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Filtration and activated carbon adsorption for further processing of municipal wastewater - removal of phosphorus and trace substances
According to conventional processes, wastewater from sewage treatment plants contains residual concentrations of organic substances and nutrients (such as phosphorus and nitrogen) and leads to an entry path for anthropogenic organic trace substances, microplastics as well as (antibiotic-resistant) bacteria and genes. Increasing quality requirements and growing water scarcity increasingly require the further treatment of municipal wastewater. Downstream filtration processes coupled with activated carbon adsorption offer a solution for this. Existing process technologies and the composition of the wastewater influence the effectiveness and necessity of downstream processes. The investigations for the further processing of the sewage treatment plant flow of the present work are divided into (1) characterization of the sewage treatment plant flow and derivation of surrogate parameters, (2) extensive removal of phosphorus and solids as well as (3) activated carbon filtration. In research focus (1) it could be shown that the total dissolved phosphorus (sTP) consists of about 90% dissolved reactive phosphorus (sRP) and 10% dissolved non-reactive phosphorus (sNRP), with sNRP = 51 ± 14 µg / l is. sNRP has a direct influence on the minimum TP effluent concentration. The investigations of the dissolved organic carbon (DOC) showed that about 21.5 ± 8.2% are biodegradable and thus offers further potential for downstream biological processes. Based on adsorption analyzes, it was possible to show that, on the one hand, 20 ± 3% of the DOC cannot be adsorbed and that biological processes lead to the decrease in the well to very well absorbing DOC fractions (K> 100 (mg / g) (l / mg) ( 1 / n)). For the detection of organic trace substances and thus the derivation of representative concentrations and loads, the developed method is suitable for the creation of weekly composite samples equivalent to 7 times 24-hour composite samples. In addition, the indicator was derived
Sewage treatment plant, wastewater treatment (more extensive), wastewater treatment, treatment processes, wastewater treatment, treatment processes, process engineering, filtration, adsorption, activated carbon filter, phosphorus elimination, trace substances, organic matter, elimination, functionality, efficiency, examination method, examination result, sewage purification plant, sewage conditioning, treatment process, sewage treatment, treatment process, process engineering, filtration, adsorption, carbon filter, phosphorus elimination, trace element, organic material, elimination, working principle, efficiency, investigation method, investigation findings,
Selbstverlag 2020, 201 pp., Ill., Tab., Lit.
Annual report 2018
Research project, innovation, bridge construction, system construction, recycling, polymer, hydrogen, heat storage, emission, energy system, technology transfer, research project, innovation, bridge construction, system construction, recycling, polymer, hydrogen, regenerator, emission, energy system, technology transfer, annual report , Materials testing institute, research area, wood technology, carbon fiber, circular economy, mobility, intermediate storage, energy flow, battery storage, sensor, photovoltaics, heat pump, carbon, reduction, future development, annual report, materials testing institute, field of research, wood engineering, carbon fiber, recycling management , mobility, cache, energy flow, sensor, photovoltaics, heat pump, carbon, reduction, future development,
Self-published 2019, 71 pp., Ill., Tab.
Evaluation and reduction of climate-relevant gases from waste incineration plants. Final report. Research code: 3714 42 313 3, UBA-FB: 002686. Online resource
Stöcklein, Frank (author, project manager); Tebert, Christian; Töfge, Kevin
The research project should help to improve the data situation with regard to the emission of climate-relevant gases such as nitrous oxide (N2O), methane (CH4) and fossil carbon dioxide during the incineration of waste in the approved plants. In addition, the relationship between the formation of nitrous oxide as a function of the nitrogen content of the waste, the incineration temperature and the oxygen content in the incineration, especially when incinerating sewage sludge, should be investigated. For this purpose, measurements were carried out at different incineration plants with different types of waste in order to determine the formation and release of climate-damaging gases.
Combustion plant, exhaust gas, carbon dioxide, evaluation, improvement measure, combustion plant, waste gas, carbon dioxide, evaluation, improvement measure, waste incineration plant, sewage sludge incineration, fluidized bed combustion, grate combustion, methane gas, nitrous oxide, greenhouse gas, gas leakage, climate influence, evaluation, emission reduction, measurement method, waste incineration plant, sewage sludge incineration, fluidized bed combustion, grate stoker furnace, methane gas, laughing gas, greenhouse gas, escape of gas, climatic influence, evaluation, emission reduction, measuring method,
Self-published 2018, 100 p., Ill., Tab., Lit.
