{"id":129697,"date":"2026-10-14T11:08:34","date_gmt":"2026-10-14T09:08:34","guid":{"rendered":"https:\/\/www.bioecoactual.com\/?p=129697"},"modified":"2026-10-14T11:08:34","modified_gmt":"2026-10-14T09:08:34","slug":"el-cacau-que-no-arriba-a-la-xocolata-nous-usos-per-a-la-closca","status":"publish","type":"post","link":"https:\/\/www.bioecoactual.com\/ca\/2026\/10\/14\/el-cacau-que-no-arriba-a-la-xocolata-nous-usos-per-a-la-closca\/","title":{"rendered":"El cacau que no arriba a la xocolata: nous usos per a la closca"},"content":{"rendered":"<p style=\"margin: 0 0 18px 0;\">Si hi ha un plaer compartit universalment, aquest \u00e9s la xocolata. La triem pel seu gust, aroma i propietats nutricionals. Tanmateix, la seva elaboraci\u00f3 genera una gran quantitat de biomassa: de fet, s&#8217;estima que nom\u00e9s entre el 10% i el 20% del fruit s&#8217;aprofita en la <a href=\"https:\/\/www.bioecoactual.com\/ca\/2025\/06\/19\/cacau-mes-car-afecta-productors-xocolata-ecologica\/\" target=\"_blank\" rel=\"noopener noreferrer\">producci\u00f3 de xocolata<\/a> i derivats, mentre que la resta es descarta com a residu.<\/p>\n<p><!--more--><\/p>\n<figure id=\"attachment_129692\" aria-describedby=\"caption-attachment-129692\" style=\"width: 1200px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-129692 size-full\" style=\"width: 100%; height: auto; display: block; border-radius: 28px; box-shadow: 0 18px 42px rgba(0,0,0,0.12); overflow: hidden;\" src=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2026\/10\/cascarilla.jpg\" alt=\"\" width=\"1200\" height=\"800\" srcset=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2026\/10\/cascarilla.jpg 1200w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2026\/10\/cascarilla-768x512.jpg 768w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2026\/10\/cascarilla-630x420.jpg 630w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2026\/10\/cascarilla-696x464.jpg 696w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2026\/10\/cascarilla-1068x712.jpg 1068w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption id=\"caption-attachment-129692\" class=\"wp-caption-text\">123RFLimited\u00a9sarymsakov<\/figcaption><\/figure>\n<div style=\"margin: 34px 0 0 0;\">\n<h2 style=\"font-family: Georgia, 'Times New Roman', serif; font-size: 30px; line-height: 1.25; margin: 0 0 16px 0; color: #111111;\">Com es generen els subproductes?<\/h2>\n<p style=\"margin: 0 0 18px 0;\">Abans de gaudir d&#8217;una rajola de xocolata, el cacau passa per un llarg proc\u00e9s de transformaci\u00f3 fins a convertir-se en un dels seus ingredients principals. Despr\u00e9s de la collita, les panotxes s&#8217;obren i se&#8217;n treuen els grans; les llavors, envoltades d&#8217;una polpa blanca i mucilaginosa, se sotmeten a fermentaci\u00f3 i assecatge. Posteriorment, els grans es torren, se&#8217;n retira la closca i es fragmenten, donant lloc als nibs de cacau, amb el seu caracter\u00edstic perfil sensorial.<\/p>\n<p style=\"margin: 0 0 18px 0;\">Al llarg d&#8217;aquest proc\u00e9s es generen tres subproductes principals: la pela del fruit, el muc\u00edlag i la closca de cacau. Mentre que la pela i el muc\u00edlag solen quedar a les zones de cultiu o processament primari, la closca, una pell fina que recobreix la llavor, acompanya el gra fins a la torrada, despr\u00e9s de la qual se separa. Aquesta coberta representa entre el 10 % i el 17 % del pes sec del gra, i s&#8217;estima que anualment se&#8217;n generen entre 700.000 i 900.000 tones a tot el m\u00f3n, de les quals fins a 300.000 tones es produeixen a Europa.