{"id":7939,"date":"2016-02-05T15:45:32","date_gmt":"2016-02-05T15:45:32","guid":{"rendered":"https:\/\/www.bioecoactual.com\/2016\/02\/05\/la-mala-gestio-dels-purins-contamina-aire-terres-i-aiguees\/"},"modified":"2018-02-02T12:19:48","modified_gmt":"2018-02-02T10:19:48","slug":"la-mala-gestio-dels-purins-contamina-aire-terres-i-aiguees","status":"publish","type":"post","link":"https:\/\/www.bioecoactual.com\/ca\/2016\/02\/05\/la-mala-gestio-dels-purins-contamina-aire-terres-i-aiguees\/","title":{"rendered":"La mala gesti\u00f3 dels purins contamina aire, terres i aig\u00fces"},"content":{"rendered":"<p>La carn vermella de major consum mundial \u00e9s la carn de porc i la seva demanda en les \u00faltimes d\u00e8cades ha experimentat un fort increment, segons les dades de la FAO, l&#8217;Organitzaci\u00f3 de Nacions Unides per a l&#8217;Alimentaci\u00f3 i l&#8217;Agricultura. El sector porc\u00ed ha assolit la xifra dels mil milions en 2015, el doble que en la d\u00e8cada de 1970.<\/p>\n<\/p>\n<p>  <!--more-->  <\/p>\n<p>Espanya \u00e9s el quart productor porc\u00ed del m\u00f3n (gaireb\u00e9 30 milions de caps segons les enquestes ramaderes de 2015 difoses pel MAGRAMA, Ministeri d&#8217;Agricultura, Alimentaci\u00f3 i Medi Ambient) per darrere de la Xina, els EUA i Alemanya.<\/p>\n<p>Hi ha m\u00e9s de 2000 explotacions ramaderes a tot Espanya i Catalunya lidera el sector porc\u00ed sent la comunitat m\u00e9s productora en porc\u00ed blanc, amb gaireb\u00e9 7milions i mig d&#8217;animals, seguida d&#8217;Arag\u00f3 (gaireb\u00e9 6 milions i mig), Castella i Lle\u00f3 (una mica m\u00e9s de 3 milions i mig de porcs) i Andalusia (poc m\u00e9s de 2 milions).<\/p>\n<p><strong>El risc de l&#8217;exc\u00e9s de purins<\/strong><\/p>\n<p>Les grans explotacions intensives amb milers de porcs han substitu\u00eft als petits ramaders i el benefici que antigament suposava el fem dels porcs per augmentar la fertilitat del terreny ha passat des de ja fa anys a convertir-se en un dels majors problemes ambientals i de salut p\u00fablica.<\/p>\n<p>Aquestes granges intensives fan servir sistemes de neteja que utilitzen l&#8217;aigua a pressi\u00f3 per l&#8217;arrossegament de les deposicions s\u00f2lides i l\u00edquides dels porcs, de manera que es produeix un fem liquat resultant de la barreja d&#8217;aigua, orins, excrements i restes de pinsos que es denomina &#8220;pur\u00ed&#8221;. Els purins continuen conservant el seu valor com a adob mineral, per\u00f2 la dificultat per al seu maneig i transport a causa del seu alt contingut en aigua (95%) i l&#8217;alta concentraci\u00f3 d&#8217;explotacions ramaderes en regions sense suficient terreny proper per aprofitar la quantitat de purins com adob mineral, provoca un excedent que comporta, no nom\u00e9s males olors sin\u00f3 tamb\u00e9 <strong>emissi\u00f3 de gasos d&#8217;efecte hivernacle, amon\u00edac, met\u00e0, contaminaci\u00f3 de s\u00f2ls per exc\u00e9s de nutrients (nitrogen, f\u00f2sfor i potassi) i contaminaci\u00f3 d&#8217;aig\u00fces superficials i subterr\u00e0nies per els seus nitrats<\/strong>.<\/p>\n<p>L&#8217;OMS ja va advertir del perill de consumir aigua que contingui m\u00e9s de 25 mil\u00b7ligrams de nitrats per litre. No obstant aix\u00f2, a la UE es permet el consum d&#8217;aigua la concentraci\u00f3 de nitrats de la qual no superi els 50 mil\u00b7ligrams per litre, nivell, per cert, \u00e0mpliament superat en molts aq\u00fc\u00edfers espanyols (per exemple, segons les dades d\u2019 Ecologistes en Acci\u00f3, les an\u00e0lisis de deus a la comarca d&#8217;Osona, a Catalunya, van donar \u00edndexs de nitrats per sobre dels 400 mil\u00b7ligrams per litre).