{"id":4382,"date":"2018-06-07T13:01:14","date_gmt":"2018-06-07T11:01:14","guid":{"rendered":"http:\/\/agora.xtec.cat\/ceiprellinars\/?p=4382"},"modified":"2026-02-03T19:15:56","modified_gmt":"2026-02-03T18:15:56","slug":"ens-visita-el-bernat-tiet-de-lada-i-la-lila-que-treballa-en-una-potabilitzadora","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/ceiprellinars\/actualitat\/ens-visita-el-bernat-tiet-de-lada-i-la-lila-que-treballa-en-una-potabilitzadora\/","title":{"rendered":"ENS VISITA EL BERNAT, TIET DE L’ADA I LA LILA, QUE TREBALLA EN UNA POTABILITZADORA"},"content":{"rendered":"

Aquest mat\u00ed ens ha visitat a la classe el Bernat, el tiet de l’Ada i la Lila que treballa en una potabilitzadora. Com que sap que estem treballant l’aigua i el cicle urb\u00e0, vam pensar que seria una bona idea que vingu\u00e9s a l’escola a explicar-nos de qu\u00e8 treballa i com es fa la seva feina,<\/p>\n

La potabilitzadora de Sant Joan Desp\u00ed, subministra aigua potable a 3.000.000 de persones. Aquesta potabilitzadora aporta un 60 o 70% de l\u2019aigua que es consumeix a Barcelona.<\/p>\n

Altres potabilitzadores importants s\u00f3n la d\u2019Abrera i Cardedeu.<\/p>\n

En casos molt excepcionals, quan hi ha sequera i no baixa aigua del riu Llobregat, han arribat a portar vaixells d\u2019aigua potable des d\u2019It\u00e0lia.<\/p>\n

En altres moments, tamb\u00e9 es va crear una dessalinitzadora d\u2019aigua, que treu la sal de l\u2019aigua del mar, per\u00f2 el proc\u00e9s \u00e9s molt car.<\/p>\n

Amb l\u2019ajuda d\u2019un mapa, ens ha anat explicant el circuit urb\u00e0 de l\u2019aigua que ja hav\u00edem dibuixat nosaltres, per\u00f2 que avui el veiem amb un p\u00f2ster i que ens ajuda molt m\u00e9s a entendre com funciona aquest cicle.<\/p>\n

\"\"<\/a><\/p>\n

En la potabilitzadora:<\/p>\n

1.- Separar la terra\/sorra. Amb una pala treuen la sorra, despr\u00e9s d\u2019estar amb rep\u00f2s. Aquesta sorra va a un abocador controlat.<\/p>\n

2.- Desinfectant per controlar malalties. Hi afegeixen di\u00f2xid de clor per matar bacteris, virus, protozous\u2026.<\/p>\n

A les piscines tamb\u00e9 hi afegeixen clor per\u00f2 en m\u00e9s quantitat, per tant, l\u2019aigua de les piscines no es pot considerar aigua potable.<\/p>\n

3.- Decantadors: en aquest proc\u00e9s el que fan \u00e9s clarificar l\u2019aigua, posar-hi coagulants per treure la terbolesa de l\u2019aigua. Fem un experiment, per\u00f2 no ens acaba de funcionar, perqu\u00e8 l\u2019hem agitat massa. Te\u00f2ricament el que fa el coagulant \u00e9s ajuntar les part\u00edcules petites perqu\u00e8 siguin m\u00e9s grans i caiguin per la gravetat (pes)<\/p>\n

\"\"<\/a><\/p>\n

4.- Filtraci\u00f3 sorra: aigua molt transparent, per\u00f2 encara no \u00e9s potable.<\/p>\n

5.- A partir d\u2019aqu\u00ed l\u2019aigua es separa en dos camins: un amb filtraci\u00f3 per carb\u00f3 (oz\u00f3), que desinfecta i oxida la contaminaci\u00f3, que llavors queda \u201cenganxada\u201d al carb\u00f3.<\/p>\n

Una altra part de l\u2019aigua se li treu la sal, i per tant, s\u2019afegeix calcita perqu\u00e8 sin\u00f3 seria massa pura i tampoc seria apte per beure.<\/p>\n

6.- Per \u00faltim, s\u2019afegeix clor per assegurar que la possible contaminaci\u00f3 que pugui trobar-se pel cam\u00ed no afecti ni contamini l\u2019aigua potable.<\/p>\n

 <\/p>\n

A vegades, ens explica el Bernat, que si l\u2019aigua del riu baixa molt contaminada o en baixa poca, tamb\u00e9 poden agafar l\u2019aigua dels aq\u00fc\u00edfers, que s\u00f3n aigua subterr\u00e0nies que s\u2019han filtrat i al trobar-se amb una capa impermeable (roca) queden estancades. Aquesta aigua dels aq\u00fc\u00edfers \u00e9s for\u00e7a neta ja, i per tant, nom\u00e9s s\u2019aplica el final del proc\u00e9s de la potabilitzadora.<\/p>\n

Per comprovar que l\u2019aigua de l\u2019aixeta cont\u00e9 clor, hi posem un reactiu. Si aquest producte tenyeix l\u2019aigua (rosa) vol dir que cont\u00e9 clor, sin\u00f3 no. Observem que l\u2019aigua de l\u2019aixeta si que en cont\u00e9 per\u00f2 en canvi, l\u2019aigua del riu no. L\u2019aigua embotellada tampoc en t\u00e9.<\/p>\n

\"\"<\/a><\/p>\n

Li hem pogut fer un munt de preguntes, tamb\u00e9 ens ha explicat que ell va donar l\u2019av\u00eds la setmana passada pel trencament del dip\u00f2sit de salmorra que hi va haver.<\/p>\n

Molt\u00edssimes gr\u00e0cies Bernat per venir a l\u2019escola i explicar-nos tantes coses interessant sobre la potabilitzadora.<\/p>\n

\"\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Aquest mat\u00ed ens ha visitat a la classe el Bernat, el tiet de l’Ada i la Lila que treballa en una potabilitzadora. Com que sap que estem treballant l’aigua i el cicle urb\u00e0, vam pensar que seria una bona idea que vingu\u00e9s a l’escola a explicar-nos de qu\u00e8 treballa i com es fa la seva […]<\/p>\n","protected":false},"author":1,"featured_media":4387,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1,27,427],"tags":[233,42,234],"class_list":["post-4382","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualitat","category-escola","category-mitjans-grans","tag-cicle-aigua","tag-escola-rellinars","tag-potabilitzadora"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/posts\/4382","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/comments?post=4382"}],"version-history":[{"count":2,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/posts\/4382\/revisions"}],"predecessor-version":[{"id":4389,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/posts\/4382\/revisions\/4389"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/media\/4387"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/media?parent=4382"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/categories?post=4382"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/tags?post=4382"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}