{"id":10200,"date":"2024-06-04T21:06:30","date_gmt":"2024-06-04T19:06:30","guid":{"rendered":"https:\/\/maresmecircular.cat\/?p=10200"},"modified":"2024-06-04T21:06:30","modified_gmt":"2024-06-04T19:06:30","slug":"maresme-circular-reduces-the-concentration-of-the-main-cause-of-odours-at-the-mataro-waste-treatment-plant-by-80","status":"publish","type":"post","link":"https:\/\/maresmecircular.cat\/en\/consortium\/maresme-circular-reduces-the-concentration-of-the-main-cause-of-odours-at-the-mataro-waste-treatment-plant-by-80\/","title":{"rendered":"Maresme Circular reduces the concentration of the main cause of odours at the Matar\u00f3 waste treatment plant by 80%"},"content":{"rendered":"<ul>\n<li>\n<h3><strong>The introduction of iron oxides in the process of biomethanisation of organic waste has considerably reduced the levels of H2S, the main cause of bad odours<\/strong><\/h3>\n<\/li>\n<li>\n<h3><strong>The intensity of the odour at the plant could be further reduced after the implementation of a pilot test of a deodorisation system in the biomethanisation hall<\/strong><\/h3>\n<\/li>\n<\/ul>\n<p><strong>Maresme Circular<\/strong>, the brand of the <strong>Maresme Waste Consortium<\/strong>, has begun to successfully apply an innovative solution to <strong>reduce the odorous impact<\/strong> of the Maresme Integral Centre for Waste Recovery. This involves the introduction of natural <strong>iron oxides<\/strong> in the digesters of the biomethanisation plant in order to reduce hydrogen sulphide (H2S) &#8211; the main cause of bad odours &#8211; from the decomposing organic matter.<\/p>\n<p>Due to this, an <strong>80%<\/strong> reduction in H2S concentration has been achieved since the iron oxides were incorporated, from <strong>2000-3000 ppm<\/strong> in 2022 to the <strong>400-500 ppm<\/strong> currently recorded. In addition, the intensity of the odour at the plant could be further reduced after the implementation of a pilot test of a deodorisation system in the biomethanisation hall.<\/p>\n<h3><strong>How does it work?<\/strong><\/h3>\n<p>The Maresme Integral Centre for Waste Recovery treats <strong>100,000 tonnes of organic matter<\/strong> each year from the remainder fraction of the <strong>Maresme and Vall\u00e8s Oriental<\/strong> regions. Once separated from the rejected material, this organic waste is treated by the anaerobic digestion process and transformed into <strong>biogas<\/strong>. During this biomethanisation process, the organic matter generates hydrogen sulphide, a colourless, flammable gas that smells like rotten eggs and is the main cause of the odorous impact of the plant and its surroundings.<\/p>\n<p>The iron oxide used is a compound of iron ore from the Teruel mines that reacts with hydrogen sulphide and <strong>neutralises<\/strong> it. In addition to reducing the concentration of odours in the biomethanisation plant, the iron oxides provide other advantages: it is a natural product that is non-toxic and non-corrosive and helps to increase biogas production.<\/p>\n<h3><strong>Investment of \u20ac75,000 per year<\/strong><\/h3>\n<p>This measure has been introduced after the concessionary company of the Maresme Integral Centre for Waste Recovery, <strong>UTE TEM<\/strong> (Maresme Ecological Treatments), studied its application and good results in other state waste treatment plants such as the <strong>Valdeming\u00f3mez Technological Park<\/strong> (Madrid).<\/p>\n<p>The cost of this solution is <strong>\u20ac40,000<\/strong> for the purchase of an automatic iron oxide dosing system and <strong>\u20ac75,000<\/strong> per year for the estimated <strong>160 tonnes <\/strong>of iron oxides needed anually.<\/p>\n<h3><strong>Pilot test of a deodorisation system<\/strong><\/h3>\n<p>In mid-April this year, Maresme Circular also launched a pilot test of a <strong>deodorisation system<\/strong> in the biomethanisation plant. An <strong>odour-inhibiting agent<\/strong> made up of <strong>natural and synthetic plant essences<\/strong> is dispersed in a nebulised form through pipes located at a great height in the building. The concentration values of odour units are currently being measured to assess the results of this system.<\/p>\n<p>These two measures are part of the <strong>action plan that Maresme Circular is implementing<\/strong> with the aim of <strong>minimising the odour impact<\/strong> of the Centre in the short term and are in addition to other actions carried out such as the <strong>improvement of the seals<\/strong> and <strong>ventilation systems<\/strong> of the biomethanisation building.<\/p>\n<div id=\"attachment_10193\" style=\"width: 766px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-10193\" class=\"wp-image-10193 size-full\" src=\"https:\/\/maresmecircular.cat\/wp-content\/uploads\/2024\/05\/Centre-Integral-de-Valoritzacio\u0301-de-Residus-del-Maresme_Marga-Cruz.jpg\" alt=\"\" width=\"756\" height=\"491\" srcset=\"https:\/\/maresmecircular.cat\/wp-content\/uploads\/2024\/05\/Centre-Integral-de-Valoritzacio\u0301-de-Residus-del-Maresme_Marga-Cruz.jpg 756w, https:\/\/maresmecircular.cat\/wp-content\/uploads\/2024\/05\/Centre-Integral-de-Valoritzacio\u0301-de-Residus-del-Maresme_Marga-Cruz-300x195.jpg 300w, https:\/\/maresmecircular.cat\/wp-content\/uploads\/2024\/05\/Centre-Integral-de-Valoritzacio\u0301-de-Residus-del-Maresme_Marga-Cruz-680x442.jpg 680w\" sizes=\"(max-width: 756px) 100vw, 756px\" \/><p id=\"caption-attachment-10193\" class=\"wp-caption-text\">The Maresme Integral Centre for Waste Recovery \/ Marga Cruz<\/p><\/div>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The introduction of iron oxides in the process of biomethanisation of organic waste has considerably reduced the levels of H2S, the main cause of bad odours The intensity of the odour at the plant could be further reduced after the implementation of a pilot test of a deodorisation system in the biomethanisation hall Maresme Circular,&#8230;<\/p>\n","protected":false},"author":2,"featured_media":10193,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[45],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v18.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Maresme Circular reduces the concentration of the main cause of odours at the Matar\u00f3 waste treatment plant by 80% | Maresme Circular<\/title>\n<meta name=\"description\" content=\"The introduction of iron oxides in the process of biomethanisation of organic waste has considerably reduced the levels of H2S, the main cause of bad odours\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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