Recovery of critical resources from production waste of the specialised glass industry by gas-phase reaction
© Wasteconsult International (5/2017)
Glasses from the optical specialised glass industry often contain considerable amounts of rare earth elements (REE) like Lanthanum and Yttrium. These are usually bound in the shape of a silicate matrix. Despite a selective mechanical treatment an additional chemical treatment, is necessary to selectively separate such elements from the matrix.

Wrong Tracks in Waste Management
© TK Verlag - Fachverlag fĂĽr Kreislaufwirtschaft (9/2016)
Waste Management is ubiquitous in our everyday life. Economic prosperity and the abundance of materialistic goods imply the generation of waste. In parallel the public awareness for environmentally sound solutions in the field of waste management is raising. This context imposes challenging conditions for political leaders. Often politicians are confronted to take decisions about concepts or investments in waste management without independent expertise. They are approached by vendors of waste treatment technologies or concepts, claiming high environmental and energetic performance, combined with profitable cost – benefit rates.

Fully Automated Sorting Plant for Municipal Solid Waste in Oslo with Recovery of Metals, Plastics, Paper and Refuse Derived Fuel
© TK Verlag - Fachverlag fĂĽr Kreislaufwirtschaft (9/2016)
In order to treat household waste Romerike Avfallsforedling (ROAF) located in Skedsmorkorset north of Oslo, Norway required the installation of a mechanical Treatment facility to process 40,000 tpa. Together with a Norwegian based technical consultancy Mepex and German based technical consultancy EUG the project was tendered and the plant build against a technical specification. In 2013 the project was awarded to Stadler Anlagenbau and since April 2014 the plant is in operation with an hourly throughput of thirty tons. The input waste contains specific green coloured bags containing food waste which is collected together with the residual waste from the households. The process recovers successfully the green food bags before the remaining waste is mechanically pre-treated and screened to isolate a polymer rich fraction which is then fully segregated via NIR technology in to target polymers prior to fully automated product baling. Recoverable Fibre is optically targeted as well as ferrous and non-ferrous metals. All food waste is transported off site for further biological treatment and the remaining residual waste leaves site for thermal recovery. In 2015 the plant has been successfully upgraded to forty tons per hour and remains fully automated including material baling.

Life History of the Leoben Waste Landfill Site - Twentyfive Years of Operation – Hundred Years of Sustainability
© Lehrstuhl fĂĽr Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2014)
During the first half of the 20th century, several different dumping sites, distributed in two different town districts of Leoben, were used for the disposal of collected municipal solid waste.

Tailings of Mining and Processing as Alternative Raw Material Repository
© Lehrstuhl fĂĽr Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2014)
European political initiatives like for example Horizon 2020, the European Innovation Partnership (EIP) on raw materials, the Knowledge and Innovation Community (KIC) for raw materials, and the European Technology Platform on Sustainable Mineral Resources (ETP SMR) show the vital importance of a secure raw material supply to our industry.

Former Tannery Waste Disposal Site – Excavation of Intense Odour Waste
© Lehrstuhl fĂĽr Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2014)
The contaminated site ST19 (Gerbereideponie Schmidt), a former tannery waste disposal site, is situated in the southern part of the city of Weiz (Styria, Austria). The area is split up into two parts by a main road passing the landfill.

Recycling of REE-Containing Polishing Sludge
© Lehrstuhl fĂĽr Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2014)
Polishing agents containing high amounts of cerium oxides and lanthanum oxides are used during the production process of Swarovski Crystal items, since polishing of the cut and grind-ed surfaces is the fi nal step required to achieve the characteristic radiance and brilliance. Currently, the amount of these REE oxides used annually is up to 300 tons. Before the start of this recycling Project in 2011, the used REE oxides were deposited alongside other production slurries, since their price on the world market was relatively low and recycling was not feasible for various reasons.

Recovery of Metals from Sewage Sludges and Incineration Ashes by Means of Hyperaccumulating Plants
© Lehrstuhl fĂĽr Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2014)
Sewage sludges as well as ashes from waste incineration plants are known accumulation sinks of many elements that are either important nutrients for biological organisms (phosphorus, potassium, magnesium, etc.) or valuable metals when considered on their own in pure form (nickel, chrome, zinc, etc.); they are also serious pollutants when they occur in wild mixtures at localized anthropogenic end-of-stream points.

Basics and Recommendations for a Bavarian Phosphorus Strategy
© Lehrstuhl fĂĽr Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2014)
Phosphorus is an essential and geologically limited resource which is not substitutable in its main applications. Besides its main use as fertilizer phosphorus chemicals are also used in food, animal feed and detergent production. Bavaria has no natural phosphate commodities, therefore it is dependent on imports.

Efficient Re-Use of Tunnel Excavation Material by Using New Technologies
© Lehrstuhl fĂĽr Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2014)
Watching the upcoming underground projects within the European region, more than 800 Million tons of material will be excavated for the construction of underground infrastructures such as railway and road tunnels, metros and power plants in the predictable future.

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