scholarly journals Solidification of hazardous waste as a part of the raw material recovery process

2017 ◽  
Vol 18 ◽  
pp. 01026
Author(s):  
Daria Polek
Keyword(s):  
Hazardous Waste ◽  
Recovery Process ◽  
Raw Material ◽  
Material Recovery

Solidification of hazardous waste as a part of the raw material recovery process

2017 ◽  
Vol 18 ◽  
pp. 01026
Author(s):  
Daria Polek
Keyword(s):  
Comparative Analysis ◽  
Hazardous Waste ◽  
Market Research ◽  
Leading Edge ◽  
Recovery Process ◽  
Raw Material ◽  
Material Recovery ◽  
Comparative Model

Paper presents the process capabilities for solidification hazardous waste. In the first part of the article the authors present general technologies and methods in a comparative model. The following section describes the results of market research for the most advanced and innovative solidification technologies. Comparative analysis of the material has shown and described the three most promising, leading-edge technologies of waste solidification avalible on the Polish market.

scholarly journals Study of the Physical Behavior of a New Composite Material Based on Fly Ash from the Combustion of Coal in an Ultra-Supercritical Thermal Power Plant

2021 ◽  
Vol 5 (6) ◽  
pp. 151
Author(s):  
Mustapha El Kanzaoui ◽  
Chouaib Ennawaoui ◽  
Saleh Eladaoui ◽  
Abdelowahed Hajjaji ◽  
Abdellah Guenbour ◽  
...  
Keyword(s):  
Composite Material ◽  
Fly Ash ◽  
Power Plant ◽  
High Performance ◽  
Thermal Power ◽  
Recovery Process ◽  
Industrial Wastes ◽  
Raw Material ◽  
Polymerization Reaction ◽  
High Performance Composite

Given the amount of industrial waste produced and collected in the world today, a recycling and recovery process is needed. The study carried out on this subject focuses on the valorization of one of these industrial wastes, namely the fly ash produced by an ultra-supercritical coal power plant. This paper describes the use and recovery of fly ash as a high percentage reinforcement for the development of a new high-performance composite material for use in various fields. The raw material, fly ash, comes from the staged combustion of coal, which occurs in the furnace of an ultra-supercritical boiler of a coal-fired power plant. Mechanical compression, thermal conductivity, and erosion tests are used to study the mechanical, thermal, and erosion behavior of this new composite material. The mineralogical and textural analyses of samples were characterized using Scanning Electron Microscopy (SEM). SEM confirmed the formation of a new composite by a polymerization reaction. The results obtained are very remarkable, with a high Young’s modulus and a criterion of insulation, which approves the presence of a potential to be exploited in the different fields of materials. In conclusion, the composite material presented in this study has great potential for building material and could represent interesting candidates for the smart city.

A Heuristic Approach for Disassembly Sequencing Problem for Robotic Disassembly Operations

2012 ◽  
pp. 438-447
Author(s):  
Ahmed ElSayed ◽  
Elif A. Kongar ◽  
Surendra M. Gupta
Keyword(s):  
Genetic Algorithm ◽  
Value Added ◽  
Recovery Process ◽  
Electronic Products ◽  
Sequencing Problem ◽  
Material Recovery ◽  
Disassembly Sequence ◽  
Robotic Disassembly ◽  
Efficient Recovery ◽  
Disassembly Sequencing

Electronic products enter the waste stream rapidly due to technological enhancements. Their parts and material recovery involve significant economic and environmental gain. To regain the value added to such products a certain level of disassembly may be required. Disassembly operations are often expensive and the complexity of determining the best disassembly sequence increases as the number of parts in a product grows. Therefore, it is necessary to develop methodologies for obtaining optimal or near optimal disassembly sequences to ensure efficient recovery process. To that end, this chapter introduces a Genetic Algorithm based methodology to develop disassembly sequencing for end-of-life products. A numerical example is presented to provide and demonstrate better understating and functionality of the algorithm.

scholarly journals Innovative applications of waste cooking oil as raw material

2019 ◽  
Vol 102 (2) ◽  
pp. 153-160 ◽  
Author(s):  
Alberto Mannu ◽  
Monica Ferro ◽  
Maria Enrica Di Pietro ◽  
Andrea Mele
Keyword(s):  
Hazardous Waste ◽  
Industrial Application ◽  
Waste Cooking Oil ◽  
Review Article ◽  
Raw Material ◽  
Cooking Oil ◽  
Waste Cooking Oils ◽  
Cooking Oils ◽  
Recycled Waste

The consideration towards waste cooking oils is changing from hazardous waste to valuable raw material for industrial application. During the last 5 years, some innovative processes based on the employment of recycled waste cooking oil have appeared in the literature. In this review article, the most recent and innovative applications of recycled waste cooking oil are reported and discussed. These include the production of bioplasticizers, the application of chemicals derived from waste cooking oils as energy vectors and the use of waste cooking oils as a solvent for pollutant agents.

