{"id":4873,"date":"2026-01-06T15:56:32","date_gmt":"2026-01-06T14:56:32","guid":{"rendered":"https:\/\/martinique2050.com\/holdex-environnement-une-solution-de-valorisation-des-sargasses-100-martiniquaise\/"},"modified":"2026-07-13T14:14:24","modified_gmt":"2026-07-13T18:14:24","slug":"holdex-environnement-une-solution-de-valorisation-des-sargasses-100-martiniquaise","status":"publish","type":"post","link":"https:\/\/martinique2050.com\/en\/holdex-environnement-une-solution-de-valorisation-des-sargasses-100-martiniquaise\/","title":{"rendered":"Holdex Environnement, a Martinique-based solution for Sargassum recovery: 100%!"},"content":{"rendered":"
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The good news comes from Holdex Environnement in Le Fran\u00e7ois, known under the brand name \u00abL\u2019id\u00e9e Verte\u00bb\u2026And this company, which produces organic soil amendments and was founded in 2007 by Mike Bernus, is certainly not short on ideas\u2014it has found a way to compost fresh sargassum!<\/strong><\/p>\n

An initiative by 100% Sustainable Development, 100% Local Supply Chain, and 100% Martiniquaise. Holdex specializes in the production of compost made primarily from local green and organic waste: sugarcane bagasse, laying hen manure, eggshells, and other natural materials derived from poultry byproducts and sugarcane\u2014and, more recently, sargassum seaweed!<\/strong><\/p>\n<\/blockquote>\n

<\/strong><\/p>\n

Martinique 2030: How long have you been working <\/strong> -you <\/strong>on this topic?<\/strong><\/p>\n

\"\"

M 2030: Does this algae bind heavy metals\u2014arsenic, and perhaps even chlordecone? Can it be considered a decontaminant? Could it be used to decontaminate soil? And in your case, how can we ensure the final product is uncontaminated?<\/strong><\/p>\n

MB:<\/strong> The entire Atlantic coast is currently affected by the problem of seaweed. As part of our recycling project, we were asked to collect the seaweed that washes ashore at Le Fran\u00e7ois, Le Vauclin, all the way to Sainte-Anne and Le Diamant. We therefore focused our analyses\u2014which were conducted by certified laboratories\u2014on the issues of arsenic and heavy metals, as well as chlordecone. It turned out that the test results for this geographic area showed no presence of chlordecone.<\/strong> No one has really focused much on the issue of chlordecone or whether this algae can accumulate it, but that will come. We had to submit all our test results to the relevant authorities because we\u2019re subject to very strict regulations in order to be allowed to operate.<\/p>\n

As for heavy metals, there is no question of using pure algae in our processes. We have conducted various experiments to establish these processes, followed by analyses comparing the results to the standards to which we are subject: NFU 44051 and NFU 44551. These standards specifically address the maximum permissible levels for heavy metals. Our results show that we are well below the established thresholds in this area. This is a major plus for us, since our policy and core business revolve around natural 100%; we produce for organic farming and use no chemical additives.<\/strong> We develop our products using only mechanical processes and by blending specific raw materials that we have identified in advance based on our needs and the results we wish to achieve. These materials play a specific role in the formulas we have developed for agriculture and consumers. We then compared our products with competing commercial products and found that our algae-based products contain significantly lower levels of heavy metals than those of our competitors.<\/p>\n

It\u2019s important to understand that we don\u2019t use pure seaweed. We face too many regulatory constraints to be able to do just anything, and besides, the quality of our products and the reputation of our registered brand are at stake. Our products are also intended for export. The challenge for our team is to create the best possible product\u2014one that\u2019s as natural as possible\u2014while complying with all regulations.\"\"

M 2030: You\u2019ve solved the problems of salinity, sand, and heavy metals\u2014what about the arsenic problem?<\/strong><\/p>\n

MB:<\/strong> There, too, we found levels below the standards, and we were asked to repeat the tests to verify this. The tests were conducted by an accredited laboratory and submitted to the relevant authorities, and everyone was surprised to see that the levels were well below the accepted standards. For us, Sargassum seaweed is, above all, an important source of trace elements and microorganisms in our products.<\/strong> Without giving everything away, it will accelerate the microbial activity in our products and serve as fuel for the microorganisms that interact between the soil and the plant.<\/p>\n

M 2030:<\/strong> What about H2S?<\/strong><\/p>\n

MB:<\/strong> It is present when seaweed decomposes, but we accept it when it has been on the shore for one to three days\u2014it\u2019s still fresh. And as soon as we receive it, we process it; we don\u2019t store it\u2014we repurpose it right away.<\/p>\n

M 2030: What is the process?<\/strong><\/p>\n

MB:<\/strong> I can't say\u2014it's a secret; there's a patent. We spent five years developing this. All I can tell you is that the seaweed is mixed immediately to prevent fermentation. The materials we use absorb the H2S.<\/p>\n

