Institut für Technischen Umweltschutz

103 Items

Recent Submissions
Production of extracellular DNA (eDNA) of the γ-Proteobacterium Rheinheimera sp. F8 in biofilms

Schuster, Anna-Kathrin (2017)

Abstract F8 is a gram-negative γ-Proteobacterium, which belongs to the genus Rheinheimera. The strain has been isolated from the South Saskatchewan River in Canada (Böckelmann, 2002). It has been discovered in previous studies that F8 releases DNA into the extracellular space (Böckelmann et al., 2006; Böckelmann et al., 2007). The aim of this study was a more detailed analysis of the F8 extrace...

Provision of water by halite deliquescence for Nostoc commune biofilms under Mars relevant surface conditions

Jänchen, Jochen ; Feyh, Nina ; Szewzyk, Ulrich ; de Vera, Jean-Pierre Paul (2015)

Motivated by findings of new mineral related water sources for organisms under extremely dry conditions on Earth we studied in an interdisciplinary approach the water sorption behaviour of halite, soil component and terrestrial Nostoc commune biofilm under Mars relevant environmental conditions. Physicochemical methods served for the determination of water sorption equilibrium data and survival...

Potentials and Barriers for Tantalum Recovery from Waste Electric and Electronic Equipment

Ueberschaar, Maximilian ; Jalalpoor, Daniel Dariusch ; Korf, Nathalie ; Rotter, Vera Susanne (2017)

Circular economy approaches aim to close material cycles along the value chain. As such, the circular economy can be a long-term strategy to mitigate the risks of critical raw material (CRM) supply. Tantalum, with a current end-of-life recycling rate of less than 1%, has been intermittently discussed as critical. Even though the specificity of tantalum applications and high-mass fractions of ta...

Enabling the recycling of rare earth elements through product design and trend analyses of hard disk drives

Ueberschaar, Maximilian ; Rotter, Vera Susanne (2015)

Hard disk drives consist of a complex mix of various materials. While Aluminum, Copper and Steel are easy to separate, actual recycling processes dilute containing rare earth elements to non-recoverable grades in other material streams. To enable future recycling of these materials an in-depth analysis of hard disk drives from Desktop PCs and Notebooks was carried out. Furthermore, possible rec...

Challenges for critical raw material recovery from WEEE

Ueberschaar, Maximilian ; Otto, Sarah Julie ; Rotter, Vera Susanne (2017)

Gallium and gallium compounds are more frequently used in future oriented technologies such as photovoltaics, light diodes and semiconductor technology. In the long term the supply risk is estimated to be critical. Germany is one of the major primary gallium producer, recycler of gallium from new scrap and GaAs wafer producer. Therefore, new concepts for a resource saving handling of gallium an...

Assessment of element-specific recycling efficiency in WEEE pre-processing

Ueberschaar, Maximilian ; Geiping, Julia ; Zamzow, Malte ; Flamme, Sabine ; Rotter, Vera Susanne (2017)

Pre-processing is a crucial step to ensure the efficiency of subsequent processes and the quality of recyclates. The efficiency of pre-processing can be affected by high losses to undesignated output fractions. Standard batch tests usually provide mass balances and are a good proxy for bulk materials balances (iron/steel, aluminum, plastics). This article aims at harmonizing methodologies and ...

Assessing recycling strategies for critical raw materials in waste electrical and electronic equipment

Ueberschaar, Maximilian (2017)

The circular economy is a strategy for reducing risks that result from the criticality of commodities in our economic system. Therefore, anticipatory planning of recycling infrastructure must consider the historical and future use of metals as well as detailed product characterizations. For bulk materials like plastics, industrial base metals (IBMs) such as steel, aluminum, copper, and precious...

Potential and recycling strategies for LCD panels from WEEE

Ueberschaar, Maximilian ; Schlummer, Martin ; Jalalpoor, Daniel ; Kaup, Nora ; Rotter, Vera Susanne (2017)

Indium is one of the strategically important materials, which have been characterized as critical by various industrialized countries. Despite its high relevance, only low recycling rates are realized. Its main application is in indium tin oxide (ITO), which is used in the production of liquid crystal displays (LCD). However, recovery strategies for indium from LCDs are not yet being implemente...

Amount of water needed to save 1 m3 of water: life cycle assessment of a flow regulator

Berger, Markus ; Söchtig, Michael ; Weis, Christoph ; Finkbeiner, Matthias (2015)

Water saving devices in the sanitary equipment, such as flow regulators, are assumed to be environmentally advantageous even though their environmental benefit has never been compared to the environmental burden caused during their production und disposal. Therefore, a life cycle assessment according to ISO 14044 has been conducted to identify and quantify the environmental effects throughout t...

Improving sustainability by technology assessment and systems analysis: the case of IWRM Indonesia

Lehn, Helmut ; Nayono, Suwartanti ; Lehmann, Annekatrin ; Kopfmüller, Jürgen (2016)

To support the implementation of the IWRM-Indonesia process in a water scarce and sanitation poor region of Central Java (Indonesia), sustainability assessments of several technology options of water supply and sanitation were carried out based on the conceptual framework of the integrative sustainability concept of the German Helmholtz association. In the case of water supply, the assessment w...

Analysis of community based nature oriented surface water treatment

Chakrabarti, Ronjon (2017)

In this thesis the development, implementation and analysis of a full scale pilot for drinking water supply is elaborated. The intention of the study lies in identifying and verifying methodologies, technologies and approaches which lead to the sustainable setup of water resource protection, water purification and distribution, with the aim of providing safe drinking water to all people in an a...

