{"id":14021,"date":"2026-11-03T09:18:54","date_gmt":"2026-11-03T07:18:54","guid":{"rendered":"https:\/\/www.traveter.ee\/?p=14021"},"modified":"2026-11-03T09:18:54","modified_gmt":"2026-11-03T07:18:54","slug":"renewal-of-digester-gas-zone-concrete-protection-oisu-biogas-plant","status":"publish","type":"post","link":"https:\/\/www.traveter.ee\/en\/renewal-of-digester-gas-zone-concrete-protection-oisu-biogas-plant\/","title":{"rendered":"Renewal of the concrete protective coating in the digester gas zone \u2013 Oisu biogas plant"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"14021\" class=\"elementor elementor-14021 elementor-14014\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-8d26b7a elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"8d26b7a\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-34e1c4ee\" data-id=\"34e1c4ee\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7cd96abb elementor-widget elementor-widget-image\" data-id=\"7cd96abb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"2000\" height=\"360\" src=\"https:\/\/www.traveter.ee\/wp-content\/uploads\/2016\/07\/background-slice.png\" class=\"attachment-full size-full wp-image-3117\" alt=\"Ilupilt\" srcset=\"https:\/\/www.traveter.ee\/wp-content\/uploads\/2016\/07\/background-slice.png 2000w, https:\/\/www.traveter.ee\/wp-content\/uploads\/2016\/07\/background-slice-300x54.png 300w, https:\/\/www.traveter.ee\/wp-content\/uploads\/2016\/07\/background-slice-1024x184.png 1024w, https:\/\/www.traveter.ee\/wp-content\/uploads\/2016\/07\/background-slice-768x138.png 768w, https:\/\/www.traveter.ee\/wp-content\/uploads\/2016\/07\/background-slice-1536x276.png 1536w, https:\/\/www.traveter.ee\/wp-content\/uploads\/2016\/07\/background-slice-20x4.png 20w\" sizes=\"(max-width: 2000px) 100vw, 2000px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-335e12bc elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"335e12bc\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-65bf58e4\" data-id=\"65bf58e4\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-26c68566 elementor-widget elementor-widget-heading\" data-id=\"26c68566\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Renewal of the concrete protective coating in the digester gas zone \u2013 Oisu biogas plant<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-739f519 elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"739f519\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-5f3cf654\" data-id=\"5f3cf654\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-61a6fd94 zi-work-details elementor-widget elementor-widget-text-editor\" data-id=\"61a6fd94\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Traveter Grupp renewed the protective coating of the concrete in the digester gas zone at the Oisu Biogaas O\u00dc biogas plant. The upper part of a digester, where the concrete is in constant contact with biogas, is one of the most aggressive environments for concrete: biogenic sulphuric acid, formed through the combined action of moisture and hydrogen sulphide, quickly degrades unprotected concrete.<\/p><p>The works included roughening of the substrate and application of the Sika protective coating system Sikagard\u00ae-7000 CR, consisting of Sikagard\u00ae P 770 primer and Sikagard\u00ae M 790 protective coating. The coating was applied in two layers \u2013 a grey first coat and a red second coat.<\/p><p>Sikagard\u00ae-7000 CR is a highly chemical-resistant, crack-bridging system based on Xolutec\u00ae technology, designed specifically for protecting concrete structures in wastewater treatment plants, sludge treatment facilities and biogas tanks. The system resists biogenic sulphuric acid attack, remains flexible to accommodate structural movement, and its primer can be applied even to damp concrete. The system is approved by the German Institute for Building Technology (DIBt) for use on concrete in biogas facilities.<\/p><p>The works were carried out in July 2025.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-71ca6f67\" data-id=\"71ca6f67\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6fc3a8ee zi-work-details elementor-widget elementor-widget-text-editor\" data-id=\"6fc3a8ee\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Category:<\/strong> <a href=\"https:\/\/www.traveter.ee\/en\/waterproofing-of-tanks-and-pools\/\">Waterproofing works &#8211; tanks<\/a><br> <strong>Address:<\/strong> Oisu, T\u00fcri Parish, J\u00e4rva County, Estonia<br> <strong>Completed in:<\/strong> 2025<br> <strong>Client:<\/strong> Oisu Biogaas O\u00dc<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-31a634c6 elementor-widget elementor-widget-gallery\" data-id=\"31a634c6\" data-element_type=\"widget\" data-e-type=\"widget\" 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data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">More projects completed in this category:<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-645877b7 zi-work-related elementor-grid-3 elementor-grid-tablet-2 elementor-grid-mobile-1 elementor-widget elementor-widget-loop-grid\" data-id=\"645877b7\" data-element_type=\"widget\" data-e-type=\"widget\" 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The upper part of a digester, where the concrete is in constant contact with biogas, is one of the most aggressive environments for concrete: biogenic sulphuric acid, formed through the combined action of moisture [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":14013,"comment_status":"closed","ping_status":"open","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"footnotes":""},"categories":[45],"tags":[],"class_list":["post-14021","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-waterproofing-works-tanks"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"Traveter Grupp renewed the concrete protective coating in the digester gas zone of Oisu biogas plant with the acid-resistant Sikagard-7000 CR system.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" 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