{"id":107,"date":"2012-01-26T15:45:24","date_gmt":"2012-01-26T14:45:24","guid":{"rendered":"http:\/\/www.granulex.fr\/?page_id=107"},"modified":"2012-05-31T16:43:14","modified_gmt":"2012-05-31T14:43:14","slug":"biofiltres","status":"publish","type":"page","link":"https:\/\/www.granulex.fr\/?page_id=107","title":{"rendered":"Biofiltres"},"content":{"rendered":"
\n

Granulats pour biofiltres<\/h2>\n

\t\u2022<\/span> De part ses fortes performances m\u00e9caniques, sa grande l\u00e9g\u00e8ret\u00e9 et sa densit\u00e9 contr\u00f4l\u00e9e, Granulex\u00ae<\/span> est fr\u00e9quemment utilis\u00e9 pour la r\u00e9alisation de Biofiltres<\/p>\n

\t\u2022<\/span> Les courbes granulom\u00e9triques sont sp\u00e9cifiquement retravaill\u00e9es afin d\u2019obtenir un minimum de fines et un coefficient d\u2019uniformit\u00e9 adapt\u00e9 aux probl\u00e9matiques de la filtration par biofiltres.<\/p>\n

\t\u2022<\/span> L\u2019utilisation des ardoises ou schistes expans\u00e9s dans le monde de la filtration est mondialement connue. En effet, les besoins des stations d\u2019\u00e9puration de grande envergure n\u00e9cessitent un gravillon suffisamment l\u00e9ger pour permettre une d\u00e9colmatation ais\u00e9e, mais une r\u00e9sistance \u00e0 l\u2019attrition \u00e9lev\u00e9e.<\/p>\n

\t\u2022<\/span> Outre sa totale neutralit\u00e9 chimique, Granulex\u00ae<\/span> offre ces deux qualit\u00e9s indispensables.<\/p>\n

\t\u2022<\/span> Granulex\u00ae<\/span> a fait l\u2019objet d\u2019\u00e9tudes sp\u00e9cifiques \u00e0 la biofiltration (Ecole Nationale Sup\u00e9rieure de Chimie de Rennes). Ces tests d\u00e9montrent que l\u2019aspect m\u00e9canique du Granulex\u00ae<\/span> n\u2019est pas sa seule qualit\u00e9. En effet, la surface sp\u00e9cifique du Granulex\u00ae<\/span> ainsi que sa microporosit\u00e9 sont nettement sup\u00e9rieures aux pouzzolanes et permettent une colonisation bact\u00e9rienne rapide et durable.<\/p>\n

\t\u2022<\/span> Les granulats pour m\u00e9dia filtrant GranuFiltre sont livrables conditionn\u00e9s en big bag de 1,5 m3<\/sup>, en camion benne vrac (40\/42 m3<\/sup>) et en camion citerne \u00e0 vidange pneumatique (25 m3<\/sup>). La livraison par camion citerne \u00e0 vidange pneumatique permet une mise en place rapide du m\u00e9dia filtrant mais d\u00e9t\u00e9riore les crit\u00e8res d\u2019hydraulicit\u00e9.
\n\tLe CU augmente de 0,15 et le D10<\/sub> diminue de 3 \u00e0 7 % selon la longueur et le parcours des tuyaux de vidange qui d\u00e9terminent la pression d\u2019air de transport habituellement comprise entre 0,7 et 2 bars.<\/p>\n

Ce granulat ne contient pas de substances class\u00e9es dans SVHC.<\/p>\n<\/p><\/div>\n