Description and evaluation of possible effects of underground storage of carbon dioxide on selected environmental protection goods. Potential assessment, Paragraph 5 of the Carbon Dioxide Storage Act. Research code: 3711 16 125, UBA-FB: 002531. On line resource
Schütte, Peter; Kohls, Malte; Kattau, Sandra; Wittrock, Elith; Warnke, Michaela; Lienemann, Annette
In the research report, with regard to the environmental part of the potential assessment according to Section 5 Paragraph 3 of the Carbon Dioxide Storage Act, the possible effects of the underground storage of carbon dioxide (CCS) on the objects of protection of humans and human health, animals, plants, biological diversity, landscape, cultural and other material goods described and assessed abstractly. Both the intended as well as the improper operation of underground CO2 storage is taken into account.
Carbon dioxide, storage, health, plant, vegetation, animal world, impact analysis, evaluation, potential analysis, carbon dioxide, storage, health, plant, vegetation, fauna, analysis of effects, evaluation, capacity analysis, CO2, underground storage, impact, protected asset, human, Species diversity, biodiversity, cultural property, environmental impact, potential for conflict, approval procedure, legal basis, underground storage, effect, subject of protection, man, diversity of species, biodiversity, objects of cultural value, environmental impact, admission procedure, legal basis,
Selbstverlag 2018, V, 170 S., Fig., Tab., Lit., Schn.
Recommendations for action for life cycle assessments of bio-based products
Beck, Tabea; Albrecht, Stefan; Lindner, Jan Paul; Bos, Ulrike; Knüpffer, Eva
The main aim of sub-project 113 "Harmonization of life cycle assessments of bio-based products" and the project report is to show the special features of bio-based products, to present the various approaches and practices in the main subject areas concerned, and to make suggestions for standardization with reference to the Bioeconomy BW research program. As part of the recommendations for action, the topics of LCA approaches (attributional and consistent modeling), system boundaries, functional unit, allocation, carbon balance, nitrogen balance, water balance, land use and other relevant impact categories were examined and described with regard to their peculiarities in connection with life cycle assessments of renewable raw materials. Based on this, proposals were developed, for example for the consideration of fertilizer and machine use, for the consistent specification of calorific value and water content, for allocation based on physical properties for certain material flows. Further recommendations concern the separate accounting and reporting of biogenic carbon and the consideration of carbon emissions through land use change. The topics of water balance, soil degradation and biodiversity were examined in great detail and suggestions for the use of promising methods were developed.
Production, nitrogen, emission, production, nitrogen, emission, agriculture, fertilizer, use, use, resource conservation, environmental impact, environmental impact, biodiversity, soil, degradation, investigation method, life cycle assessment, carbon, water balance, accounting, recommendation for action, agriculture, fertilizer, use, protection of resources, environmental impact, environmental effect, biodiversity, soil, degradation, investigation method, ecobalance, carbon, water balance, balancing, recommended action,
Self-published 2017, 71 pp., Ill., Lit.
Insights into the load-bearing behavior of tensile stressed shear / embedment connections made of stainless steel
Abraham, Christoph; Stranghöner, Natalie
Load-bearing behavior, tensile stress, shear connection, embedment, stainless steel, screw, dimensioning, investigation, standardization, strength class, steel type, DIN, carbon steel, category, experiment, shearing, shear joint, test result, interaction, shear strength, angle, austenitic steel, load-bearing behavior, subjection to tension, shear connection, bolt-bearing, stainless, screw, design, investigation, standardization, strength class, steel type, DIN, carbon steel, category, experiment, shear failure, shear joint, test result, interaction, shear strength, angle, austenitic steel,
Stahlbau Verlags- und Service GmbH 2020, pages 25-28, fig., Tab., Lit.
