Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2025
Authors
Michel VerheulAbstract
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Authors
Getachew Birhanu Abera Aryan Bhusal Thea Os Andersen Shuai Wang Nabin Aryal Svein Jarle Horn Lu FengAbstract
In-situ biomethanation is an efficient process for converting carbon dioxide (CO2) to methane (CH4) using hydrogen (H2) alongside anaerobic digestion (AD) process. However, AD of protein rich substrate often leads to the accumulation of ammonia nitrogen at high concentration. As a major inhibitor, this accumulation affects not only the AD process but also in-situ biomethanation. This study investigated the impact of ammonia nitrogen (0.5–5 g/L) on biomethanation performance using anaerobic moving-bed biofilm reactors (AnMBBRs). Without biofilm/biocarrier support, methane production was significantly inhibited above 3 g/L of ammonia nitrogen. In contrast, AnMBBR maintained high methane yields of 156.5 NmL/Lreactor at 2.5 g/L and 151.3 NmL/Lreactor at 5 g/L ammonia nitrogen, representing increases of 49 % and 76 %, respectively, compared to reactors without biofilm. Microbial analysis via 16S rRNA sequencing showed that Methanothermobacter, a thermophilic hydrogenotrophic methanogen, increased in relative abundance under ammonia nitrogen stress, which was further supported by carbon isotope analysis. Overall, these results highlighted the potential of AnMBBR to overcome ammonia nitrogen stress in in-situ biomethanation.
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Authors
Stephan Arnold Geoffrey Smith Geir-Harald Strand Gerard Hazeu Michael Bock Barbara Kosztra Christoph Perger Gebhard Banko Tomas Soukup Nuria Valcarcel Sanz Stefan Kleeschulte Julian Delgado Hernandez Emanuele MancosuAbstract
The demand for land monitoring information continues to increase, but the range and diversity of the available products to date have made their integrated use challenging and, at times, counterproductive. There has therefore been a growing need to enhance and harmonise the practice of land monitoring on a pan-European level with the formulation of a more consistent and standardised set of modelling criteria. The outcome has been a paradigm shift away from a “paper map”-based world where features are given a single, fixed label to one where features have a rich characterisation which is more informative, flexible and powerful. The approach allows the characteristics to be dynamic so that, over time, a feature may only change part of its description (i.e., a forest can be felled, but it may remain as forestry if replanted) or it can have multiple descriptors (i.e., a forest may be used for both timber production and recreation). The concept proposed by the authors has evolved since 2008 from first drafts to a comprehensive and powerful tool adopted by the European Union’s Copernicus programme. It provides for the semantic decomposition of existing nomenclatures, as well as supports a descriptive approach to the mapping of all landscape features in a flexible and object-oriented manner. In this way, the key move away from classification towards the characterisation of the Earth’s surface represents a novel and innovate approach to handling complex land surface information more suited to the age of distributed databases, cloud computing and object-oriented data modelling. In this paper, the motivation for and technical approach of the EAGLE concept with its matrix and UML model implementation are explained. This is followed by an update of the latest developments and the presentation of a number of experimental and operational use cases at national and European levels, and it then concludes with thoughts on the future outlook.
Authors
Alexander Jueterbock Clément Gauci Anne Margrete Leiros Nilsen Niko Steiner Ananya Khatei Griffin Goldstein Hill Leo Minini Christian Guido Bruckner Nikolai Buer Ralf Rautenberger Mark J. Cock Inka BartschAbstract
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