<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" alignright size-full wp-image-7937\" src=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2016\/02\/contaminacion_purines.jpg\" width=\"300\" height=\"225\" alt=\"contaminacion purines\" style=\"margin: 0px 5px 0px 10px; float: right;\" srcset=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2016\/02\/contaminacion_purines.jpg 1000w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2016\/02\/contaminacion_purines-300x225.jpg 300w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2016\/02\/contaminacion_purines-768x576.jpg 768w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2016\/02\/contaminacion_purines-80x60.jpg 80w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2016\/02\/contaminacion_purines-265x198.jpg 265w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2016\/02\/contaminacion_purines-696x522.jpg 696w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2016\/02\/contaminacion_purines-560x420.jpg 560w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p><strong>Les &#8220;batzegades&#8221; de la normativa<\/strong><\/p>\n<p>Despr\u00e9s del Reial Decret que es va aprovar a Espanya el 1998, sobre renovables, residus i cogeneraci\u00f3 (l&#8217;obtenci\u00f3 d&#8217;energia el\u00e8ctrica i t\u00e8rmica simult\u00e0niament), es va decidir incentivar projectes privats de desimpacte de purins aplicant aquest m\u00e8tode i hem arribat a tenir al voltant de 30 plantes a Espanya (molt lluny de les 1400 d&#8217;It\u00e0lia o les 9000 d&#8217;Alemanya).<\/p>\n<p>ADAP, l&#8217;Associaci\u00f3 d&#8217;Empreses per al Desimpacte Ambiental dels Purins, que agrupa aquestes empreses de plantes de cogeneraci\u00f3, ha comptabilitzat que <strong>a Espanya es generen m\u00e9s de 7 milions de tones d&#8217;excedents contaminants.<\/strong><\/p>\n<p>En aquestes plantes, s&#8217;obt\u00e9 un adob org\u00e0nic sec i aigua neta, a m\u00e9s de generar electricitat i proporcionar calor. El proc\u00e9s evita tamb\u00e9 l&#8217;emissi\u00f3 de gasos vol\u00e0tils i per tant d&#8217;olors. No obstant aix\u00f2, al febrer de 2014, sis plantes de tractament de purins de Catalunya van deixar de processar 600 milions de litres des del seu tancament per la retallada a la generaci\u00f3 d&#8217;energies renovables. Davant del tancament de plantes, l&#8217;Associaci\u00f3 de Productors de Bestiar Porc\u00ed (Anprogapor), anunciava que algunes granges havien optat per ampliar les anomenades basses d&#8217;emmagatzematge en les seves finques, de manera que poden tenir emmagatzemat durant gaireb\u00e9 un any els purins per despr\u00e9s emprar-lo en abonat del terreny proper a la granja.<\/p>\n<p>No obstant aix\u00f2 controlar les bones pr\u00e0ctiques i els abocaments de purins \u00e9s molt complicat.<\/p>\n<p>Encara que existeix alguna normativa com a real decret d&#8217;ordenaci\u00f3 de les explotacions porcines i algunes altres lleis auton\u00f2miques la veritat \u00e9s que <strong>no es fa un seguiment ni vigil\u00e0ncia adequats per part de l&#8217;Administraci\u00f3<\/strong> i encara trobem moltes granges amb m\u00e9s porcs dels autoritzats, abocaments directes a lleres p\u00fabliques, basses clarament inadequades i ineficaces .. i quan se sancionen, l&#8217;import a pagar \u00e9s insignificant per al terrible dany causat.