Series: 22nd DASt Research Colloquium in Karlsruhe. March 31, 2020 - April 1, 2020 at the KIT Steel and Lightweight Research Institute for Steel, Wood and Stones
Waste containing carbon fibers in thermal waste treatment - interim results from practical studies on an industrial scale
Stickschläder, Jan; Quicker, Peter; Thiel, Christopher; Beckmann, Michael; Baumann, Werner; Wexler, Manuela; Stapf, Dieter; Koralewska, Ralf
Carbon fiber, thermal, experiment, furnace, laboratory, waste-to-energy plant, incinerator, hazardous waste, CFRP, recycling, waste treatment, decomposition, oxidation, research, disposal, plastic waste, waste incineration, processing, investigation, municipal waste, exhaust gas cleaning, combustion chamber, sampling, dust measurement, gravimetry, Temperature, pitting, co-incineration, residue, slag, fly ash, microscope, analysis, carbon fiber, thermic, test, stove, lab, waste-fed power plant, combustion plant, special waste, recycling, refuse treatment, decomposition, oxidation, research, waste disposal, plastics waste, waste incineration, preparation, investigation, settlement waste, purification of waste gas, thrust chamber, sampling, dust measurement, gravimetry, temperature, pit, incineration, residue, slag, flue dust, microscope, analysis,
TK Thome-Kozmiensky Verlag 2019, pp 333-356, fig., Tab., Lit., graph. Darst.
Series: Energy from Waste, Volume 16
Processing of carbon concrete demolition material
Head, Florian; Kortmann, Jan
Research, carbon concrete, recycling, building rubble, composite building material, reinforcement, demolition material, processing technology, circular economy, waste treatment, field test, crushing, jaw crusher, attempt, sorting, camera, carbon fiber, fine fraction, research, recycling, waste, composite building material, reinforcement, demolition material , recycling management, refuse treatment, field test, comminuition, jaw crusher, test, classification, camera, carbon fiber, fine,
KIT Scientific Publishing 2019, p.132-145, fig., Lit.
Series: 30th BBB Assistant Meeting 2019 in Karlsruhe. Specialist congress for the scientific staff in the construction industry, construction operations, construction process engineering. 10th - 12th July 2019. Institute for Technology and Management in Construction (TMB), Karlsruhe Institute of Technology (KIT)
Structural monitoring of carbon fiber plastic composites in the automotive industry by means of integrated converter networks
Tschöke, K .; Gaul, T .; Schubert, L .; Dungern, F. von; Guerrero Santafe, J.
Plastic (fiber-reinforced), fiber composite material, fiber composite plastic, ultrasound, carbon fiber, laboratory test, semi-finished product, additive manufacturing, material technology, manufacturing process, plastic (fiber-reinforced), fiber composite material, fiber composite plastic, ultrasound, carbon fiber, laboratory test, semi-finished product, materials technology, manufacturing process,
Shaker 2019, pp. 287-298, fig., Lit.
Series: Smart structures and systems. Proceedings of the 4SMARTS symposium, 22.-23. May 2019, Darmstadt
Rosenstein pavilion: a light concrete shell modeled on biological structures
Kovaleva, Daria; Gericke, Oliver; Wulle, Frederik; Mindermann, Pascal; Sobek, Werner; Verl, Alexander; Gresser, Götz T.
Bionics, concrete shell, supporting structure, resource consumption, pavilion, optimization, strategy, grading, skeleton, tissue, porosity, compressive stress, construction principle, structure, property, load-bearing behavior, tension, material property, density, cross section, manufacturing process, function, requirement, morphogenesis, design process, Form development, module, segmentation, formwork, carbon fiber, 3D printer, digitization, sustainability, bionics, concrete shell, support structure, consumption of resources, pavilion, optimization, strategy, gradation, skeleton, tissue, porosity, compression loading, structural principle, structure, property, load-bearing behavior, stress, material characteristic, density, cross section, production method, function, requirement, morphogenesis, design process, form development, module, segmentation, formwork, carbon fiber, digitizing, sustainability,
Birkhäuser 2019, pp. 92-101, fig.
Series: Building bionically. Learn from nature
Magazine Articles (109):
Use and application of LC to the power of 3 cements in Africa and worldwide. Building materials of the future
Leo, Emmanuel S .; Alexander, Mark G .; Beushausen, Hans
Journal article from: BWI - BetonWerk International
Vol .: Vol. 24, No. 1, fig., Tab., Lit., graph. Darst., Kt., 2021, S.66-71, Fig., Tab., Lit., graf. Darst., Kt.
