{"id":2166,"date":"2019-06-05T15:58:38","date_gmt":"2019-06-05T13:58:38","guid":{"rendered":"https:\/\/www.umweltperspektiven.ch\/?p=2166"},"modified":"2022-02-09T11:06:52","modified_gmt":"2022-02-09T10:06:52","slug":"klimawandel-sedimentablagerungen-erhoehen-methangas-aus-stauseen","status":"publish","type":"post","link":"https:\/\/www.organisator.ch\/en\/sustainability\/2019-06-05\/klimawandel-sedimentablagerungen-erhoehen-methangas-aus-stauseen\/","title":{"rendered":"Climate change: sediment deposition increases methane gas from reservoirs"},"content":{"rendered":"<figure id=\"attachment_2167\" aria-describedby=\"caption-attachment-2167\" style=\"width: 680px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-2167\" src=\"\/\/www.umweltperspektiven.ch\/wp-content\/uploads\/2019\/06\/20180806_Melist_Stausee_03-1.jpg\" alt=\"\" width=\"680\" height=\"435\" \/><figcaption id=\"caption-attachment-2167\" class=\"wp-caption-text\">Field tests at the TH K\u00f6ln investigated the causes of rising methane emissions in reservoirs: sinking water levels lead to an increase in methane emissions. A prototype now extracts methane gas from reservoirs. As a result, less methane gas is released into the atmosphere. (Photo: Eric Zimmermann, TH Cologne)<\/figcaption><\/figure>\n<p>The research project \"Methane Elimination from Reservoirs\" (MELIST) is funded by the European Regional Development Fund (EFRE.NRW). The research team from TH K\u00f6ln has developed interesting processes to contain the release of methane gas.<\/p>\n<p><strong>Methane responsible for global warming<\/strong><\/p>\n<p>Alongside carbon dioxide (CO2) and nitrogen, methane is one of the natural greenhouse gases responsible for climate change. Methane is 28 times more harmful than CO\u2082, but its lifetime in the atmosphere is significantly shorter at between nine and 15 years. In addition to natural sources such as swamps and forests, anthropogenic sources such as livestock farming, rice fields, and landfills are increasingly responsible for the sharp rise in methane levels in the atmosphere over the past twelve years.<\/p>\n<p>The significance of methane emissions from reservoirs is currently being investigated by various research teams around the world, including the scientists at LWU: \"Even the rather small Olsberg reservoir on the Ruhr, with a storage volume of 72,000 cubic meters, releases as many methane bubbles in one year as a passenger car does in one million kilometers of driving,\" says Yannick D\u00fcck, a doctoral student at TH K\u00f6ln and coordinator of the MELIST research project.<\/p>\n<p>Organic components of sediment deposits in reservoirs, such as leaves, are decomposed by bacteria, producing methane. Intensified agriculture or forest clearing increase the biomass in reservoirs. The methane dissolves in the water with dissolved oxygen to subsequently oxidize to CO\u2082 in the atmosphere.<\/p>\n<p><strong>High pressure vacuum cleaner for sediment deposits<\/strong><\/p>\n<p>The core of the prototype developed in the MELIST research project under the direction of Prof. Dr. Christian Jokiel is a high-pressure suction unit for sediment deposits and methane bubbles contained therein, which is installed on a floating platform. This platform sails continuously and largely automatically across a reservoir. In the process, the sediments are stirred up and absorbed together with the methane gas. This water-sediment-gas mixture is separated on the platform and the gas is extracted by a vacuum pump. Finally, the sediment is returned to the flowing water below the dam.<\/p>\n<p>In addition to prototype development, MELIST also includes field tests on the Urfttalsperre and Olsberg reservoirs in North Rhine-Westphalia: The TH K\u00f6ln team undertook continuous measurements of methane emission, investigated potential influencing factors and possible methane hot spots of the reservoirs in the period from November 2016 to March 2017. The emission measurements revealed that changes in the water level have an influence on the release of methane bubbles located in the sediment. If the water level falls, the water pressure decreases and methane bubbles can rise more easily. The result is relevant to emerging climatic changes: According to the study, prolonged dry periods, such as those experienced during the record-breaking heatwave summer of 2018, which cause water levels to drop, increase methane production. \"Rising temperatures, as expected due to climate change, will favor methane production,\" says Yannick D\u00fcck.