Tendencies and Overview on the Nutrient Recovery from Sewage Sludge in Germany

2008 ◽  
Vol 3 (1) ◽  
Author(s):  
Alexander Weidelener ◽  
Demet Antakyalı ◽  
Jörg Krampe
Keyword(s):  
Land Use ◽  
Sewage Sludge ◽  
Current Situation ◽  
Raw Material ◽  
Nutrient Recovery ◽  
Research Institutions ◽  
Material Recovery ◽  
Conventional Production ◽  
Fertiliser Use

The critics against the land use of sewage sludge in Germany lead the research institutions to investigate methods for nutrient recovery. Current research proved that the nutrients such as nitrogen or phosphorus can be recovered. Though, the costs still must be reduced to compete with the conventional production using fresh raw material. Recovery products are not listed in current legislations concerning fertiliser use, therefore the land use of the recovered products require some legislative replenishments. The paper portrays the current situation concerning the above discussions with an overview on the actual recovery technologies

Effects of Nickel on Properties of Cement Mortar Derived from the Co-Burning of Industrial Waste and its Leaching Behavior

2015 ◽  
Vol 1103 ◽  
pp. 121-127
Author(s):  
Suthatip Sinyoung ◽  
Ekkachai Taweekitwanit ◽  
Puangrat Kajitvichyanukul
Keyword(s):  
Hazardous Waste ◽  
Alternative Fuels ◽  
New Technology ◽  
Xrd Analysis ◽  
Raw Material ◽  
Cement Kiln ◽  
Leaching Behavior ◽  
Free Lime ◽  
Leach Test ◽  
Alternative Material

Burning of hazardous waste in cement kiln is the new technology based on waste derived and alternative fuels. Besides being the alternative way to destroy hazardous waste, this method provides alternative material as raw material or the fuel in the cement production process. This disposal method can be applied if the contaminant either does not appear in the emission or leach from cement to environment. This work focused on properties and the leaching behavior of nickel from cement. The resulting clinker was analyzed for the content of free lime and X-ray diffraction (XRD) analysis was done. The identification of MgNiO2 peaks in XRD pattern was found in all clinkers with nickel addition in the range of 0.5-2.0 wt.%. Results obtained from this part suggested that nickel incorporated in the clinker phase and may combine with magnesium to form the new compound as MgNiO2 during the burning process. To study the leaching behavior, M3051A, NEN:7341 and pH static leach test were used. Results showed that approximately 3% of nickel can be leached to environment. From the pH static leach test, nickel was effectively leached at pH 4 and the reachability of its decreased when the pH increased. In this work, Toxicity characteristic leaching procedure (TCLP) was also used to identify the cement as hazardous waste or non-hazardous waste. The results showed that raw material doped with nickel up to 2 wt.%, the cement was not classified as hazardous waste.

Steam Pyrolysis of Polyimides: Effects of Steam on Raw Material Recovery

2015 ◽  
Vol 49 (22) ◽  
pp. 13558-13565 ◽  
Author(s):  
Shogo Kumagai ◽  
Tomoyuki Hosaka ◽  
Tomohito Kameda ◽  
Toshiaki Yoshioka
Keyword(s):  
Raw Material ◽  
Material Recovery

Potential Contribution of Secondary Materials to Overall Supply - The Example of the European Cobalt Cycle

2019 ◽  
Vol 959 ◽  
pp. 11-21
Author(s):  
Simon Glöser-Chahoud ◽  
Frank Schultmann
Keyword(s):  
Lithium Ion ◽  
Electronic Equipment ◽  
Raw Material ◽  
Potential Contribution ◽  
Material Recycling ◽  
Material Recovery ◽  
Current State ◽  
Battery Packs ◽  
Supply Risks ◽  
Secondary Materials

Higher efficiency in raw material recycling is discussed as a key strategy to decrease the environmental impact of resource consumption and to improve materials’ availability in order to mitigate supply risks. However, particularly in the case of technology metals, demand is driven by specific emerging technologies from which recycling will not be possible before the end of their useful lifetimes. Hence, the availability of secondary materials is limited by the amount of obsolete products as well as their collection, separation and treatment during waste management and recycling. In this paper, we present the results of a dynamic material flow model for cobalt as a key raw material for lithium-ion batteries at an European level (EU28). This model aims at quantifying the current state of recycling and future recycling potentials from end-of-life (EoL) product flows. While it is expectable that obsolete large battery packs from (hybrid) electric vehicles will be efficiently collected in future, EoL Li-ion battery flows will remain dominated by smaller electronic equipment (smartphones, laptops etc.) in the coming years and the model results show a significant potential for improvements in collection and material recovery from EoL batteries in Europe. A major challenge will be the collection of smaller batteries and Waste Electrical and Electronic Equipment (WEEE) in general from which a significant share of total European cobalt demand could be recovered in the coming years.

Analysis on adsorbent for spent solvent treatment by micro-PIXE and EXAFS

2021 ◽  
pp. 1950012
Author(s):  
Y. Arai ◽  
S. Watanabe ◽  
S. Ohno ◽  
M. Nakamura ◽  
A. Shibata ◽  
...  
Keyword(s):  
Material Removal ◽  
Graft Polymerization ◽  
Spent Nuclear Fuel ◽  
Iminodiacetic Acid ◽  
Recovery Process ◽  
Nuclear Material ◽  
Pixe Analysis ◽  
X Ray ◽  
Material Recovery ◽  
X Ray Absorption

The spent PUREX solvent containing U and Pu is generated from the reprocessing process of spent nuclear fuel. The nuclear material removal is important for the safe storage or disposal of the spent solvent. Our previous study revealed that the adsorbent with the iminodiacetic acid (IDA) functional group is one of the most promising materials for designing the nuclear material recovery process. Accordingly, an IDA-type adsorbent was synthesized by using graft polymerization technology or a chemical reaction to improve the adsorption rate and capacity. The synthesized IDA-type adsorbent was characterized by micro particle-induced X-ray emission (PIXE) and extended X-ray absorption fine structure (EXAFS) analyses. The micro-PIXE analysis revealed that Zr was adsorbed on the whole synthesized adsorbents and quantified the microamount of adsorbed Zr. Moreover, EXAFS suggested that Zr in the aqueous solution and solvent can be trapped by the IDA group with different mechanisms.

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