Concrete technology, application, environmental protection, cement consumption, carbon dioxide, emission, reduction, binder, limestone, kaolinite, ecology, cement industry, portland cement, clay, substitute, cement substitute, blast furnace slag, aluminum oxide, cement stone, sustainability, economic efficiency, precast industry, environmental balance, calcium carbonate formation, concrete technology , application, environmental protection, cement use, carbon dioxide, emission, reduction, binder, limestone, kaolinite, ecology, cement industry, portland cement, clay, substitute, cement substitute, granulated slag, aluminum oxide, hardened cement paste, sustainability, economy , prefabrication industry, environmental balance,
An overview of the use of UHFB in Colombia
Abellan Garcia, Joaquin
Journal article from: BWI - BetonWerk International
Vol .: Vol. 23, No. 5, fig., Tab., Lit., 2020, pp. 44-48, fig., Tab., Lit.
UHFB, high-strength concrete, fiber concrete, product development, application example, research, concrete compressive strength, durability, emerging country, pedestrian bridge, binding agent, carbon dioxide, silica dust, experiment, investigation, concrete mix, mix design, algorithm, mathematical model, study, concrete, steel fiber, standardization, limestone powder, Substitution, concrete technology, ultra-high-performance concrete, cement replacement, high-strength concrete, fiber-reinforced concrete, product development, example of application, research, concrete compressive strength, durability, newly industrializing country, footbridge, binder, carbon dioxide, silica fume, experiment, investigation , concrete mixing, mix design, algorithm, mathematical model, study, layer of concrete, steel fiber, standardization, limestone flour, stubsitution, concrete technology,
Bond behavior of subtractively machined CFRP rods in UHPC
Suppanz, Florian; Kromoser, Benjamin
Magazine articles from: Concrete and reinforced concrete construction
Vol .: Vol. 115, No. 7, fig., Tab., Lit., 2020, pp. 504-513, fig., Tab., Lit.
CFRP, composite behavior, reinforcement bar, carbon fiber, tensile strength, filigree, concrete component, load-bearing behavior, concrete composition, ultra-high-strength concrete, UHPC, pull-out test, research, investigation, configuration, shear stress, experiment, test specimen, slip, finite element method, parameters, geometry, test series , Concrete cover, variation, crack, failure mechanism, bond performance, reinforcing bar, carbon fiber, tensile strength, filigreeability, concrete construction component, load-bearing behavior, concrete composition, concrete, pull-out-test, research, investigation, set-up , shear stress, experiment, test specimen, slippage, finite element method, parameter, geometry, test series, concrete cover, variation, split,
Uniaxial tensile tests on textile-reinforced concretes with inorganically impregnated carbon fibers
Lenting, Martin; Orlowsky, Jeanette
Magazine articles from: Concrete and reinforced concrete construction
Vol .: Vol. 115, No. 7, Fig., Tab., Lit., 2020, pp.495-503, Fig., Tab., Lit.
Tensile test, textile reinforcement, textile concrete, carbon fiber, impregnation, load-bearing capacity, crack pattern, area of application, polymer, temperature stress, research, repair concept, bond strength, investigation, experiment, silica ester, test specimen, fine concrete, vibrating table, testing machine, crack width, suspension, composite material, axial load, tension Dehnungs-Behavior, tension test, textile reinforcement, textile concrete, carbon fiber, bearing capacity, fracture pattern, field of application, polymer, subjection to temperature change, research, Repair concept, bond strength, investigation, experiment, silicate ester, test specimen , fine-grained concrete, vibrating table, testing machine, crack width, suspension, composite material, axial loading,
Resource consumption in global reinforced concrete construction and the potential of carbon concrete construction. Global construction challenges
Seifert, Wiebke; Lieboldt, Matthias
Magazine articles from: Concrete and reinforced concrete construction
Vol .: Vol. 115, No. 6, fig., Tab., Lit., graph. Darst., Längschn., Querschn., 2020, pp.469-478, fig., Tab., Lit., graph. Darst., Longitudinal section, cross section.
