{"id":4295,"date":"2017-03-21T20:03:12","date_gmt":"2017-03-21T19:03:12","guid":{"rendered":"http:\/\/agora.xtec.cat\/ies-merce-rodoreda\/?p=4295"},"modified":"2017-05-22T14:08:42","modified_gmt":"2017-05-22T12:08:42","slug":"excursio-a-la-depuradora-de-el-prat","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/portada\/excursio-a-la-depuradora-de-el-prat\/","title":{"rendered":"Excursi\u00f3 a la depuradora de El Prat"},"content":{"rendered":"

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

Avui, alguns membres del cicle formatiu hem fet un visita volunt\u00e0ria a la planta EDAR del Prat de Llobregat, la planta que depura les aig\u00fces de l’Hospitalet<\/strong>, Sant Just, El Prat, Cornell\u00e0 i un 35% de Barcelona entre altres … l’excursi\u00f3 consistia en una visita guiada per les diferents parts de la planta; A la fotografia inicial podeu veure el esquema de la planta al igual que el recorregut que vam seguir.<\/p>\n

Les EDAR s\u00f3n plantes on es depura l’aigua per poder retornar-la a la natura o donar-li un \u00fas de nou. L’aigua contaminada que es tracta pot provenir de diverses activitats contaminants: urbana, industrial, agricultura … En el cas de la planta del Prat s\u00f3n aig\u00fces dom\u00e8stiques i de pluja.<\/p>\n

Les EDAR poden variar la seva estructura i processos, segons treballin una aigua o una altre o tamb\u00e9 depenent del \u00fas que se’n vulgui donar despr\u00e9s a aquesta aigua.<\/p>\n

L’EDAR que vam visitar presentava la seg\u00fcent estructura:<\/p>\n

    \n
  1. Pretractament<\/strong>\n
      \n
    1. Pou de grollera\u00a0<\/em>\u2192<\/strong>\u00a0Regula el cabal i la velocitat, a m\u00e9s al fer aix\u00f2 ens permet dipositar s\u00f2lids voluminosos i pesants al fons<\/li>\n
    2. Predesbast\u00a0<\/em>\u2192<\/strong>\u00a0<\/em>Sistema de reixes (10 cm d\u2019espai) ret\u00e9 papers, pl\u00e0stics, s\u00f2lids gruixuts…<\/li>\n
    3. Bombes d’elevaci\u00f3 de l’aigua\u00a0<\/em>\u2192<\/strong>\u00a0<\/em>Serveixen per elevar l’aigua, despr\u00e8s ja funciona mitjan\u00e7ant la for\u00e7a de gravetat.<\/li>\n
    4. Desbast\u00a0<\/em>\u2192<\/strong>\u00a0<\/em>El sistema de reixes, que te una separaci\u00f3 de 3cm, es retenen les part\u00edcules s\u00f2lides\/sedimentables.<\/li>\n
    5. Dessorrador\/desgreixador\u00a0<\/em>\u2192<\/strong> Sedimentador per a col\u00b7lo\u00efdals i greixos.<\/li>\n
    6. Decantador primari\u00a0<\/em>\u2192<\/strong>\u00a0<\/em>Aqu\u00ed per decantaci\u00f3 sedimenten s\u00f2lids en suspensi\u00f3, els quals hav\u00edem separat previament durant el pretractament (sorres …).<\/li>\n<\/ol>\n<\/li>\n
    7. Tractament primari\u00a0\u2192<\/strong> Al ser una planta EDAR biol\u00f2gica no presenta un tractament primari, quedaria incl\u00f2s entre la decantaci\u00f3 prim\u00e0ria i el tractament secundari.<\/li>\n
    8. Tractament secundari<\/strong>\n
        \n
      1. Reactor biol\u00f2gic\u00a0<\/em>\u2192<\/strong>\u00a0<\/em>Aqu\u00ed \u00e9s on es retira la mat\u00e8ria org\u00e0nica dissolta. Es fa passar l’aigua per diversos tancs amb pres\u00e8ncia\u00a0 de microorganismes que oxiden i degraden la mat\u00e8ria org\u00e0nica fins a assimilar-la.\u00a0<\/em><\/li>\n
      2. Decantador secundari<\/em>\u00a0\u2192<\/strong>\u00a0Es separen els bacteris que han sedimentat com a\u00a0 fang.\u00a0\u00a0<\/em><\/li>\n<\/ol>\n<\/li>\n
      3. Tractament terciari\u00a0\u2192\u00a0<\/strong>\u00c9s un proc\u00e9s d’afinament del aigua, aqu\u00ed es sotmet l’aigua a uns processos de depuraci\u00f3 que permeten que s’utilitzi en agricultura i altres usos.<\/li>\n<\/ol>\n

        D’aqu\u00ed l’aigua passaria per una canonada submarina d’uns 3 km de llarga que dispersa l’agua tractada al mar.<\/p>\n