<\/p>\n<p>In addition, sediment samples were taken from different reservoir depths in two reservoirs using a newly developed freeze-core method and examined in a computer tomograph. The method enables the collection of undisturbed sediment samples containing gas. In previous methods, samples are negatively affected by a decreasing water pressure and temperature change of the sample \"The frozen sediment cores give us conclusions about sediment stratification and the depth at which methane bubbles can be found. This is important information for dissolving and recording sediment deposits: How deep do you need to erode the sediment to absorb as much of the gas as possible? How often does one need to travel the reservoir? And how much energy is needed to remove the sediment? The sediments are different in every reservoir,\" says D\u00fcck.<\/p>\n<p>The next step is to optimize the continuous separation of sediment and gas. A follow-up project is planned for this purpose, in which researchers from the :metabolon teaching and research center are also involved. They will investigate whether and in what form the methane extracted from the reservoirs can be used for energy.<\/p>\n<p><a href=\"\/\/www.th-koeln.de\">www.th-koeln.de<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Das Forschungsprojekt \u201eMethanelimination aus Stauseen\u201c (MELIST) wird durch den Europ\u00e4ischen Fonds f\u00fcr regionale Entwicklung (EFRE.NRW) gef\u00f6rdert. Das Forscherteam der TH K\u00f6ln hat interessante Verfahren entwickelt, um die Freisetzung von Methangas einzud\u00e4mmen. Methan f\u00fcr Klimaerw\u00e4rmung verantwortlich Methan geh\u00f6rt neben Kohlendioxid (CO2) und Stickstoff zu den nat\u00fcrlichen Treibhausgasen, die f\u00fcr die Klimaver\u00e4nderung verantwortlich sind. Dabei ist Methan [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":9612,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_yoast_wpseo_focuskw":"Methangas","_yoast_wpseo_metadesc":"Forscher des Labors f\u00fcr Wasser und Umwelt (LWU) der TH K\u00f6ln haben zusammen mit der DB Sediments GmbH einen Prototypen entwickelt, um Methangas abzusaugen.","articlekey":"","footnotes":""},"categories":[580],"tags":[1219,596,1511,1701],"class_list":["post-2166","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sustainability","tag-forschungsprogramm","tag-klima","tag-klimaforschung","tag-methan"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Klimawandel: Sedimentablagerungen erh\u00f6hen Methangas aus Stauseen - Organisator<\/title>\n<meta name=\"description\" content=\"Forscher des Labors f\u00fcr Wasser und Umwelt (LWU) der TH K\u00f6ln haben zusammen mit der DB Sediments GmbH einen Prototypen entwickelt, um Methangas abzusaugen.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.organisator.ch\/en\/sustainability\/2019-06-05\/klimawandel-sedimentablagerungen-erhoehen-methangas-aus-stauseen\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Klimawandel: Sedimentablagerungen erh\u00f6hen Methangas aus Stauseen - 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Ein Prototyp saugt nun Methangas aus Stauseen ab. Dadurch wird weniger Methangas in die Atmosph\u00e4re freigesetzt. (Foto: Eric Zimmermann, TH K\u00f6ln)\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.organisator.ch\\\/sustainability\\\/2019-06-05\\\/klimawandel-sedimentablagerungen-erhoehen-methangas-aus-stauseen\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.organisator.ch\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Klimawandel: Sedimentablagerungen erh\u00f6hen Methangas aus Stauseen\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.organisator.ch\\\/#website\",\"url\":\"https:\\\/\\\/www.organisator.ch\\\/\",\"name\":\"Organisator\",\"description\":\"Kompetent. Praxisnah. 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