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As part of the SDG graduate program CirCles, the potentials of innovative recycling paths for urban biowaste are being investigated in collaboration with the departments of Sustainable Marketing, Resource Management and Waste Technology as well as Grassland Science and Renewable Resources. The inter- and transdisciplinary project aims to close urban carbon cycles by providing biowaste free of foreign matter, processing it in a targeted manner and recycling it sustainably.
Currently, activated carbons based on hard coal or coconut are mainly used for the targeted removal of organic trace substances from wastewater matrices. Alternatively, bio-waste can be used for the production of bio-based activated carbons in order to minimize greenhouse gas emissions and other harmful effects. At the Department of Urban Water Management, the substitution of fossil auxiliaries in advanced wastewater treatment by biobased activated carbons is being researched within CirCles and investigated for its real sustainability potentials. Special attention is paid to the influence of different process parameters during activated carbon production on the achievable adsorption performance as well as the simulation-based description of the adsorption processes on biobased activated carbons.
Project partners: University of Kassel:
Department of Urban Water Management
Department of Sustainable Marketing
xml-ph-0036@deepl. Resource Management and Waste Engineering
Associated partners: Stadtreiniger Kassel Kassel district KASSELWASSER xml-ph-0037@ and Garden Department of the City of Kassel
Duration: 09/2022 - 02/2026
Funding: University of Kassel
Links: Project homepage CirCles
Recovering raw materials from wastewater and advancing climate protection: This is the goal of the RoKKa research project.
For this purpose, we are investigating the different processes of targeted phosphorus elimination from wastewater at the FG Urban Water Management under the new objective of developing a local phosphorus source for microalgae for the production of beta-glucans as plant biostimulants and for fertilizer production. In addition, we are concerned with the climate compatibility of the bioeconomic production processes from wastewater investigated in RoKKa. A key role is played by nitrous oxide (N2O), since one gram of N2O contributes 265 times as much to the greenhouse effect in 100 years as one gram ofCO2. Direct nitrous oxide emissions occur during wastewater treatment as intermediate and by-products of biological nitrogen elimination. Accordingly, innovative separation and utilization of nitrogen from wastewater also holds great climate protection potential.
Project partners:University of Kassel (FG SWW)Umwelttechnik BW GmbH (joint coordinator) Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB University of Stuttgart (IGVP)TU Kaiserslautern (FG rewa)SolarSpring GmbHDeukum GmbHNanoscience for life GmbHCity of ErbachSpecial purpose association sewage treatment plant Steinhäule
Duration: 08.11.2021 - 31.03.2024
Funding:Ministry for Environment, Climate and Energy Baden-WürttembergEuropean Union
Project management: Prof. Dr.-Ing. Tobias Morck
The DecS project pursues the vision of removing organic trace substances from wastewater streams in the most targeted way possible and relieving the necessary use of resources of the available technologies (ozone, PAH, GAK). DecS makes use of the driver of digitalization by intelligently processing continuously collected measurement data from a new online sensor system and networking it with digital model images. In doing so, DecS explores the real sustainability potentials of digitized trace substance elimination and answers general questions about simulation-supported process optimization on water management plants. The feasibility of large-scale implementation is being tested in digital real laboratories (Dülmen wastewater treatment plant, Bad Sassendorf wastewater treatment plant) in order to be able to gather concrete experience in the interaction of digital instruments in the sense of a proof of concept.
Project partners:University of Kassel (FG SWW, network coordination).UNISENSOR Sensor Systems GmbHifak e.V. MagdeburgLippe Association (EGLV)Weber Engineers GmbH
Duration: 04/2021 - 10/2023
Funding:Federal Ministry of Education and Research (BMBF) Digital GreenTech - Environmental technology meets digitalization
Project Management: Prof. Dr.-Ing. Tobias Morck / Janna Parniske, M.Sc.
Links: Project homepage DecS
The submerged membrane processes currently used for wastewater treatment are mainly static processes. The membrane fibers or plates are bundled in a rack, which in turn is permanently installed in the reactor. The required overflow to control the top layer is mainly achieved by the introduction of air. For this reason, submerged membrane systems require significantly more aeration energy compared to conventional systems and also have significantly greater cleaning and maintenance requirements. Within the scope of the research work, a new type of membrane development is being investigated with the aim of significantly expanding the flux and solids content of currently used systems by means of a new type of design with short membrane fibers and by rotating the fibers. This is to be achieved with lower backwash intervals and air volumes at the same time.
Project partner: University of Kassel (FG SWW)
Funding: Own funds
At the Achern wastewater treatment plant, powdered activated carbon is simultaneously dosed into the biological stage of the wastewater treatment plant for further elimination of trace substances. In addition to the demonstration for the simple implementation of the process, the project will develop operating settings that can be transferred to other wastewater treatment plants to ensure a functioning and at the same time economical operation of the process. This will be supported by a simulation-based description of the relevant processes. The project is divided into two phases. In phase 1, preliminary investigations are carried out in the laboratory as well as on a semi-technical scale in order to gain knowledge for the design of the large-scale realization of the project. By means of a semi-industrial test plant, the questions concerning the powder activated carbon requirement, the dosing strategy and the effects on the capacity reserves of the biological stage are to be investigated in particular. Phase 2 will examine the extent to which the findings can be verified on an industrial scale. In addition, the mode of operation will be optimized in this phase. The two phases are separated in time by the construction or installation of the technical plant components for the expansion of the Achern wastewater treatment plant to include the process of simultaneous dosing of powdered activated carbon.
Project partners:University of Kassel (FG SWW), City of Achern, Weber Engineers GmbH
Duration: 09/2019 - 06/2023
Funding: State of Baden-Württemberg
Project Management: Prof. Dr.-Ing. Tobias Morck
Within the framework of PAKauf, an adsorption stage with powdered activated carbon in accumulation mode (PAK-SBR) is being tested in semi-industrial trials for further elimination of trace substances. The investigations will be supported by a simulation-based description of the process operations in order to be able to answer questions on the optimization of the cycle phases, among other things.
Project partners: University of Kassel (FG SWW), AZV Lower Sulm Valley, Weber Engineers GmbH, Competence Center Trace Substances Baden-Württemberg (KomS)
Duration: 03/2021 - 02/2022
Funding: State of Baden-Württemberg