{"id":44610,"date":"2026-10-21T11:00:18","date_gmt":"2026-10-21T09:00:18","guid":{"rendered":"https:\/\/resoilfoundation.org\/?p=44610"},"modified":"2026-10-16T10:51:48","modified_gmt":"2026-10-16T08:51:48","slug":"aquaculture-agriculture-waste-recovery","status":"publish","type":"post","link":"https:\/\/resoilfoundation.org\/en\/circular-bioeconomy\/aquaculture-agriculture-waste-recovery\/","title":{"rendered":"From aquaculture to agriculture, waste recovery connects value chains"},"content":{"rendered":"<h2>From sea to farmland, recovering value from by-products opens up new opportunities for agriculture and other industries. But circularity, an EU report stresses, requires collaboration throughout the value chain<\/h2>\n<p style=\"text-align: center;\">by Matteo Cavallito<\/p>\n<p>Mollusc shells, sludge from fish farms and fish processing <strong>residues<\/strong> can become raw materials for agriculture and other industries. Recovering this <strong>waste<\/strong> is the first step towards producing <strong>fertilisers and soil improvers<\/strong>, building materials, food and cosmetic ingredients, and creating value through the circular economy.<\/p>\n<p>For these solutions to work, however, value chains must <strong>connect those who generate residues with those who collect them<\/strong>, process them and use them. This requires infrastructure, skills, markets and clear rules. These opportunities are outlined in the <a href=\"https:\/\/aquaculture.ec.europa.eu\/key-documents\/implementing-strategic-guidelines-eu-aquaculture-circular-economy-aquaculture\" target=\"_blank\" rel=\"noopener\">report<\/a> \u201cCircular Economy in Aquaculture\u201d, published this year.<\/p>\n<div class='avia-iframe-wrap'>\n<blockquote class=\"wp-embedded-content\" data-secret=\"XrgyRFpoiF\"><p><a href=\"https:\/\/resoilfoundation.org\/en\/articles\/lobster-soil-potatoes-microbes\/\">US potatoes survive pests thanks to lobster shell<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"\u201cUS potatoes survive pests thanks to lobster shell\u201d \u2014 Re Soil Foundation\" src=\"https:\/\/resoilfoundation.org\/en\/articles\/lobster-soil-potatoes-microbes\/embed\/#?secret=2YmXCsUUMm#?secret=XrgyRFpoiF\" data-secret=\"XrgyRFpoiF\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/div>\n<h5>Connecting industries to recover resources<\/h5>\n<p>Prepared by the EU Aquaculture Assistance Mechanism within the framework of the European Maritime, Fisheries and Aquaculture Fund (EMFAF), the document identifies <strong>three pathways<\/strong>: using more circular inputs, making better use of aquaculture side-streams and integrating them into other sectors.<\/p>\n<p>\u201cIndustrial synergy and\/or symbiosis is a key good practice within circular economy strategies, enabling the exchange of materials, energy, water, and by-products <strong>between traditionally separated industries<\/strong> to create mutual environmental and economic benefits\u201d, states the report, which was recently discussed at a workshop <a href=\"https:\/\/cinea.ec.europa.eu\/news-events\/news\/when-waste-turns-resource-circular-economy-drives-dialogue-aquaculture-europe-2026-2026-10-02_en\" target=\"_blank\" rel=\"noopener\">held in Ljubljana<\/a> as part of <a href=\"https:\/\/www.aquaeas.org\/\" target=\"_blank\" rel=\"noopener\">&#8220;Aquaculture Europe 2026&#8221;<\/a>.<\/p>\n<div class='avia-iframe-wrap'>\n<blockquote class=\"wp-embedded-content\" data-secret=\"bhDa3TowkN\"><p><a href=\"https:\/\/resoilfoundation.org\/en\/articles\/norway-recycle-phosphorus-agriculture\/\">The Norwegian way to phosphorus recycling<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"\u201cThe Norwegian way to phosphorus recycling\u201d \u2014 Re Soil Foundation\" src=\"https:\/\/resoilfoundation.org\/en\/articles\/norway-recycle-phosphorus-agriculture\/embed\/#?secret=8bvKTMPYRA#?secret=bhDa3TowkN\" data-secret=\"bhDa3TowkN\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/div>\n<h5>From sludge to fertilisers for agriculture<\/h5>\n<p>One of the most significant examples is the recovery of <a href=\"https:\/\/resoilfoundation.org\/en\/environment\/enrichment-nutrients-forests-tropical\/\" target=\"_blank\" rel=\"noopener\">nutrients<\/a> from fish farms, where sludge can be treated through anaerobic digestion: alongside biogas, the process produces a residue that can be used to fertilise farmland. \u201cThe digestate (residual slurry) from the anaerobic digestion can be processed or directly applied as a <strong>biofertiliser<\/strong>, or through extraction methodologies, nutrients can be removed and purified, contributing to circular nutrient flows\u201d, the report explains, highlighting the potential to recover <strong>nitrogen and phosphorus<\/strong> for reuse on farmland.<\/p>\n<blockquote><p>Projects working towards this goal include <a href=\"https:\/\/aquaphoenix.eu\/\" target=\"_blank\" rel=\"noopener\">AQUAPHOENIX<\/a>, funded by Horizon Europe, and <a href=\"https:\/\/sea2landproject.eu\/\" target=\"_blank\" rel=\"noopener\">SEA2LAND<\/a>, which focuses particularly on sludge, viscera and off-specification fish to produce <strong>organic soil improvers<\/strong>, bio-based fertilisers and other products.