Polymer Differentiation with Computed Tomography: Opportunities and Limitations
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (12/2024)
In the context of polymer recycling, differentiation and analysis of various polymer types are crucial for effective material separation and reuse. This study explores the effectiveness of computed tomography (CT) in distinguishing between different types of polymers based on their density and elemental composition, facilitating more efficient recycling processes.
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (12/2024)
In the context of polymer recycling, differentiation and analysis of various polymer types are crucial for effective material separation and reuse. This study explores the effectiveness of computed tomography (CT) in distinguishing between different types of polymers based on their density and elemental composition, facilitating more efficient recycling processes.
Photovoltaics in Focus: Developments, Future Predictions and How the PVReValue Project aims to Recycle PV Modules
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (12/2024)
Photovoltaic (PV) technology is well on the way to playing a major role in global energy production. In recent decades, the worldwide use of photovoltaic technology has steadily increased, emphasizing the potential for a clean and sustainable future.
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (12/2024)
Photovoltaic (PV) technology is well on the way to playing a major role in global energy production. In recent decades, the worldwide use of photovoltaic technology has steadily increased, emphasizing the potential for a clean and sustainable future.
Digital Product Passport: Enabling Sustainable Supply Chain Management for Electric Vehicle Batteries
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (12/2024)
The circular economy is a transformative approach that aims to decouple economic growth from linear resource consumption, thereby promoting environmental sustainability and resource efficiency.
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (12/2024)
The circular economy is a transformative approach that aims to decouple economic growth from linear resource consumption, thereby promoting environmental sustainability and resource efficiency.
Value Chain Optimization for Metal Recycling Processes through Probabilistic Modeling
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (12/2024)
Optimizing the value chain in metal recycling processes presents significant challenges due to the complex nature of defining processes and the limited availability of sensor technologies capable of continuous monitoring (Golev & Corder 2016). Metal recycling remains at the forefront of industries advancing through expert knowledge and process simulation (Reuter et al. 2013).
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (12/2024)
Optimizing the value chain in metal recycling processes presents significant challenges due to the complex nature of defining processes and the limited availability of sensor technologies capable of continuous monitoring (Golev & Corder 2016). Metal recycling remains at the forefront of industries advancing through expert knowledge and process simulation (Reuter et al. 2013).
Towards closed material cycles in lithium-ion batteries and PV systems: a sustainable resource approach
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (12/2024)
This paper examines the critical role of recycling in the sustainable management of photovoltaic (PV) modules and lithium-ion batteries (LIBs), which are fundamental to the global transition to renewable energy supply.
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (12/2024)
This paper examines the critical role of recycling in the sustainable management of photovoltaic (PV) modules and lithium-ion batteries (LIBs), which are fundamental to the global transition to renewable energy supply.
Advancing Polypropylene Recycling: A Study on Possibilities to Improve Sorting Systems
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (12/2024)
The current use of recycled polypropylene (PP) is still limited as the quality cannot compete with virgin PP. In addition to other influences, the mixing of different types and grades of PP during recycling has a negative effect on the quality of the recycled PP.
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (12/2024)
The current use of recycled polypropylene (PP) is still limited as the quality cannot compete with virgin PP. In addition to other influences, the mixing of different types and grades of PP during recycling has a negative effect on the quality of the recycled PP.
Modification of the sewage sludge ash P-mineralogy by thermo-chemical
treatment with LF slags
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2022)
As an essential nutrient Phosphorus (P) is an important constituent in fertilisers used in agriculture. However, almost the entire amount of P used in Europe must be imported from sources worldwide. High amounts of P are concentrated in sewage sludge from mostly municipal sewage. From 2029 P-recycling from sewage sludge is mandatory for wastewater treatment plants in Germany. In this study, a process which uses a thermo-chemical treatment of sewage sludge ash (SSA) with Ca-carriers, is developed. The method succeeds in producing materials which match the demands for plant available P and as proven by chemical extraction and pot trials as required by national and European regulations for fertilisers. This was achieved by treating the molten SSA with burnt lime and slags from Ca-rich ladle furnace (LF-slag) which results in the formation of better soluble P-minerals in comparison to the phases whitlockite and apatite mostly abundant in SSA.
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2022)
As an essential nutrient Phosphorus (P) is an important constituent in fertilisers used in agriculture. However, almost the entire amount of P used in Europe must be imported from sources worldwide. High amounts of P are concentrated in sewage sludge from mostly municipal sewage. From 2029 P-recycling from sewage sludge is mandatory for wastewater treatment plants in Germany. In this study, a process which uses a thermo-chemical treatment of sewage sludge ash (SSA) with Ca-carriers, is developed. The method succeeds in producing materials which match the demands for plant available P and as proven by chemical extraction and pot trials as required by national and European regulations for fertilisers. This was achieved by treating the molten SSA with burnt lime and slags from Ca-rich ladle furnace (LF-slag) which results in the formation of better soluble P-minerals in comparison to the phases whitlockite and apatite mostly abundant in SSA.
Development of an approximation model for the evaluation of slag treatment strategies
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2022)
Sustainable management of resources and circular economy are key focal points of research and development activities within the iron and steel industry. In the project Slagreus, a novel approach enhancing internal and external recycling of basic oxygen furnace (BOF) slag has been developed.
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2022)
Sustainable management of resources and circular economy are key focal points of research and development activities within the iron and steel industry. In the project Slagreus, a novel approach enhancing internal and external recycling of basic oxygen furnace (BOF) slag has been developed.
“Spray-Slag” – Processing of liquid blast furnace slag
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2022)
Blast furnace slags are a by-product of iron production. These slags typically are used in powder form in the building industry, e.g. as an additive for cement production. Therefore, the liquid slags are wet granulated, dried and grinded, which is an energy, water and emission intensive process. To save natural resources, reduce the CO2-emissions and enhance the flowability of the particles, the liquid state of the slag and its heat energy could be utilized by atomizing the melt directly at the blast furnace.
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2022)
Blast furnace slags are a by-product of iron production. These slags typically are used in powder form in the building industry, e.g. as an additive for cement production. Therefore, the liquid slags are wet granulated, dried and grinded, which is an energy, water and emission intensive process. To save natural resources, reduce the CO2-emissions and enhance the flowability of the particles, the liquid state of the slag and its heat energy could be utilized by atomizing the melt directly at the blast furnace.
Improving the dry magnetic separation of BOF-slag by applying an
innovative pre-treatment process
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2022)
To approach circular economy by enhancing the internal recycling potential of BOFslag, an innovative pre-treatment process for the dry magnetic separation is investigated. It consists of slow-cooling to enlarge the slag crystals, followed by microwave irradiation to generate intergranular cracks to enhance the mineral liberation during comminution. It can be shown that the pre-treatment leads to an increase in the separation degree by at least four percent. This can be further enhanced by a factor of five by using solid-state oxidation.
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2022)
To approach circular economy by enhancing the internal recycling potential of BOFslag, an innovative pre-treatment process for the dry magnetic separation is investigated. It consists of slow-cooling to enlarge the slag crystals, followed by microwave irradiation to generate intergranular cracks to enhance the mineral liberation during comminution. It can be shown that the pre-treatment leads to an increase in the separation degree by at least four percent. This can be further enhanced by a factor of five by using solid-state oxidation.