<\/p>\n<p style=\"margin: 0;\">Durant d\u00e8cades, aquests subproductes s&#8217;han gestionat principalment com a residus. Tanmateix, estem desaprofitant una part valuosa del fruit del cacau?<\/p>\n<\/div>\n<div style=\"background: #fff8e6; border-radius: 24px; padding: 28px; margin: 34px 0; box-shadow: 0 14px 34px rgba(0,0,0,0.07);\">\n<h2 style=\"font-family: Georgia, 'Times New Roman', serif; font-size: 30px; line-height: 1.25; margin: 0 0 16px 0; color: #111111;\">Una petita coberta amb una qu\u00edmica sorprenent<\/h2>\n<p style=\"margin: 0 0 18px 0;\">Tot i que sembla una simple pell seca, la closca presenta un perfil qu\u00edmic i nutricional molt interessant. A difer\u00e8ncia del gra, que conserva la major part del greix en forma de mantega de cacau, la closca destaca pel seu alt contingut en fibra aliment\u00e0ria, al voltant del 50 %, que combina fraccions solubles i insolubles.<\/p>\n<p style=\"margin: 0 0 18px 0;\">Aporta entre un 12 % i un 27 % de prote\u00efna, amino\u00e0cids essencials com la leucina, la lisina, la fenilalanina i la valina, i minerals com el magnesi, el ferro i el calci. La seva riquesa qu\u00edmica inclou compostos bioactius, com els polifenols, entre els quals hi ha l&#8217;epicatequina i la catequina, associats a propietats antioxidants i cardioprotectores, i alcaloides, principalment cafe\u00efna i teobromina. Aquesta \u00faltima \u00e9s la m\u00e9s abundant, amb fins a un 1,8 %, i es caracteritza per una estimulaci\u00f3 suau i prolongada, a m\u00e9s d&#8217;efectes vasodilatadors i di\u00fcr\u00e8tics.<\/p>\n<p style=\"margin: 0;\">Aquesta combinaci\u00f3 de components converteix la closca en una mat\u00e8ria primera d&#8217;inter\u00e8s per a la valoritzaci\u00f3 sostenible de subproductes.<\/p>\n<\/div>\n<figure id=\"attachment_45656\" aria-describedby=\"caption-attachment-45656\" style=\"width: 1000px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-45656 size-full\" style=\"width: 100%; height: auto; display: block; border-radius: 28px; box-shadow: 0 18px 42px rgba(0,0,0,0.12); overflow: hidden;\" src=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2021\/03\/venta-de-cacao-certificado-1-1.jpg\" alt=\"\" width=\"1000\" height=\"665\" srcset=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2021\/03\/venta-de-cacao-certificado-1-1.jpg 1000w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2021\/03\/venta-de-cacao-certificado-1-1-768x511.jpg 768w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2021\/03\/venta-de-cacao-certificado-1-1-696x463.jpg 696w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2021\/03\/venta-de-cacao-certificado-1-1-632x420.jpg 632w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><figcaption id=\"caption-attachment-45656\" class=\"wp-caption-text\">Foto: Fairtrade Ib\u00e9rica<\/figcaption><\/figure>\n<div style=\"margin: 34px 0 0 0;\">\n<h2 style=\"font-family: Georgia, 'Times New Roman', serif; font-size: 30px; line-height: 1.25; margin: 0 0 16px 0; color: #111111;\">De residu a ingredient<\/h2>\n<p style=\"margin: 0 0 18px 0;\">Per la seva abund\u00e0ncia, baix cost i riquesa qu\u00edmica, la closca de cacau s&#8217;investiga per a la valoritzaci\u00f3 de residus, especialment en alimentaci\u00f3 i nutrac\u00e8utica. El seu \u00fas com a farina, extracte o substitut parcial d&#8217;ingredients permet enriquir productes de fleca i pastisseria amb fibra i antioxidants, a m\u00e9s d&#8217;aportar aroma i gust de xocolata. Tamb\u00e9 s&#8217;ha estudiat com a font d&#8217;antioxidants naturals i pectines amb propietats gelificants i texturitzants.