<\/p><\/blockquote>\n<p>Commercial technologies are also available, including the <a href=\"https:\/\/waister.eu\/\" target=\"_blank\" rel=\"noopener\">Waister<\/a> system, which collects and dries fish farm sludge to turn it into a biofertiliser.<\/p>\n<div class='avia-iframe-wrap'>\n<blockquote class=\"wp-embedded-content\" data-secret=\"uFjLCRkTLX\"><p><a href=\"https:\/\/resoilfoundation.org\/en\/articles\/cyanobacteria-biofertilizers-for-soil\/\">Cyanobacteria are amazing biofertilizers for soil<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"\u201cCyanobacteria are amazing biofertilizers for soil\u201d \u2014 Re Soil Foundation\" src=\"https:\/\/resoilfoundation.org\/en\/articles\/cyanobacteria-biofertilizers-for-soil\/embed\/#?secret=obRQ6abo6j#?secret=uFjLCRkTLX\" data-secret=\"uFjLCRkTLX\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/div>\n<h5>New uses for shells, fish residues and nets<\/h5>\n<p>The projects also explore the use of <strong>mollusc shells<\/strong> in agriculture to produce <a href=\"https:\/\/www.bioga.org\/en\/ecocelta-patents-europes-first-ever-mascot-sand-made-of-mussel-shell\/\" target=\"_blank\" rel=\"noopener\">biofertilisers<\/a> for <a href=\"https:\/\/resoilfoundation.org\/en\/environment\/bacteria-grassland-soil-acidita\/\" target=\"_blank\" rel=\"noopener\">acidic soils<\/a>. Other initiatives, such as the <a href=\"https:\/\/betatechcenter.com\/projects\/biorefish\/\" target=\"_blank\" rel=\"noopener\">BioreFISH<\/a> project, aim to develop fermentation and enzymatic hydrolysis processes to recover compounds from fish by-products, with potential applications including biofertilisers and biostimulants.<\/p>\n<p>Another example is the European <a href=\"https:\/\/lifemuscles.eu\/\" target=\"_blank\" rel=\"noopener\">LIFE MUSCLES<\/a> project, co-funded by the EU under the <a href=\"https:\/\/eur-lex.europa.eu\/EN\/legal-content\/summary\/programme-for-the-environment-and-climate-action-life-2014-20.html\" target=\"_blank\" rel=\"noopener\">LIFE Programme 2014-2020<\/a>, which is testing <strong>biodegradable<\/strong> and <a href=\"https:\/\/resoilfoundation.org\/bioeconomia-circolare\/imballaggi-compostabili-decreto-legge\/\" target=\"_blank\" rel=\"noopener\">compostable<\/a> tubular nets on mussel farms and has developed a mobile plant to recycle polypropylene nets. By the end of 2025, almost 100 tonnes of polypropylene had been treated for reuse and 26 tonnes of biopolymer nets had been produced.<\/p>\n<div class='avia-iframe-wrap'>\n<blockquote class=\"wp-embedded-content\" data-secret=\"uGK6SI7VYr\"><p><a href=\"https:\/\/resoilfoundation.org\/en\/articles\/ue-biorecer-waste-bioproducts\/\">Researchers use circular strategies to turn waste into bioproducts<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"\u201cResearchers use circular strategies to turn waste into bioproducts\u201d \u2014 Re Soil Foundation\" src=\"https:\/\/resoilfoundation.org\/en\/articles\/ue-biorecer-waste-bioproducts\/embed\/#?secret=xtmB9Akuor#?secret=uGK6SI7VYr\" data-secret=\"uGK6SI7VYr\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/div>\n<h5>Circularity requires value chains and skills<\/h5>\n<p>Scaling up these solutions requires a coordinated approach and the ability to involve \u201cdownstream users (such as agricultural farmers, fertiliser producers and bio-based industries) <strong>to design circular products<\/strong> that meet their needs and quality expectations\u201d. Overcoming existing barriers related to funding, infrastructure and regulatory uncertainty over the classification and reuse of residues is also essential.<\/p>\n<p>Training is another key requirement. Circularity in aquaculture also depends on the ability to <strong>connect production, collection, processing and use<\/strong>. These skills are the focus of the <a href=\"https:\/\/blueaquaedu.eu\/\" target=\"_blank\" rel=\"noopener\">BlueAquaEdu<\/a> project, supported by EMFAF, which has developed online courses and training programmes covering topics such as fish farming, processing and the recovery of value from by-products.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>From sea to farmland, recovering value from by-products opens up new opportunities for agriculture and other industries. But circularity, an EU report stresses, requires collaboration throughout the value chain<\/p>\n","protected":false},"author":4,"featured_media":44613,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[155,134],"tags":[320,153,267,239,322,208],"class_list":["post-44610","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-circular-bioeconomy","category-articles","tag-agricoltura-en","tag-best-practice-en","tag-bioeconomia-circolare-en","tag-crops","tag-suolo-en","tag-waste"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Aquaculture and agriculture, waste recovery connects value chains<\/title>\n<meta name=\"description\" content=\"From sludge to fertilisers, from shells to compostable nets: aquaculture waste becomes a resource for agriculture\" \/>\n<meta name=\"robots\" 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