris en charge au moyen d\u2019une m\u00e9thode adapt\u00e9e, notamment un traitement thermique, un proc\u00e9d\u00e9 d\u2019oxydation, une encapsulation ou une fili\u00e8re sp\u00e9cialis\u00e9e d\u2019\u00e9limination.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Plus de 76 millions de litres trait\u00e9s<\/strong> <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Une unit\u00e9 <a href=\"https:\/\/sanexen.com\/fr\/solutions-pfas\/\">ALTRA<\/a> est en activit\u00e9 depuis le d\u00e9but de 2024 sur le site d\u2019enfouissement de Rosemount, au Minnesota. Con\u00e7ue pour fonctionner en continu, elle poss\u00e8de une capacit\u00e9 d\u2019environ 273 000 litres par jour.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En pr\u00e8s de deux ans, plus de 76 millions de litres de lixiviat ont \u00e9t\u00e9 trait\u00e9s. Les donn\u00e9es recueillies montrent que le fractionnement par mousse est particuli\u00e8rement efficace pour retirer les <a href=\"https:\/\/sanexen.com\/fr\/solutions-pfas\/\">PFAS<\/a> \u00e0 cha\u00eene longue : les taux de retrait observ\u00e9s se situent g\u00e9n\u00e9ralement entre 85 % et 95 % et peuvent, dans certaines conditions, d\u00e9passer 99 %.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les <a href=\"https:\/\/sanexen.com\/fr\/solutions-pfas\/\">PFAS<\/a> \u00e0 cha\u00eene courte demeurent toutefois plus difficiles \u00e0 capter. Ils repr\u00e9sentent de 50 % \u00e0 80 % des <a href=\"https:\/\/sanexen.com\/fr\/solutions-pfas\/\">PFAS<\/a> d\u00e9tect\u00e9s dans certains lixiviats. Des travaux d\u2019optimisation sont donc en cours afin d\u2019am\u00e9liorer davantage leur traitement.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Une solution adapt\u00e9e \u00e0 chaque site <\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u2019exp\u00e9rience acquise confirme qu\u2019il n\u2019existe pas de solution universelle. La composition du lixiviat, son acidit\u00e9, son alcalinit\u00e9 et la nature des <a href=\"https:\/\/sanexen.com\/fr\/solutions-pfas\/\">PFAS<\/a> pr\u00e9sents peuvent influencer la formation de la mousse et la performance du proc\u00e9d\u00e9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u2019est pourquoi chaque projet commence par une caract\u00e9risation approfondie de l\u2019eau. Des essais en laboratoire permettent d\u2019\u00e9valuer la faisabilit\u00e9 du traitement, puis une unit\u00e9 pilote peut \u00eatre install\u00e9e sur le terrain. Cette \u00e9tape sert \u00e0 confirmer les performances dans les conditions r\u00e9elles du site et \u00e0 ajuster les param\u00e8tres avant le d\u00e9ploiement d\u2019une unit\u00e9 commerciale. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le laboratoire de recherche de SANEXEN r\u00e9alise environ 2 000 analyses de <a href=\"https:\/\/sanexen.com\/fr\/solutions-pfas\/\">PFAS<\/a> par ann\u00e9e afin de soutenir ces \u00e9tudes et d\u2019am\u00e9liorer continuellement les proc\u00e9d\u00e9s.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Une technologie con\u00e7ue pour les conditions r\u00e9elles <\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les unit\u00e9s <a href=\"https:\/\/sanexen.com\/fr\/solutions-pfas\/\">ALTRA<\/a> sont modulaires, automatis\u00e9es et con\u00e7ues pour un traitement continu. Leur configuration facilite l\u2019installation, l\u2019entretien et la surveillance des op\u00e9rations. Elles sont \u00e9galement isol\u00e9es et chauff\u00e9es afin de pouvoir fonctionner dans des conditions hivernales.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La r\u00e9duction des <a href=\"https:\/\/sanexen.com\/fr\/solutions-pfas\/\">PFAS<\/a> dans l\u2019eau constitue une premi\u00e8re \u00e9tape essentielle. En combinant la concentration par mousse \u00e0 des solutions compl\u00e9mentaires de traitement et de gestion des r\u00e9sidus, il devient possible de mettre en place une approche compl\u00e8te, adapt\u00e9e aux caract\u00e9ristiques de chaque site.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cette avanc\u00e9e illustre comment la recherche, les essais sur le terrain et l\u2019ing\u00e9nierie peuvent transformer un d\u00e9fi environnemental complexe en solution concr\u00e8te.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00c0 Rosemount, une unit\u00e9 de traitement \u00e0 grande \u00e9chelle a d\u00e9j\u00e0 pris en charge plus de 76 millions de litres de lixiviat. Traiter les PFAS gr\u00e2ce aux propri\u00e9t\u00e9s naturelles des bulles d\u2019air Les PFAS forment une vaste famille de substances chimiques que l\u2019on peut retrouver dans diff\u00e9rents types d\u2019eaux contamin\u00e9es. Leur pr\u00e9sence dans les lixiviats [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":25059,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[200,206],"tags":[],"class_list":["post-25025","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles","category-solution-pfas"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>PFAS : une technologie concr\u00e8te pour mieux traiter les eaux contamin\u00e9es | SANEXEN<\/title>\n<meta name=\"description\" content=\"D\u00e9couvrir l&#039;installation d&#039;ALTRA \u00e0 Rosemount : plus de 76 millions de litres de lixiviat trait\u00e9s pour \u00e9liminer les PFAS par fractionnement de mousse.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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