Dynamic variation of the microbial community structure during the long-time mono-fermentation of maize and sugar beet silage

Klang, Johanna ; Theuerl, Susanne ; Szewzyk, Ulrich ; Huth, Markus ; Tölle, Rainer ; Klocke, Michael (2015)

This study investigated the development of the microbial community during a long-term (337 days) anaerobic digestion of maize and sugar beet silage, two feedstocks that significantly differ in their chemical composition. For the characterization of the microbial dynamics, the community profiling method terminal restriction fragment length polymorphism (TRFLP) in combination with a cloning-seque...

Contribution to modeling of treatment and reuse of industrial wastewater

Hu, Kang (2017)

Membrane bioreactor (MBR) and reverse osmosis (RO) are membrane systems often applied for wastewater treatment and reuse. An integrated water and energy management model (IWEMM) was developed to simulate the water and the related energy fluxes of the production and wastewater reuse processes consisting of a MBR and RO. The results of a pilot-scale MBR and RO process that was conducted by the Co...

Screening indicators for the Sustainable Child Development Index (SCDI)

Chang, Ya-Ju ; Lehmann, Annekatrin ; Finkbeiner, Matthias (2017)

Since children are the key stakeholders supporting and being affected by sustainable development, the framework for the Sustainable Child Development Index (SCDI) was proposed. It addresses social, economic and environmental dimensions of sustainable development by considering seven relevant themes of child development, i.e., health, education, safety, economic status, relationship, environment...

Assessing the availability of terrestrial biotic materials in product systems (BIRD)

Bach, Vanessa ; Berger, Markus ; Finogenova, Natalia ; Finkbeiner, Matthias (2017-01-18)

Availability of abiotic resources has been a topic of concern in recent years, resulting in several approaches being published to determine their availability on country and product level. However, the availability of biotic materials has not been analyzed to this extent yet. Therefore, an approach to determine possible limitations to availability of terrestrial biotic materials over the entire...

Enhancing life cycle sustainability assessment

Neugebauer, Sabrina (2016)

Life Cycle Sustainability Assessment (LCSA) is often described as the most advanced approach for sustainability assessment, as its implementation allows for identifying trade-offs between the environmental, social and economic dimension. Yet, shortcomings for its practical implementation exist, as the three related methods – Life Cycle Assessment (LCA), Social Life Cycle Assessment (SLCA) and L...

Impacts of background organic matter on organic micro-pollutant adsorption onto activated carbon

Zietzschmann, Frederik (2016)

Adsorption using powdered or granular activated carbon (PAC, GAC) is an advanced treatment for the removal of organic micro-pollutants (OMP) from waters like drinking waters (DW) or wastewater treatment plant (WWTP) effluents. Such waters contain background organic matter (BOM) which can adsorb at the same time as OMP. This competitive adsorption adversely affects OMP removals. The present stud...

Entwicklung eines Verfahrens zur Bestimmung der dermalen Resorptionsverfügbarkeit bodenassoziierter Mineralölkohlenwasserstoffe

Görnitz, Mandy (2015)

Petroleum hydrocarbons (PHC) belong to the most widespread soil pollutants worldwide. Within the assessment of potential health risks due to PHC exposure via contaminated soils, an examination of the dermal absorption of soil contaminants is legally required. Typically, the total extractable amount of a contaminant in soil serves as a basis for risk assessment concerning the dermal uptake route...

Anthropogene Spurenstoffe und Krankheitserreger im urbanen Wasserkreislauf

Jekel, Martin ; Baur, Nina ; Böckelmann, Uta ; Dünnbier, Uwe ; Eckhardt, Alexander ; Gnirß, Regina ; Grummt, Tamara ; Hummelt, Daniel ; Lucke, Thomas ; Meinel, Felix ; Miehe, Ulf ; Mutz, Daniel ; Pflugmacher Lima, Stephan ; Reemtsma, Thorsten ; Remy, Christian ; Schlittenbauer, Linda ; Schulz, Wolfgang ; Seiwert, Bettina ; Sperlich, Alexander ; Stapf, Michael ; Zerball-Baar, Patricia van ; Wenzel, Melanie ; Zietzschmann, Frederik ; Ruhl, Aki Sebastian (2016)

Im Forschungsprojekt ASKURIS wurden das Auftreten und die Entfernung organischer Spurenstoffe und resistenter Krankheitserreger in urbanen Wasserkreisläufen erforscht. Neueste analytische Methoden wurden eingesetzt, um entlang des Wasserkreislaufes bekannte Substanzen in kleinsten Konzentrationen zu quantifizieren und unbekannte Spurenstoffe zu identifizieren. Deren Entfernung durch bestehende ...

Social Life Cycle Assessment in der Automobilindustrie

Karlewski, Hannah (2016)

Die zentrale Frage bei dieser Arbeit war, ob und wie eine Social Life Cycle Assessment (SLCA)-Methode in der Automobilindustrie basierend auf Unternehmensdaten konzipiert und in praktischen Anwendungsfällen umgesetzt werden kann. Dazu wurden automobilspezifische soziale Aspekte und Indikatoren erarbeitet und mehr als 400 Stakeholder der Daimler AG befragt. Des Weiteren wurden soziale Daten erho...