FG Kreislaufwirtschaft und Recyclingtechnologie

19 Items

Recent Submissions
Co-Digestion of Rice Straw with Cow Manure in an Innovative Temperature Phased Anaerobic Digestion Technology: Performance Evaluation and Trace Elements

Muhayodin, Furqan ; Fritze, Albrecht ; Larsen, Oliver Christopher ; Spahr, Marcel ; Rotter, Vera Susanne (2021-04-29)

Rice straw is an agricultural residue produced in abundant quantities. Open burning and plowing back the straw to the fields are common practices for its disposal. In-situ incorporation and burning cause emissions of greenhouse gas and particulate matter. Additionally, the energy potential of rice straw is lost. Anaerobic digestion is a technology that can be potentially used to utilize the sur...

A Review of Composting Process Models of Organic Solid Waste with a Focus on the Fates of C, N, P, and K

Yang, Zheng ; Muhayodin, Furqan ; Larsen, Oliver Christopher ; Miao, Hong ; Xue, Bing ; Rotter, Vera Susanne (2021-03-06)

To foster a circular economy in line with compost quality assessment, a deep understanding of the fates of nutrients and carbon in the composting process is essential to achieve the co-benefits of value-added and environmentally friendly objectives. This paper is a review aiming to fill in the knowledge gap about the composting process. Firstly, a systematic screening search and a descriptive a...

Characterizing the Urban Mine—Simulation-Based Optimization of Sampling Approaches for Built-in Batteries in WEEE

Mählitz, Paul Martin ; Korf, Nathalie ; Sperlich, Kristine ; Münch, Olivier ; Rösslein, Matthias ; Rotter, Vera Susanne (2020-09-04)

Comprehensive knowledge of built-in batteries in waste electrical and electronic equipment (WEEE) is required for sound and save WEEE management. However, representative sampling is challenging due to the constantly changing composition of WEEE flows and battery systems. Necessary knowledge, such as methodologically uniform procedures and recommendations for the determination of minimum sample ...

WEEE Batteries - Sampling data

Mählitz, Paul Martin ; Korf, Nathalie ; Münch, Olivier ; Sperlich, Kristine ; Rösslein, Matthias ; Rotter, Vera Susanne (2020)

The attached data include the unit weight of more than 6000 waste electrical and electronic equipments (WEEE) and the batteries they contain. WEEE is classified according to the UNU keys (see Baldé, C.P.; Kuehr, R.; Blumenthal, K.; Gill, S.F.; Kern, M.; Micheli, P.; Magpantay, E.; Huisman, J.: E-waste statistics. Guidelines on classification, reporting, and indicators.). The WEEE batteries were...

A Review on the Fate of Nutrients and Enhancement of Energy Recovery from Rice Straw through Anaerobic Digestion

Muhayodin, Furqan ; Fritze, Albrecht ; Rotter, Vera Susanne (2020-03-18)

Open field burning and tilling the rice straw (RS) back into the fields causes environmental threats by contributing to the increased greenhouse gas emissions. Energy and nutrient recovery from RS through anaerobic digestion (AD) is an effective solution for its utilization. Although RS has good methane potential, its characteristics make it a difficult substrate for AD. This paper reviews the ...

Material Implications of Rural Electrification—A Methodological Framework to Assess In-Use Stocks of Off-Grid Solar Products and EEE in Rural Households in Bangladesh

Batteiger, Alexander ; Rotter, Vera Susanne (2018-02-07)

“Universal access to electricity” is proclaimed as the seventh sustainable development goal (SDG 7) of the United Nations (UN) Sustainable Development Goals list. The achievement of this goal will result in a rapid diffusion of energy technologies that would in turn increase materials stocks, subsequently increase the raw material demand as well as the arising waste flows. This study describes ...

Designing Away Waste: A Comparative Analysis of Urban Reuse and Remanufacture Initiatives

Ordóñez, Isabel ; Rexfelt, Oskar ; Hagy, Shea ; Unkrig, Luisa (2019-04-03)

In order to transform the economy into one that is circular, that recovers most materials through reuse, remanufacturing and recycling, these activities need to grow significantly. Waste management has substantially incorporated recycling as an end-of-life treatment but has still largely failed to incorporate remanufacturing and reuse as possible material recovery routes. This article aims to p...

