{"id":10007,"date":"2017-06-01T12:43:30","date_gmt":"2017-06-01T10:43:30","guid":{"rendered":"https:\/\/www.umweltperspektiven.ch\/?p=972"},"modified":"2022-02-09T11:10:55","modified_gmt":"2022-02-09T10:10:55","slug":"phosphor-rueckgewinnung-aus-klaerschlamm-realistisch","status":"publish","type":"post","link":"https:\/\/www.organisator.ch\/fr\/sustainability\/2017-06-01\/phosphor-rueckgewinnung-aus-klaerschlamm-realistisch\/","title":{"rendered":"R\u00e9cup\u00e9ration r\u00e9aliste du phosphore des boues d'\u00e9puration"},"content":{"rendered":"<div>\n<figure id=\"attachment_973\" aria-describedby=\"caption-attachment-973\" style=\"width: 602px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-973\" src=\"\/\/www.umweltperspektiven.ch\/wp-content\/uploads\/2017\/06\/kl\u00e4rschlamm.jpg\" alt=\"\" width=\"602\" height=\"715\" \/><figcaption id=\"caption-attachment-973\" class=\"wp-caption-text\">Boues d'\u00e9puration s\u00e9ch\u00e9es comme base pour la r\u00e9cup\u00e9ration du phosphore. (Photo : AWEL Zurich)<\/figcaption><\/figure>\n<\/div>\n<div><span style=\"font-family: Times New Roman,serif; font-size: medium;\"><span style=\"font-family: Arial Black,sans-serif; font-size: small;\">Le phosphore est une mati\u00e8re premi\u00e8re pr\u00e9cieuse et rare. Jusqu'\u00e0 pr\u00e9sent, il doit \u00eatre import\u00e9 d'autres continents, bien qu'il y en ait beaucoup dans nos eaux us\u00e9es. Un projet pilote men\u00e9 par le canton de Zurich montre d\u00e9sormais que cette mati\u00e8re premi\u00e8re peut \u00eatre r\u00e9cup\u00e9r\u00e9e \u00e0 grande \u00e9chelle \u00e0 partir des cendres issues du recyclage des boues d'\u00e9puration. <\/span><\/span><\/div>\n<div><\/div>\n<div>\n<p><span style=\"font-family: Times New Roman,serif; font-size: medium;\"><span style=\"font-family: Arial,sans-serif; font-size: small;\">Les d\u00e9chets sont des mati\u00e8res premi\u00e8res - telle est l'id\u00e9e directrice de la gestion des d\u00e9chets et des ressources du canton de Zurich. Pionnier dans ce que l'on appelle l'\"Urban Mining\", le canton de Zurich mise r\u00e9solument sur la r\u00e9cup\u00e9ration de mati\u00e8res valorisables \u00e0 partir de l'h\u00e9ritage de notre soci\u00e9t\u00e9. <\/span><\/span><\/p>\n<p><span style=\"font-family: Arial,sans-serif; font-size: small;\">L'une des mati\u00e8res premi\u00e8res les plus pr\u00e9cieuses qui se retrouve encore aujourd'hui dans les d\u00e9chets est le phosphore - une substance indispensable et irrempla\u00e7able pour les hommes, les animaux et les plantes. Depuis 2006, les boues d'\u00e9puration provenant des stations d'\u00e9puration des eaux us\u00e9es ne peuvent plus \u00eatre \u00e9pandues sur les champs comme engrais, car elles contiennent trop de substances nocives. De ce fait, le phosphore contenu dans les boues d'\u00e9puration ne retourne plus dans le cycle naturel des mati\u00e8res. Avec son nouveau plan d'\u00e9limination des boues d'\u00e9puration, le canton de Zurich s'est fix\u00e9 pour objectif d'am\u00e9nager les fili\u00e8res d'\u00e9limination des boues d'\u00e9puration de mani\u00e8re \u00e0 permettre une r\u00e9cup\u00e9ration ult\u00e9rieure du phosphore, dans l'optique d'une gestion durable des ressources. La r\u00e9alisation de l'installation centrale de valorisation des boues d'\u00e9puration \u00e0 Werdh\u00f6lzli \u00e0 Zurich a en outre permis de r\u00e9duire consid\u00e9rablement les co\u00fbts de traitement des boues d'\u00e9puration et d'optimiser l'utilisation \u00e9nerg\u00e9tique \u00e0 partir des boues d'\u00e9puration. En revanche, il manque encore actuellement des applications pratiques permettant de r\u00e9int\u00e9grer le phosphore des cendres de boues d'\u00e9puration dans le cycle des mati\u00e8res valorisables. <\/span><\/p>\n<p><span style=\"font-size: small;\"><strong> <span style=\"font-family: Arial Black,sans-serif;\">Apr\u00e8s le succ\u00e8s des essais en laboratoire, l'heure est maintenant aux essais pilotes<\/span> <\/strong><\/span><br \/>\n<span style=\"font-family: Arial,sans-serif; font-size: small;\">Pour que l'objectif fix\u00e9 pour le phosphore puisse \u00e9galement \u00eatre atteint, le canton de Zurich a largement contribu\u00e9 au d\u00e9veloppement d'un nouveau proc\u00e9d\u00e9 qui extrait le phosphore des cendres de boues d'\u00e9puration de mani\u00e8re \u00e9cologique et le rend r\u00e9utilisable. Gr\u00e2ce au nouveau proc\u00e9d\u00e9 d\u00e9velopp\u00e9, le phosphore peut \u00eatre r\u00e9introduit dans le cycle des mati\u00e8res valorisables sous forme d'acide phosphorique de haute qualit\u00e9. Outre la production d'engrais, les domaines d'application potentiels de l'acide phosphorique sont par exemple l'industrie alimentaire et fourrag\u00e8re ainsi que d'autres processus industriels. <\/span><\/p>\n<p><span style=\"font-family: Arial,sans-serif; font-size: small;\">Apr\u00e8s avoir r\u00e9ussi en octobre 2015 la premi\u00e8re production d'acide phosphorique de haute qualit\u00e9 \u00e0 partir de cendres de boues d'\u00e9puration zurichoises, les connaissances relatives \u00e0 l'exploitation en continu du proc\u00e9d\u00e9 dit Phos4life sont maintenant approfondies dans le cadre de l'exploitation pilote en cours. L'objectif est de rendre commercialisable la production industrielle d'acide phosphorique pur, exempt de m\u00e9taux lourds, \u00e0 partir de cendres de boues d'\u00e9puration. <\/span><\/p>\n<p><span style=\"font-size: small;\"><strong> <span style=\"font-family: Arial Black,sans-serif;\">Beaucoup plus respectueux de l'environnement<\/span> <\/strong><\/span><br \/>\n<span style=\"font-family: Arial,sans-serif; font-size: small;\">Compar\u00e9 aux acides phosphoriques fabriqu\u00e9s de mani\u00e8re conventionnelle \u00e0 partir de phosphate brut et utilis\u00e9s aujourd'hui, l'impact environnemental de l'acide Phos4life issu des cendres de boues d'\u00e9puration indig\u00e8nes est nettement plus faible. En revanche, il appara\u00eet d'ores et d\u00e9j\u00e0 qu'une mise en \u0153uvre \u00e9conomiquement viable ne sera possible que si les cendres sont trait\u00e9es ensemble par plusieurs installations de valorisation des boues d'\u00e9puration. De plus, il faut trouver une solution pour savoir comment et par qui les co\u00fbts non couverts par le march\u00e9 seront pris en charge.<\/span><\/p>\n<\/div>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Phosphor ist ein kostbarer und knapper Rohstoff. Bisher muss er aus anderen Kontinenten importiert werden, obwohl es viel davon in unserem Abwasser hat. Ein Pilotprojekt unter Federf\u00fchrung des Kantons Z\u00fcrich zeigt nun, dass sich der Rohstoff im grossen Stil aus der Asche der Kl\u00e4rschlammverwertung zur\u00fcckgewinnen l\u00e4sst. Abf\u00e4lle sind Rohstoffe \u2013 so die Leitidee der Abfall- [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":9492,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_yoast_wpseo_focuskw":"Phosphor","_yoast_wpseo_metadesc":"Ein Pilotprojekt des Kantons Z\u00fcrich zeigt, dass sich der Rohstoff Phosphor im grossen Stil aus Kl\u00e4rschlamm-Asche r\u00fcckgewinnen l\u00e4sst.","articlekey":"","footnotes":""},"categories":[580],"tags":[1474,1499,1907,2416],"class_list":["post-10007","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sustainability","tag-kanton-zuerich","tag-klaerschlamm","tag-phosphor","tag-urban-mining"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Phosphor-R\u00fcckgewinnung aus Kl\u00e4rschlamm realistisch - Organisator<\/title>\n<meta name=\"description\" content=\"Ein Pilotprojekt des Kantons Z\u00fcrich zeigt, dass sich der Rohstoff Phosphor im grossen Stil aus Kl\u00e4rschlamm-Asche r\u00fcckgewinnen l\u00e4sst.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.organisator.ch\/fr\/sustainability\/2017-06-01\/phosphor-rueckgewinnung-aus-klaerschlamm-realistisch\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Phosphor-R\u00fcckgewinnung aus Kl\u00e4rschlamm realistisch - 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