<\/p>\n<blockquote><p>Entre 2010 i 2014, nom\u00e9s a Catalunya, els agents rurals van detectar 75 abocaments de purins, dels quals 64 van acabar en un procediment administratiu, d&#8217;aquests, el 70% van culminar amb una sanci\u00f3, per un import que oscil\u00b7la entre 600 i 1.000 euros, segons el Departament d&#8217;Agricultura.<\/p><\/blockquote>\n<p><strong>Microalgues que s&#8217;alimenten de purins<\/strong><\/p>\n<p>Els investigadors del Departament d&#8217;Enginyeria Qu\u00edmica de la Universitat d&#8217;Almeria (UAL) han demostrat que les microalgues poden cr\u00e9ixer en les aig\u00fces residuals procedents d&#8217;explotacions porcines. Precisament el nitrogen i el f\u00f2sfor dels purins constitueixen la base de la nutrici\u00f3 d&#8217;aquests microorganismes verds. Segons els investigadors, &#8220;d&#8217;aquesta manera es podria tancar el cicle del nitrogen d&#8217;una forma positiva per a l&#8217;ecosistema&#8221;. L&#8217;\u00fas de purins per alimentar les microalgues, evitaria la fabricaci\u00f3 de fertilitzants i al mateix temps s\u2019 oferiria una soluci\u00f3 respectuosa amb el medi ambient per al problema de les deixalles de purins. A m\u00e9s amb el nitrogen dels purins es podria produir biomassa de microalgues que serviria, entre altres coses, per fabricar biofertilitzants per a l&#8217;agricultura.<\/p>\n<p>Podria ser aquesta una manera de recuperar el vincle entre la ramaderia i l&#8217;agricultura i conservar aix\u00ed la fertilitat del s\u00f2l i el bon estat de les aig\u00fces. Tot i aix\u00ed, haur\u00edem de plantejar-nos, si m\u00e9s no, <strong>la tornada a una explotaci\u00f3 familiar davant la industrial<\/strong>, per no repetir el de <strong>q\u00fcestionar tot el nostre model agroalimentari<\/strong> <strong>que poc t\u00e9 a veure amb la sostenibilitat del nostre planeta.<\/strong> De poc serviran les cimeres sobre el clima si no es prenen mesures respecte a aquests temes.<\/p>\n<p><strong>Autora:&nbsp;<\/strong>Marta Gandarillas, periodista. Bio Eco Actual<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La carn vermella de major consum mundial &eacute;s la carn de porc i la seva demanda en les &uacute;ltimes d&egrave;cades ha experimentat un fort increment, segons les dades de la FAO, l&rsquo;Organitzaci&oacute; de Nacions Unides per a l&rsquo;Alimentaci&oacute; i l&rsquo;Agricultura. El sector porc&iacute; ha assolit la xifra dels mil milions en 2015, el doble que [&hellip;]<\/p>\n","protected":false},"author":419,"featured_media":7936,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7164],"tags":[],"class_list":["post-7939","post","type-post","status-publish","format-standard","has-post-thumbnail","category-actualitat"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.0 (Yoast SEO v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>La mala gesti\u00f3 dels purins contamina aire, terres i aig\u00fces - Bio Eco Actual<\/title>\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.bioecoactual.com\/2016\/02\/05\/la-mala-gestion-de-los-purines-contamina-aire-suelos-y-aguas\/\" \/>\n<meta property=\"og:locale\" content=\"ca_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La mala gesti\u00f3 dels purins contamina aire, terres i aig\u00fces\" \/>\n<meta property=\"og:description\" content=\"La carn vermella de major consum mundial &eacute;s la carn de porc i la seva demanda en les &uacute;ltimes d&egrave;cades ha experimentat un fort increment, segons les dades de la FAO, l&rsquo;Organitzaci&oacute; de Nacions Unides per a l&rsquo;Alimentaci&oacute; i l&rsquo;Agricultura. 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