Characterizing the Urban Mine—Challenges of Simplified Chemical Analysis of Anthropogenic Mineral Residues

Mählitz, Paul Martin ; Løvik, Amund N. ; Figi, Renato ; Schreiner, Claudia ; Kuntz, Claudia ; Korf, Nathalie ; Rösslein, Matthias ; Wäger, Patrick ; Rotter, Vera Susanne (2019-07-26)

Anthropogenic mineral residues are characterized by their material complexity and heterogeneity, which pose challenges to the chemical analysis of multiple elements. However, creating an urban mine knowledge database requires data using affordable and simple chemical analysis methods, providing accurate and valid results. In this study, we assess the applicability of simplified multi-element ch...

Valorization of Agricultural Residues

(2019-04-04)

Globally, food and agriculture production consume 30% of the world’s energy and produce around 20% of the worlds greenhouse gas (GHG) emissions . Acknowledging increasing global food demand, this highlights the urgency to move towards a Climate Smart Agriculture in South-East-Asia and beyond to tackle the global climate challenge. Valorization of agricultural residues is a promising approach bu...

Waste management and producer responsibility: a score behind - a new ahead

Rotter, Vera Susanne (2011)

In 2001, the Organisation for Economic Co-operation and Development (OECD) defined ‘extended producer responsibility’ (EPR) as ‘(...) an environmental policy approach in which a producer’s responsibility for a product is extended to the post-consumer stage of a product’s life cycle’. The aim was to encourage adoption of EPR principles such that manufacturers would design their products to optim...

Environmental evaluation of waste treatment scenarios for the towns Khanty-Mansiysk and Surgut, Russia

Kaazke, Julia ; Meneses, Montse ; Wilke, Berndt-Michael ; Rotter, Vera Susanne (2013)

Khanty-Mansiysk Autonomous Okrug – Ugra in Siberia has recently started to play a major role in the Russian economy because key oil and gas extraction sites are located in this region. As a result, the extensions of infrastructure and higher incomes have been leading to an accelerated population growth and consequent increase in the generation of solid household waste. The current methods of wa...

Prognosemodell zur Ermittlung von Auswirkungen des demografischen Wandels und der erweiterten Wertstofferfassung auf die Abfallströme und Behandlungskapazitäten

Kornau-Pitzer, Jasmin (2018)

Der demografische Wandel und der Ausbau der Wertstoff- und Biotonne haben einen grundlegenden Einfluss auf die Abfallmenge und Zusammensetzung und somit auch auf die quantitative und qualitative Auslastung der behandelnden Anlagen. Im Rahmen der vorliegenden Dissertation wurde ein Prognosemodell entwickelt mit dem die Auswirkungen der genannten Steuerungsgrößen auf die Abfallströme und behande...

Waste prevention for sustainable resource and waste management

Sakai, Shin-ichi ; Yano, Yasuhiro ; Asari, Misuzu ; Yanagawa, Ritsuki ; Matsuda, Takeshi ; Yoshida, Hideto ; Yamada, Tetsuji ; Kajiwara, Natsuko ; Suzuki, Go ; Kunisue, Tatsuya ; Takahashi, Shin ; Tomoda, Keijiro ; Wuttke, Joachim ; Mählitz, Paul ; Rotter, Vera Susanne ; Grosso, Mario ; Astrup, Thomas Fruergaard ; Cleary, Julian ; Oh, Gil-Jong ; Liu, Lili ; Li, Jinhui ; Ma, Hwong-wen ; Chi, Ngo Kim ; Moore, Stephen (2017-02-21)

Although the 2Rs (reduce and reuse) are considered high-priority approaches, there has not been enough quantitative research on effective 2R management. The purpose of this paper is to provide information obtained through the International Workshop in Kyoto, Japan, on 11–13 November 2015, which included invited experts and researchers in several countries who were in charge of 3R policies, and ...

Recycling Improves Soil Fertility Management in Smallholdings in Tanzania

Krause, Ariane ; Rotter, Vera Susanne (2018-02-26)

Residues from bioenergy and ecological sanitation (EcoSan) can be utilized to sustain soil fertility and productivity. With regard to certain cooking and sanitation technologies used in smallholder households (hh), we systematically analyzed how utilization of the respective potentials to recover residues for farming affects (i) soil nutrient balances, (ii) the potential for subsistence product...

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 ...

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...