        Ara voldria passar a un tema que pot semblar m\u00e9s subjectiu encara que s\u00f3n fets plens d`objectivitat. \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Al estar estudiant aquests temes en el cicle, l’activitat es va desenvolupar en l’aspecte t\u00e8cnic del sistema de depuraci\u00f3, per\u00f2 amb la resta de visites sol agafar un car\u00e0cter m\u00e9s de conscienciar de l’import\u00e0ncia d’aquest servei, i d’aix\u00f2 volia parlar ara. \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Moltes vegades oblidem les conseq\u00fc\u00e8ncies de les nostres activitats, pensant que no repercuteixen, sobretot les activitats m\u00e9s essencials i necess\u00e0ries, que com no les podem deixar de fer pensem que no poden tenir repercussions (dutxar-se, rentar-se mans i dents, lavabo …) per\u00f2 les tenen.<\/p>\n

         <\/p>\n

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

        L’aigua \u00e9s un recurs i tendim a malbaratar-la, sense pensar en les conseq\u00fc\u00e8ncies que t\u00e9; normalment al parlar de la problem\u00e0tica de l’aigua parlem de el abusiu consum, sobretot en els pa\u00efsos desenvolupades.<\/p>\n

        “En \u00e9l se estima que la media de uso de agua en el mundo asciende a 499m3\/hab\/a\u00f1o ; es decir, unos 499.000 litros por persona.<\/a>“<\/em><\/p>\n

        Per\u00f2 aqu\u00ed parlar\u00e9 d’una altre pr\u00e0ctica perjudicial antropol\u00f2gica sobre l’aigua no tan coneguda, que \u00e9s la contaminaci\u00f3 d’aquesta.<\/p>\n

        Tendim a pensar que al barrejar els contaminants en aigua aquests es dilueixen i ja no repercuteixen, m\u00e9s encara, si despr\u00e9s aquesta aigua la llencem al mar i es dissolen (com es dissolen els contaminants perqu\u00e8 no els problemes? No?) ; aix\u00f2 \u00e9s un gran problema causat per la desinformaci\u00f3 i el despreocupaci\u00f3 de la poblaci\u00f3, que a vegades per no sentir-se malament prefereix evitar la realitat. \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Cada dia milers de litres d’aigua han de ser tractats a aquest planta per poder retornar l’aigua a la natura, i tot i fer-la passar per t\u00e8cniques i processos espec\u00edfics i amb la millor tecnologia actual no es pot considerar ni de bon tros que l’aigua esta tan neta com quan la vam extreure del seu curs natural, de manera que poc a poc anem contaminant el mar; a sobre aix\u00f2 es dona arreu del m\u00f3n, cosa que ens fa pensar el seg\u00fcent, que sort tenim que encara aqu\u00ed es porta a terme un proc\u00e9s de depuraci\u00f3 com a conseq\u00fc\u00e8ncia d’una consciencia ambiental, pero a les zones menys desenvolupades i explotades per els pa\u00efsos rics, qui assegura que els vessaments de les f\u00e0briques (i altes fonts) no acabi en el mar sense tractament previ.<\/p>\n

        Com a conclusi\u00f3 m’agradaria fer una petici\u00f3 als lectors: l’aigua \u00e9s un recurs que hem de protegir, i una de \u00a0les maneres es evitar contaminar la que tenim, si alhora de portar a terme les nostres activitats i h\u00e0bits de cada dia pogu\u00e9rem, encara que fos una mica, pensar en no fer un mal \u00fas de l’aigua. A la planta vam poder veure com una gran pres\u00e8ncia de voluminosos i “tovalloletes” a l’aigua implicaven una gran problem\u00e0tica i retr\u00e0s en el tractament d’aquesta apart d’una inversi\u00f3 e diners que es perd exorbitant.<\/p>\n

        Cuidem el nostre planeta.<\/p>\n

        \"2017-04-30-PHOTO-00000057\"<\/a><\/p>\n

         <\/p>\n

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

        Avui, alguns membres del cicle formatiu hem fet un visita volunt\u00e0ria a la planta EDAR del Prat de Llobregat, la […]<\/p>\n","protected":false},"author":148,"featured_media":4298,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"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":[30,173,29,269],"tags":[350,348,349],"class_list":["post-4295","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mediambient","category-modul-a","category-portada","category-sortides-culturals","tag-aiguesnetes","tag-edar","tag-elpratforever"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-json\/wp\/v2\/posts\/4295","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-json\/wp\/v2\/users\/148"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-json\/wp\/v2\/comments?post=4295"}],"version-history":[{"count":3,"href":"https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-json\/wp\/v2\/posts\/4295\/revisions"}],"predecessor-version":[{"id":4603,"href":"https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-json\/wp\/v2\/posts\/4295\/revisions\/4603"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-json\/wp\/v2\/media\/4298"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-json\/wp\/v2\/media?parent=4295"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-json\/wp\/v2\/categories?post=4295"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-json\/wp\/v2\/tags?post=4295"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}