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MB:<\/strong> With the planned expansion to process sargassum, we\u2019re moving to a new operating model, since we currently process 25,000 metric tons of raw materials, and with the addition of sargassum, we\u2019ll increase that to 60,000 metric tons\u2014so our operating model is changing. We\u2019ve taken the necessary steps to ensure optimal recycling, and we\u2019ve positioned ourselves to 30,000 metric tons<\/strong> of seaweed per year.<\/strong> It will already be a good thing to be able to remove a large portion of what\u2019s along the coastline and provide relief to the people of Martinique. We\u2019ve started collecting it. Last week, we received 900 square meters from Anse Michel.<\/p>\n

M2030: Regarding trash collection, is it organized efficiently?<\/strong><\/p>\n

MB:<\/strong> The issue of cleanup is complicated because Martinique\u2019s terrain makes recovery difficult, and we also have to try to preserve the environments where they\u2019re located\u2014we don\u2019t want to damage them with excavators\u2026It\u2019s true that, given the extent of the damage, the response isn\u2019t fast enough, but this is a recent phenomenon we\u2019re not used to, so things are falling into place little by little. It\u2019s also an intermittent phenomenon\u2014sometimes there are debris piles, sometimes not. It turns out we\u2019ll be seeing more and more of them, but no one has a clear picture of what to expect. We can always do better, but I think we\u2019re making progress.<\/p>\n

M 2030: Is Sargassum a resource? <\/strong><\/p>\n

MB:<\/strong> For us, this represents considerable potential, but we need to determine what kind of potential we\u2019re seeking through the use of these algae. The strength of our business is that it isn\u2019t based on the processing of sargassum. If we don\u2019t have seaweed, we operate just fine, and if we do have it, we know what to do with it. We\u2019re not going to invest in a dedicated seaweed processing facility\u2014which would be prohibitively expensive\u2014to replace plastic, because the day there\u2019s no seaweed, we\u2019re stuck. We mustn\u2019t forget that we\u2019re an island. We have to work within our means. We\u2019ve integrated it into our business, which is why it took some time. We took an interest in this seaweed as soon as the first shipments arrived. It's still a valuable resource\u2014it all depends on how you use it.\"\"

M 2030: When will the first sargassum-based composts be available?<\/strong><\/p>\n

MB:<\/strong> In a year and a half! We have a year of work ahead of us because the process for recycling seaweed is quite complex. The products we\u2019ll be producing include organic soil amendments\u2014which are fertilizers free of chemical additives\u2014as well as other growing media, such as all-purpose potting soil and organic mulch\u2026 The goal is to replace imported products. We're proud of what we do because it's all made right here in Martinique; our products are of much higher quality than what you find on the market.<\/strong> We\u2019re right in the thick of sustainable development. Currently, all the imported potting soils we\u2019re aware of are made from peat\u2014a resource that\u2019s dwindling and isn\u2019t locally sourced. We\u2019ve been able to replace this material with locally sourced materials such as green waste and sugarcane bagasse\u2014these are clean products. We operate a short supply chain, distributing our products locally to businesses and individuals. The only thing we import are our bags.<\/p>\n

Interview by Nathalie Laul\u00e9<\/strong><\/p>\n

\u00a0<\/p>\n

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La bonne nouvelle vient du c\u00f4t\u00e9 de la Soci\u00e9t\u00e9 Holdex Environnement au Fran\u00e7ois, connue sous la marque \u00ab L\u2019id\u00e9e Verte \u00bb\u2026Et cette soci\u00e9t\u00e9 de production d\u2019amendements organiques, cr\u00e9\u00e9e en 2007 par Mike Bernus, ne manque pas d\u2019id\u00e9e puisqu\u2019elle a trouv\u00e9 une solution pour composter la sargasse fra\u00eeche ! Une initiative 100% D\u00e9veloppement Durable, 100% Circuit …<\/p>","protected":false},"author":1,"featured_media":4874,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_yoast_wpseo_meta-robots-noindex":"","_yoast_wpseo_canonical":"","_yoast_wpseo_opengraph-title":"","_yoast_wpseo_opengraph-description":"","_yoast_wpseo_twitter-title":"","_yoast_wpseo_twitter-description":"","footnotes":""},"categories":[1187,1614],"tags":[1560,1286,1561],"class_list":["post-4873","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","category-gestion-des-dechets-valorisation","tag-holdes-environnement","tag-sargasses","tag-valorisation"],"acf":[],"yoast_head":"\nHoldex Environnement, une solution de valorisation des sargasses 100% martiniquaise ! - martinique2050<\/title>\n<meta name=\"description\" content=\"La bonne nouvelle vient du c\u00f4t\u00e9 de la Soci\u00e9t\u00e9 Holdex Environnement au Fran\u00e7ois, connue sous la marque \u00ab L\u2019id\u00e9e Verte \u00bb\u2026Et cette soci\u00e9t\u00e9 de production\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/martinique2050.com\/en\/holdex-environnement-une-solution-de-valorisation-des-sargasses-100-martiniquaise\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Holdex Environnement, une solution de valorisation des sargasses 100% martiniquaise ! 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