The experimental results of the research on microbial electrochemical systems operating under mesophilic and hyperthermophilic conditions for methane production from CO\u2082 (electromethanogenesis or power-to-gas BEP2G) are reported. Hydrogenotrophic archaea from the Metanobacteriaceae family were selected, and innovative carbon-based materials doped with copper and hydroxyapatite were tested, achieving CO\u2082 reduction efficiency >80% and producing a methane precursor (formate) that is easily biodegradable. <\/p>\n","protected":false},"author":93,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"tags":[1603,1299],"targets":[1317],"rapporti_tipologie":[762],"class_list":["post-195997","rapporti","type-rapporti","status-publish","hentry","tag-biotechnology-en","tag-storage-en","targets-research","rapporti_tipologie-report-en"],"acf":{"projects":{"ID":191041,"post_author":"464","post_date":"2024-07-10 15:54:35","post_date_gmt":"2024-07-10 13:54:35","post_content":"","post_title":"Storage systems, including electrochemical and power-to-gas, and their interfaces with grids","post_excerpt":"The more ambitious the decarbonisation goals become, the more important energy storage is. The increasing penetration of non-programmable renewable energy sources (NPRESs) and the growing electrification of transport lead to a number of challenges related to the stability and flexibility of the national electrical system. The need to store excess renewable energy for later use where and when it is needed becomes evident.","post_status":"publish","comment_status":"open","ping_status":"closed","post_password":"","post_name":"storage-systems-including-electrochemical-and-power-to-gas-and-their-interfaces-with-grids","to_ping":"","pinged":"","post_modified":"2024-08-09 15:49:26","post_modified_gmt":"2024-08-09 13:49:26","post_content_filtered":"","post_parent":0,"guid":"https:\/\/www.rse-web.it\/progetti\/storage-systems-including-electrochemical-and-power-to-gas-and-their-interfaces-with-grids\/","menu_order":0,"post_type":"progetti","post_mime_type":"","comment_count":"0","filter":"raw"},"order_posts":"","dont_show_search":false,"related_posts":false,"dont_show_hompage":false,"show_on_slider":false,"single_post_data":{"titolo_spot":"","post_content":"
The report presents the results of experimental tests aimed at studying and optimizing processes of electromethanogenesis. This innovative biotechnology uses microbial electrochemical systems to produce methane from CO\u2082, following a power-to-gas (BEP2G) approach. In the experiments conducted, hydrogenotrophic microorganisms from the Methanobacteriaceae family (domain Archaea) were selected from a biogas digestate, and tested in dual-chamber bioelectrochemical systems. The methane produced, ranging from 0.3 to 0.8 mol\/m\u00b2g (normalized to the cathode area), is slightly lower than the yields reported in the literature. Additionally, materials for high-surface electrodes (porous terracotta and biochar composites) and nitrogen-doped carbons with Cu and hydroxyapatite (HAP) were studied as innovative chemical catalysts for CO\u2082 reduction (CO\u2082RR). The new Cu\/HAP-doped materials exhibited CO\u2082RR efficiencies greater than 80%, promoting the generation of formate, a precursor of methane that is easily biodegradable by hydrogenotrophic methanogenic archaea. Experiments at 80\u00b0C with hyperthermophilic hydrogen-producing bacteria in dual-chamber systems confirmed a strong affinity of Thermotoga neapolitana for electrodes polarized in the range of 0\u20131.2 V vs SHE. The use of these bacteria, along with the tested chemical catalysts, could represent an innovative, more efficient, and cost-effective approach to electromethanogenesis.<\/p>\n
Based on the results obtained, an experimental design was developed to define key parameters for optimizing methane yields in the electromethanogenesis process. An experimental setup was developed for the parallel execution of an optimized number of tests using enriched inoculum of Methanobacteriaceae. The identified experiments (24) are expected to provide statistically significant feedback both in relation to literature data and to the innovative approaches explored. The parameters considered in the experimental design include: i) type of material, ii) surface area of electrodes, iii) temperature, and iv) pH. Further electromethanogenesis tests will be conducted at 80\u00b0C, using pure strains of microorganisms and single- and dual-chamber cells, to determine which of the tested processes (mesophilic or hyperthermophilic) provides higher methane yields.<\/p>\n","link_estreno":false,"scarica_file":[{"download_option":"download","file_name":"Download Report","download":{"ID":165639,"id":165639,"title":"20010726","filename":"20010726.pdf","filesize":3086968,"url":"https:\/\/www.rse-web.it\/wp-content\/uploads\/2022\/05\/20010726.pdf","link":"https:\/\/www.rse-web.it\/en\/rapporti\/prove-sperimentali-di-fattibilita-del-processo-di-elettrometanogenesi-in-condizioni-di-mesofilia-e-ipertermia-su-elettrodi-carboniosi-e-multi-compositi-quali-componenti-chiave-delle-celle-di-elettrom\/attachment\/20010726\/","alt":"","author":"93","description":"","caption":"","name":"20010726","status":"inherit","uploaded_to":165637,"date":"2022-05-06 08:12:43","modified":"2022-05-06 08:12:43","menu_order":0,"mime_type":"application\/pdf","type":"application","subtype":"pdf","icon":"https:\/\/www.rse-web.it\/wp-includes\/images\/media\/document.png"}}],"button":{"text":"","link":""},"referente_group":false,"data_emissione":"2020-12-30","autori":"P. Cristiani, M. L. De Castro Carvalho, (RSE S.P.A.), M. Ferri, A. Goglio, G. Ghiara, Alessia Aiello, (University of Milan), G. D\u2019Ippolito (CNR-ICB Pozzuoli)","rapporto":"","rif_rse":"20010726"},"satellite_post_url":""},"yoast_head":"\n