\n\"structure<\/p>\n

Structure microporeuse<\/p>\n

\"cellule<\/p>\n

Cellule de filtration<\/p>\n<\/div>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Fuseau granulom\u00e9trique<\/strong><\/td>\n0 – 4<\/td>\n1 – 4<\/td>\n2 – 4<\/td>\n2,5 – 5<\/td>\n3 – 6<\/td>\n4 – 7<\/td>\n<\/tr>\n
Taille effective<\/strong><\/td>\n1.10 mm<\/td>\n1.4 mm<\/td>\n2 mm<\/td>\n2,70 mm<\/td>\n3,30 mm<\/td>\n4,10 mm<\/td>\n<\/tr>\n
Taille moyenne<\/strong><\/td>\n2,50 mm<\/td>\n2,8 mm<\/td>\n3,00 mm<\/td>\n3,75 mm<\/td>\n4,50 mm<\/td>\n5,50 mm<\/td>\n<\/tr>\n
Coefficient d\u2019uniformit\u00e9<\/strong><\/td>\n< 5<\/td>\n< 3<\/td>\n< 2<\/td>\n< 5<\/td>\n< 5<\/td>\n< 5<\/td>\n<\/tr>\n
Coefficient d\u2019uniformit\u00e9<\/strong><\/td>\n< 5<\/td>\n< 3<\/td>\n< 2<\/td>\n< 1,5<\/td>\n< 1,5<\/td>\n< 1,5<\/td>\n<\/tr>\n
Poussi\u00e8res<\/strong><\/td>\nMax 1 %<\/td>\nMax 1 %<\/td>\nMax 1 %<\/td>\nMax 1 %<\/td>\nMax 1 %<\/td>\nMax 1 %<\/td>\n<\/tr>\n
Inf\u00e9rieurs \u00e0 0,25 mm<\/strong><\/td>\nMax 3 %<\/td>\nMax 5 %<\/td>\nMax 10 %<\/td>\nMax 3 %<\/td>\nMax 3 %<\/td>\nMax 3 %<\/td>\n<\/tr>\n
Sup\u00e9rieurs \u00e0 4 mm<\/strong><\/td>\nMax 10 %<\/td>\nMax 10 %<\/td>\nMax 10 %<\/td>\nMax 7 %<\/td>\nMax 10 %<\/td>\nMax 10 %<\/td>\n<\/tr>\n
Densit\u00e9 apparente sur sec (kg \/ m3)<\/strong><\/td>\n930<\/td>\n950 <\/td>\n910 <\/td>\n875 <\/td>\n850 <\/td>\n830 <\/td>\n<\/tr>\n
Densit\u00e9 r\u00e9elle sur sec (kg \/ m3)<\/strong><\/td>\n1.810<\/td>\n1700<\/td>\n1700<\/td>\n1.600<\/td>\n1.580<\/td>\n1.550<\/td>\n<\/tr>\n
Absorption d\u2019eau \u00e0 24 h<\/strong><\/td>\n10%<\/td>\n9%<\/td>\n9%<\/td>\n5%<\/td>\n6%<\/td>\n6%<\/td>\n<\/tr>\n
Flottants \u00e0 1<\/strong><\/td>\n< 1 %<\/td>\n< 1 %<\/td>\n< 1 %<\/td>\n< 1 %<\/td>\n< 1 %<\/td>\n< 1 %<\/td>\n<\/tr>\n
Solubilit\u00e9 \u00e0 pH 1<\/strong><\/td>\n0.15 %<\/td>\n<\/tr>\n
Solubilit\u00e9 \u00e0 pH 7<\/strong><\/td>\n0.08 %<\/td>\n<\/tr>\n
Solubilit\u00e9 \u00e0 pH 13<\/strong><\/td>\n0.07 %<\/td>\n<\/tr>\n
R\u00e9sistance m\u00e9canique<\/strong><\/td>\n18 Mpa<\/td>\n18 Mpa<\/td>\n16 Mpa<\/td>\n16 Mpa<\/td>\n16 Mpa<\/td>\n15 Mpa<\/td>\n<\/tr>\n
Porosit\u00e9 inter granulaire<\/strong><\/td>\n41%<\/td>\n44%<\/td>\n43%<\/td>\n46%<\/td>\n46%<\/td>\n47%<\/td>\n<\/tr>\n
Percolation non tass\u00e9<\/strong><\/td>\n12\u2019\u2019<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Granulats pour biofiltres \u2022 De part ses fortes performances m\u00e9caniques, sa grande l\u00e9g\u00e8ret\u00e9 et sa densit\u00e9 contr\u00f4l\u00e9e, Granulex\u00ae est fr\u00e9quemment utilis\u00e9 pour la r\u00e9alisation de Biofiltres \u2022 Les courbes granulom\u00e9triques sont sp\u00e9cifiquement retravaill\u00e9es afin d\u2019obtenir un minimum de fines et … Continuer la lecture →<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"parent":327,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"page-eau.php","meta":{"footnotes":""},"class_list":["post-107","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.granulex.fr\/index.php?rest_route=\/wp\/v2\/pages\/107","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.granulex.fr\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.granulex.fr\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.granulex.fr\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.granulex.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=107"}],"version-history":[{"count":32,"href":"https:\/\/www.granulex.fr\/index.php?rest_route=\/wp\/v2\/pages\/107\/revisions"}],"predecessor-version":[{"id":876,"href":"https:\/\/www.granulex.fr\/index.php?rest_route=\/wp\/v2\/pages\/107\/revisions\/876"}],"up":[{"embeddable":true,"href":"https:\/\/www.granulex.fr\/index.php?rest_route=\/wp\/v2\/pages\/327"}],"wp:attachment":[{"href":"https:\/\/www.granulex.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=107"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}