Resource consumption, carbon concrete, raw material deposits, concrete consumption, resource conservation, research, composite material, carbon fiber, fiber concrete, cement, aggregate, steel industry, reinforcement, corrosion resistance, energy use, emissions, water demand, carbon dioxide, sustainability, life cycle assessment, life cycle, durability, application example, bridge construction, material saving, Weight, savings, consumption of resources, raw materials deposit, concrete usage, protection of resources, research, composite material, carbon fiber, fiber-reinforced concrete, cement, mineral aggregate, steel industry, reinforcement, corrosion resistance, energy consumption, emission, water requirements, carbon dioxide, sustainability, ecobalance, life cycle, durability, example of application, bridge construction, material saving, weight,
more magazine articles
Knitted reinforcement textiles with carbon fiber-based sensors in a composite material with a mineral matrix
Quadflieg, Till Arne; Gries, Thomas (Ed.)
The aim of the work is to prevent the overdimensioning of structures made of textile-reinforced concrete by means of a performance-related design with condition monitoring and thus to make textile-reinforced concrete more competitive. For this purpose, carbon fibers are made usable as sensor fibers in reinforcement textiles relevant for the application. The approach is to characterize the change in conductivity of the carbon fibers and to evaluate the transfer of the properties in the composite material. For this purpose, the complex system component is first broken down into its production-related sub-steps in order to be able to assign the respective influence on the material behavior of the later application. Finally, the relationship between the behavior at the yarn level and the composite level is established.
Fleece, deformation behavior, strength behavior, tensile strength, bending tensile strength, shear strength, supervision, cost estimation, concrete component, reinforcement, reinforcement, textile reinforcement, fabric, carbon fiber , Property (mechanical), shear behavior, test, suitability, elongation, sensor, functionality, possible use, area of application, concrete construction component, reinforcement, textile reinforcement, tissue, carbon fiber, characteristic (mechanical), shearing behavior, test, suitability, strain, sensor, working principle, utilization feasibility, field of application,
Shaker 2017, 150 p., Fig., Tab., Lit.
To the literature service
For assessing the risk of brittle fracture, perforated steel structures made of mild steel
In the thesis, experimental and computational investigations on the brittle fracture behavior of perforated structures made of old mild steel are presented. The extensive material analyzes to determine the fracture mechanical material toughness in the brittle-ductile transition area according to the master curve concept (ASTM E1921) are an essential part of this. The evaluations show that different material grades can be defined depending on the manufacturing process. In order to assess the influence of punching holes on the brittle fracture behavior of old mild steels, structural investigations and micro hardness measurements are carried out. Based on a comprehensive analysis of typical structural forms of existing structural steelwork, fracture mechanical FE calculations are carried out on connections of angle profiles to determine the toughness requirements. The results of the stress intensity factor obtained in this way are prepared for further use by modifying known solutions from the specialist literature. Based on this, a practical method for assessing the risk of brittle fracture of riveted and screwed components is derived for the construction details examined as part of a fracture mechanical safety analysis. With the help of statistical methods, scatter of the strength and toughness parameters of mild steels are recorded and, after verification through component tests, transferred into a semi-probabilistic verification concept.
Material property, aging, strengthening, toughness, steel structure, steel structure, fracture behavior, connection, fasteners, tensile test, modeling, finite element method, fracture mechanics, proof of safety, material property, aging, consolidation, toughness, steel structure, steel structure, fracture behavior, connection, connection means, tension test, modeling, finite element method, fracture mechanics, safety check, mild steel, material property, notched impact strength, perforation, brittle fracture tendency, brittle fracture behavior, investigation method, angle profile, component test, calculation method, design model, application example, low-carbon steel, material characteristic, toughness, punching, brittle fracture tendency, brittle fracture behavior, investigation method, angle shape, structural testing, calculation method, design model, example of application,
Environmental medical assessment of fine dust pollutant monitoring, physicochemical influencing variables and in vitro toxicity
According to current model calculations, around 3.3 million people worldwide die every year as a result of air pollution, a large part of which can be attributed to long-term exposure to particulate air pollutants. The main reasons for this are diseases of the lungs and the cardiovascular system. But which toxicological mechanisms of action form the basis of the epidemiologically recorded effects and how do particle properties such as composition, size, concentration or meteorological and geographical parameters influence the toxicological potential of fine dust? Combined investigations from standardized sampling, comprehensive chemical analyzes as well as cell-based in vitro screening methods of specific toxicological endpoints, with the help of which a more precise and cause-specific environmental medical assessment is made possible, offer a possible explanation. As a result, they make a significant contribution to the optimization of particulate matter minimization concepts in the context of air pollution control planning. The area of investigation is the city and region of Aachen, which, due to its size and geographical and topographical location, represents a suitable model region for central European pollution.
