OOWV practical partner in nationwide research project Extracting salts from water - and enriching groundwater Langeoog/In Nord west. Falling groundwater levels and increasing salinization of groundwater are challenges of the present and consequences of climate change. Solutions are the focus of a nationwide research project with the participation of the Oldenburg-Ostfriesischer Wasserverband (OOWV) under the leadership of the Technical University of Dresden. Therefore, a pilot plant will be installed in the Langeoog waterwork for eight months from the end of 2022. In particular, it will remove sodium and chloride from the groundwater near the coast in order to subsequently infiltrate it again for the purpose of groundwater recharge. The aim is to develop special membranes for this process, through which the water can be purified accordingly. "It won't be of drinking water quality afterwards," reports Yannick Tiemann, project manager on the OOWV side, "but it can be fed into the groundwater body afterwards." It is also conceivable that the treated water could be used for industrial purposes, thus conserving drinking water resources. There is still a long way to go before the first concrete results are available - the research project entitled "innovatION" is at its beginning. Initial results are expected in 2024. The project is funded by the German Federal Ministry of Education and Research. "During the eight-month pilot phase at the Langeoog waterwork, we will be responsible for supervising the plant and taking samples of different waters - meaning groundwater, process water and water from the pilot plant. We share the samples and the results obtained from them with the project partners for laboratory tests," describes Yannick Tiemann. "Due to the globally increasing demand for water and the decreasing availability of freshwater resources, there is a worldwide interest in efficient desalination processes," states the "innovatION" project description of the TU Dresden. "We are pleased to be one of the two practical partners, along with the Kreisverband für Wasserwirtschaft Nienburg," says the OOWV project manager.He has also already been involved in "MULTI-ReUse," a water reuse process in which treated wastewater is further processed to make it available to local industry. Here, the plans for a large-scale plant with its own supply network in Nordenham are concrete. The plant will save around one million cubic meters of drinking water per year. After all, not every industrial process requires the valuable water in drinking water quality.
Research project develops sustainable, membrane-based water desalination processDue to the globally increasing demand for water and the decreasing availability of freshwater resources, there is a worldwide interest in efficient desalination processes. Freshwater that is influenced by the sea or by geogenic, i.e. natural, underground salt deposits often has high concentrations of sodium and chloride. High nitrate and sulphate concentrations usually result from agricultural influence. "Conventional desalination processes desalinate water completely and usually do not distinguish which salts are retained," explains Prof. Dr.-Ing. André Lerch, professor of the chair of process engineering in hydrosystems and coordinator of the innovatION joint project. "However, a complete desalination of the waters is often not useful, but only a reduction of the monovalent, singly charged ions."The aim of the innovatION research project is to develop an energy-efficient selective membrane-based desalination process for the targeted removal of monovalent ions from saline groundwater and surface water, and to examine potential applications and areas of use, taking into account water chemistry, economic and ecological aspects.innovatION stands for Selective Removal of Monovalent Ions from Saline Waters for Groundwater Recharge and Drinking Water Treatment. The joint project will be funded over the next three years by the Federal Ministry of Education and Research BMBF within the funding measure "Water Technologies: Water Reuse". innovatION brings together nine national partners from practice and science as well as two international associated partners. Within the framework of innovatION, selective membranes for specific retention of monovalent salts are being developed and installed in newly designed modules for use in an electrochemical process in laboratory and pilot plants. The plants will be used to carry out investigations to identify optimised process and plant parameters depending on different raw water qualities and treatment targets. The resulting effects and challenges for the different raw waters will be examined. The developed technology will be compared with international targets such as the sustainability goals using a holistic economic-ecological sustainability assessment in order to derive recommendations for action.By choosing partners from industry, science and practice, the consortium is able to build plants and test and evaluate the innovative technology on site with practical partners. Young scientists can be involved in cooperation and exchange with international scientists at an early stage. The results thus contribute significantly to securing water resources and further education, both nationally and internationally.
From 16 to 18 of March the annual conference of "ProcessNet Fachgruppen Computational Fluid Dynamics, Mischvorgänge und Agglomerations- und Schüttguttechnik", which is organized with the DECHEMA, took place in Leipzig. Besides talks and presentations from attendees regarding fundamental science or industrial scale applications, the innovatION project was also represented by David Schödel. For the "Computational Fluid Dynamics" group a poster from a prior Master Thesis, describing the approaches to our mMCDI model was presented and discussed.
From March 23rd to March 25th 2022, the conference of the Fachsektion Hydrogeologie e. V. of the DGGV (Deutsche Geologische Gesellschaft – Geologische Vereinigung) took place online, with the main topic "Groundwater - Climate - Society", in cooperation with the Friedrich Schiller Universität Jena. In the session "Artificial and natural groundwater reacharge" the PhD student Laura Bräunig and the Master student Mareike Schloo, Carl-von-Ossietzky Universität Oldenburg, could present their first results from the project "innovatION" on the geochemical interactions during the infiltration of a monovalent-partially desalinated water into dune sediments of the East Frisian island Langeoog in two posters and flash talks. Likewise, the meeting showed the increasing interest in research on methods and techniques for groundwater protection and understanding of groundwater quality, as well as processes during infiltration through the vadose zone. This reinforces the motivation of the "innovatION" project for the development of a monovalent-selective membrane and the importance of understanding geochemical reactions during artificial groundwater recharge with product water.
innovatION is a joint project which is focused on the development of a sustainable treatment and utilization of saline groundwater of the WavE-Network (https://bmbf-wave.de) of the Federal Ministry of Education and Research.In July 2021 all WavE-Partners came together for a launch event. The goal and content of innovatION were presented with the following three posters.
innovatION is a joint project which is focused on the development of a sustainable treatment and utilization of saline groundwater of the WavE-Network (https://bmbf-wave.de) of the Federal Ministry of Education and Research.In July 2021 all WavE-Partners came together for the WavE kick-off event. Hereby, Prof. Dr.-Ing. André Lerch presented the contents and goals of innovatION.