<\/p>\n<p style=\"margin: 0 0 18px 0;\">Tamb\u00e9 s&#8217;utilitza en infusions: com que una part dels polifenols i alcaloides \u00e9s molt soluble en aigua calenta, s&#8217;extreu f\u00e0cilment i s&#8217;obt\u00e9 una beguda amb aroma de xocolata, contingut antioxidant i un suau efecte energitzant.<\/p>\n<p style=\"margin: 0 0 18px 0;\">El potencial de la closca va m\u00e9s enll\u00e0 de l&#8217;\u00e0mbit alimentari. En cosm\u00e8tica, s&#8217;han investigat extractes de closca com a font de compostos fen\u00f2lics i triterpens, com l&#8217;\u00e0cid olean\u00f2lic, per a formulacions amb possibles propietats despigmentants, antioxidants i antiinflamat\u00f2ries. Tamb\u00e9 se n&#8217;ha avaluat l&#8217;\u00fas com a exfoliant mec\u00e0nic per substituir materials particulats sint\u00e8tics.<\/p>\n<p style=\"margin: 0;\">La seva estructura lignocel\u00b7lul\u00f2sica, rica en cel\u00b7lulosa, hemicel\u00b7lulosa i lignina, permet utilitzar-la com a c\u00e0rrega o refor\u00e7 en matrius polim\u00e8riques f\u00f2ssils i de base biol\u00f2gica. Mitjan\u00e7ant extrusi\u00f3, emmotllament o termopremsat s&#8217;han desenvolupat materials compostos que incorporen biomassa de cacau, contribuint a valoritzar el subproducte i a desenvolupar alternatives als pl\u00e0stics derivats del petroli<\/p>\n<\/div>\n<div style=\"background: #ffffff; border-top: 3px solid #e5aa14; border-bottom: 3px solid #e5aa14; padding: 24px 0; margin: 34px 0;\">\n<p style=\"font-family: Georgia, 'Times New Roman', serif; font-size: 28px; line-height: 1.35; margin: 0; color: #111111; font-weight: bold;\">Aquesta combinaci\u00f3 de components converteix la closca en una mat\u00e8ria primera d&#8217;inter\u00e8s per a la valoritzaci\u00f3 sostenible de subproductes.<\/p>\n<\/div>\n<div style=\"background: #fff8e6; border-radius: 24px; padding: 28px; margin: 34px 0; box-shadow: 0 14px 34px rgba(0,0,0,0.07);\">\n<h2 style=\"font-family: Georgia, 'Times New Roman', serif; font-size: 30px; line-height: 1.25; margin: 0 0 16px 0; color: #111111;\">Quan ja no queda res per extreure<\/h2>\n<p style=\"margin: 0 0 18px 0;\">I qu\u00e8 passa quan ja hem extret tot all\u00f2 que ens interessa? S&#8217;acaba aqu\u00ed la hist\u00f2ria de la closca?<\/p>\n<p style=\"margin: 0 0 18px 0;\">Seguint una estrat\u00e8gia d&#8217;economia circular, despr\u00e9s de recuperar els compostos de m\u00e9s inter\u00e8s, la closca encara es pot sotmetre, per exemple, a processos de pir\u00f2lisi per obtenir biochar o biocarb\u00f3. Alternativament, aquestes restes es poden incorporar a processos de compostatge, retornant la mat\u00e8ria org\u00e0nica al s\u00f2l.<\/p>\n<p style=\"margin: 0;\">Aquest enfocament es coneix com a valoritzaci\u00f3 en cascada: aprofitar primer les fraccions de m\u00e9s valor afegit i destinar posteriorment els materials restants a aplicacions de menor exig\u00e8ncia tecnol\u00f2gica. D&#8217;aquesta manera, es maximitza l&#8217;aprofitament dels recursos i es minimitza la generaci\u00f3 de residus.