Air pollution, damage to health, toxicity, evaluation, sampling, air pollution, injury to health, toxicity, evaluation, sampling, air quality, air pollution, air pollutant, fine dust, origin, chemical composition, concentration, distribution, effect, toxicology, legal basis, pollution, metal content, Carbon content, PAH, investigation method, gravimetry, mass spectrometry, chromatography, liquid chromatography, scanning electron microscopy, air quality, air load, airborne pollutant, fine dust, origin, chemical composition, concentration, distribution, effect, toxicology, legal basis, pollutant nuisance, metal content, carbon content, investigation method, gravimetry, mass spectrometry, scanning electron microscopy,
Selbstverlag 2016, 241 p., Fig., Tab., Lit.
Evaluation of CO2 injection processes in geological formations for site screening Online Resource
The focus of the work is on the capture and storage of CO2 in deep geological layers. The CO2 is separated in the exhaust gas flow of e.g. coal, gas or oil powered power plants, piped to the storage site and then pressed into a porous rock layer filled with salt water at least 800 m below the surface. After the injection, the CO2 spreads laterally as a free phase. At the same time it rises due to its much lower density compared to salt water. A certain amount dissolves in the salt water. In order to prevent further ascent, formations with a low-permeability top layer (caprock) are selected for such a project. At this top layer, the CO2 is held back by the penetration pressure that cannot be overcome. However, the surface layer can also have geological weaknesses or can show potential flow paths for the CO2 to escape through human activities, e.g. drilled wells. On the one hand, this causes the risk of the project failing, namely the separation of CO2 from the carbon cycle and the atmosphere for geological periods of time; on the other hand, there is a health risk for people who come into contact with leaked CO2 and the risk of damage to animals and plants and whole ecosystems.
Carbon dioxide, storage, grouting, deposit, location choice, modeling, factor of influence, soil property, permeability, risk analysis, subsoil, salt water, Storage capacity, model (numerical), dimension analysis, impermeability, permeability, sensitivity analysis, subsoil, salt water, storage capacity, model (numerical), dimension analysis, impermeability, permeability, sensitivity analysis,
Self-published 2009, 210 p., Fig., Tab., Lit.
Modeling of biofilm growth and its influence on CO2 and water (two-phase) flow in porous media online resource
Carbon dioxide emissions can be reduced by capturing carbon dioxide from power plant exhaust gases and storing it in deep geological formations. These reservoirs often contain salty water, which is denser than carbon dioxide. A geological surface layer that is as impermeable as possible prevents the lighter carbon dioxide from rising to the surface of the earth. However, e.g. B. in the context of risk studies, possible faults or cracks in this surface layer are considered, which could lead to an escape of carbon dioxide. The top layer near a carbon dioxide injection well is particularly at risk. The high pressure increase during the first injection phase, cement corrosion on the well due to the formation water rich in carbon dioxide and possible damage to the cover layer during the construction of the borehole are possible causes of disturbed cover layers. Bio-barriers could be used to minimize such risks. A biobarrier can consist of a biofilm itself, but also of mineral deposits favored by the biofilm. The thesis deals with the development of a numerical model to simulate the accumulation of microbial biomass in the subsurface. The developed model should be able to simulate the sealing of the damaged geological cover layer of an underground carbon dioxide deposit with the help of biofilms. For this, on the one hand flow processes and on the other hand the microbial activity and the interaction of these processes in porous media must be correctly described. The accumulation of bacteria in a porous medium influences the hydraulic properties of the medium and, as a consequence, the flow within it. In return, the current determines the transport of microbial nutrients and thus also the distribution of microbial growth rates. Accordingly, the correct description of the interaction between flow and microbial processes is e
Carbon dioxide, storage, deposit, porosity, groundwater flow, modeling, carbon dioxide, storage, deposit, porosity, ground-water flow, modeling, top layer, subsoil, sealing, biofilm, nutrient, growth, influence, flow, interaction, model (numerical) , surface layer, subsoil, sealing, biofilm, nutrient, growth, influence, current, interaction, model (numerical),
Self-published 2009, 131 pp., Fig., Tab., Lit.
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