Waste Management & Handling Sorting and Separation Technology


RecyPET AG was established in 1998 and has operated Europe’s first bottle-to-bottle PET recycling plant in Fraunfeld, Switzerland, since September 2000. The PET recycling plant operates in accordance with the URRC technology developed by the United Resource Recovery Corporation (USA) together with Coca-Cola and has an input capacity of approx. 18,000 tonnes per year. Four further plants in Europe now use this technology.


In Switzerland the collected beverage bottles are sorted in five sorting plants according to colour and quality, compressed into balls and delivered


to RecyPET AG, among others, for processing. RecyPET’s goal is to close the material cycle for PET beverage bottles. The recyclate produced is used among other things for the production of new PET beverage bottles, food packing films, other films, etc.


S+S Separation and Sorting Technology (Germany) supplied a metal separator of the type PETMAG to RecyPET as long ago as 2001. The PETMAG


separates metal contaminants of all kinds from PET flakes. Since the flakes are also to be sorted according to colour, S+S, in close cooperation with RecyPET, adapted a colour sorting machine originally used in the glass recycling industry to the requirements of PET recycling. The result was the SPEKTRUM colour separator. By means of double-sided inspection it was possible even to separate flakes contaminated with the slightest glue residues.


In 2010 the PETMAG metal separator, which during its ten years of operation caused service and spare part costs of barely 2000 Euros, was replaced by a combined system of the latest generation, the VARISORT COMPACT. Colour and metal sensors are combined with one another in this device.


The material to be examined is fed by means of specially adapted vibrating trough conveyors and unites the advantages of chutes and belt systems. This also makes it possible for the first time to remove rubber pieces from the material stream that aredifficult to separate using chute technology due to varying friction. The superiority of VARISORT COMPACT over chute systems with channels lies in the fact that the equipment is easy to clean and blockages due to larger flakes can virtually be ruled out. Even in the case of irregular parts or materials with different coefficients of friction, the belt feeding system provides for pinpoint ejection in free fall at the end of the belt, after the material has been classified with the sensors. After evaluation of the relevant information, high-speed valves for the material discharge are activated with an appropriate time delay. By means of powerful compressed air pulses, the particles to be separated are diverted from their original drop parabola into a separate shaft.


In comparison to conventional belt sorting systems, the VARISORT COMPACT sorting system is characterised by a compact design requiring little space. Retrofitting in existing plants and the adoption of


already existing chute devices is easily possible. The use of high-resolution sensors and state-of-the-art signal processing technologies allows high detection accuracy and the analysis of up to 500,000 parts per second. By means of the free-fall inspection, a very precise blow-out procedure can be realised even with high rejection rates. This is made possible by the large number of high-speed valves, which can perform up to 500 switching cycles per second.


For Kornel Büsser, production manager at the Swiss company RecyPET AG, the long-standing cooperation with S+S has proven its value: "The reliability and ease of maintenance of the S+S units convinced us, together with their performance, particularly in the separation of difficult contaminants."


Reader Reply Card No 49


Sustainable More Efficient Decanter Technology The Westfalia Separator® sludgeforce unites ecological demands and economical advantages; it


combines economy and flexibility; it provides for maximum efficiency in operation and makes for a very short pay-back time. The prime achievement is a significant reduction in energy consumption with a specific energy consumption of just 0.7 kWh per cubic metre. The flocculent requirement likewise drops significantly which is equivalent to 25 percent in terms of operating costs for polymer consumption.


The sludgeforce from GEA Westfalia Separator (Germany) similarly lowers the


investment costs because the operators now achieve throughputs with small decanters which were previously only possible with larger-scale models. Moreover, GEA Westfalia Separator has succeeded to further minimise the space and maintenance requirement for the installation due to a special design.


The Sum of All Drives


GEA Westfalia Separator has not least managed to largely standardise the entire series by means of standardisation and modularisation. This applies both for the design, the functional principle, the connections, the operating mode as well as the drive concept. All models of the Westfalia Separator®


sludgeforce series will in future feature the unique Westfalia Separator® summationdrive, a drive concept


developed by GEA Westfalia Separator. This high-torque drive reliably provides the optimum differential speed for the process. Only the power is supplied which is actually required. An intelligent kinematics system "adds" the power generated by the two motors and then transmits the power precisely to the bowl and scroll.


Unnecessary conversion losses, which for instance in other backdrive solutions have been eliminated in the Westfalia Separator®


summationdrive. Instead, the differential speed is made available smoothly in a wide range in an energy-efficient manner. Overall, with its various models, the new Westfalia Separator®


sludgeforce decanter generation covers ranges from 1 to 200 cubic metres per hour. Reader Reply Card No 51


Mixing of Slurry in Biogas Plants


Shredding Technology Now on the Internet


More information, quicker facts, easy data download: the new internet presence of shredding technology from UNTHA (Austria) has gone live.


The new design and website has a straightforward layout is user- friendly and offers a multitude of new features. All important information regarding shredding technology is now available in a very structured form. With just a few clicks, you can navigate to the topics of interest. A special highlight is our new welcome page which offers direct and target group-oriented access to particularly important contents. Our internet presence complies with current internet standards and additionally offers interfaces with social networks and the popular video hosting website YouTube on which you can watch the popular UNTHA Powershow in even better quality.


For now, the website is available in German and English. By the


end of this year, we will provide versions in French, Italian and Spanish. "The re-launch of our website has become imperative due to the new positioning of the UNTHA brand," explains Christoph


Walchhofer, Head of Marketing of UNTHA shredding technology. "The new internet presence continues to provide a great depth of information. On more than 80 well-structured pages, we show virtually everything that makes UNTHA shredding technology the reliable brand in shredding technology."


Reader Reply Card No 52


Submersible motor mixers from Bauer (Austria) are designed for high efficiency and engineered using high quality durable materials. The internal design elements, motors and propeller shaft are on the same axis level, and guarantee an efficient homogenisation of the substrate. In the planetary gearbox, several hardened and polished interlocking gears operate simultaneously, friction is reduced and there’s less power consumption. The large diameter twin-blade stainless steel thrust propeller has a special thrust pitch which results in higher efficiency.


Due to a cleverly devised oil-feed system, thorough lubrication of the gears is guarantees at operating angles of +/-30°.


Based on these characteristics, Bauer offers with MSXH


several models especially modified for use in biogas plants. For additional safety, the biogas model submersible motor mixers are equipped with level probes that guarantee an immediate safety shut off when the equipment is installed. It’s also important that the walls and roof are gas tight. The mounting kits are height adjustable and the operation of the mixer is external. Enhanced and safe mixing of slurry in the biogas plant is guaranteed.


Reader Reply Card No 53


Innovative, Efficient Waste Management


As the only operator active across all segments of the waste management business (solid, liquid, hazardous and non- hazardous waste), Veolia Environmental Services (France) is contributing to a better environment by providing its municipal and industrial clients with innovative, efficient waste management, spanning collection, site remediation, industrial services, treatment, and recovery and recycling solutions.


Veolia’s activities include Environmental and flow logistics services, including cleaning, site remediation, collection, consolidation and transfer, for local authorities and businesses; Sorting and treatment of hazardous and non-hazardous waste; treatment includes incineration, composting, landfilling and physicochemical treatment; and Conversion of organic waste and recycled raw materials to energy.


Reader Reply Card No 50


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www.pollutionsolutions-online.com • Annual Buyers’ Guide 2011


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