<\/p>\n<\/div>\n<figure id=\"attachment_95416\" aria-describedby=\"caption-attachment-95416\" style=\"width: 1200px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-95416 size-full\" style=\"width: 100%; height: auto; display: block; border-radius: 28px; box-shadow: 0 18px 42px rgba(0,0,0,0.12); overflow: hidden;\" src=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2024\/10\/cacao.jpg\" alt=\"cacao\" width=\"1200\" height=\"800\" srcset=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2024\/10\/cacao.jpg 1200w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2024\/10\/cacao-768x512.jpg 768w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2024\/10\/cacao-630x420.jpg 630w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2024\/10\/cacao-696x464.jpg 696w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2024\/10\/cacao-1068x712.jpg 1068w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption id=\"caption-attachment-95416\" class=\"wp-caption-text\">123RFLimited\u00a9JanPietruszk<\/figcaption><\/figure>\n<p style=\"margin: 0 0 18px 0;\">La closca de cacau \u00e9s un bon exemple de com la ci\u00e8ncia i la consci\u00e8ncia ecol\u00f2gica poden canviar la nostra manera d&#8217;entendre un residu. Aix\u00ed, la valoritzaci\u00f3 de la closca ens recorda que molts dels residus d&#8217;avui es poden convertir en recursos de dem\u00e0 quan en coneixem la composici\u00f3 i dissenyem estrat\u00e8gies per aprofitar-la.<\/p>\n<div style=\"background: #ffffff; border-top: 3px solid #e5aa14; border-bottom: 3px solid #e5aa14; padding: 24px 0; margin: 34px 0;\">\n<p style=\"font-family: Georgia, 'Times New Roman', serif; font-size: 28px; line-height: 1.35; margin: 0; color: #111111; font-weight: bold;\">La veritable oportunitat no rau, per tant, a trobar un \u00fanic \u00fas per a la closca, sin\u00f3 a integrar-la en una cadena de valoritzaci\u00f3 en qu\u00e8 cada fracci\u00f3 es destina a l&#8217;aplicaci\u00f3 m\u00e9s adequada.<\/p>\n<\/div>\n<p><strong>Autora:<\/strong> Laura Morales Erazo, qu\u00edmica i investigadora predoctoral a l&#8217;INSA-UB.<\/p>\n<p><a href=\"https:\/\/www.bioecoactual.com\/ca\/subscripcio\/\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Subscriu-te<\/strong><\/a><strong> a la Newsletter i rep cada mes Bio Eco Actual gratis al teu correu<\/strong><\/p>\n<p><strong><em>Bio Eco Actual<\/em><\/strong>, <em>el teu mensual 100% ecol\u00f2gic<\/em><strong><br \/>\n<\/strong><a href=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2026\/09\/BioEcoActual_Catala_Octubre_2026.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><strong> Llegir Bio Eco Actual Octubre 2026<\/strong><\/a><\/p>\n<p><iframe style=\"border: none; width: 100%; height: 520px;\" src=\"\/\/e.issuu.com\/embed.html?d=bioecoactual_catala_octubre_2026&amp;hideIssuuLogo=true&amp;showOtherPublicationsAsSuggestions=true&amp;u=bioecoactual\" allowfullscreen=\"allowfullscreen\"> <\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Si hi ha un plaer compartit universalment, aquest &eacute;s la xocolata. La triem pel seu gust, aroma i propietats nutricionals. Tanmateix, la seva elaboraci&oacute; genera una gran quantitat de biomassa: de fet, s&rsquo;estima que nom&eacute;s entre el 10% i el 20% del fruit s&rsquo;aprofita en la producci&oacute; de xocolata i derivats, mentre que la resta [&hellip;]<\/p>\n","protected":false},"author":592,"featured_media":129693,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7164],"tags":[],"class_list":["post-129697","post","type-post","status-publish","format-standard","has-post-thumbnail","category-actualitat"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.6 (Yoast SEO v28.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>El cacau que no arriba a la xocolata: nous usos per a la closca - Bio Eco Actual<\/title>\n<meta name=\"description\" content=\"Durant d\u00e8cades, la closca de cacau s&#039;ha gestionat principalment com a residu. 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