ODOUR AND EMISSIONS | TECHNOLOGY
juice bottles and caps, meat trays, disposable tableware and cutlery. The Starlinger process consists of three key steps — material preparation, degassing, and post-treatment of the pellets — and is said to be capable of eliminating even deeply-embedded odours. “Compared to methods which merely bind odours through the use of additives and thereby enclose them in the final pellet, the Starlinger process removes the foreign substances that cause the smell and delivers permanently smell-improved pellets,” the company claims. The machine concept comprises a RecoSTAR
recycling line with C-VAC module combined with downstream odour reduction equipment. The company says the technology can process various polymer types. Machine setup may vary individually depending on the plastic, the source, type, and intensity of the odour as well as on the require- ments on the end product. Germany’s Coperion has been offering various technology solutions to efficiently remove unpleas- ant odours from recycled plastics for some time, including solutions for deodorisation of bulk materials downstream of the extrusion process. The
company has now developed a mobile unit for performing deodorisation tests at the customer’s site, allowing extensive tests to be carried out on freshly-produced material under real production conditions. “There is no need to spend a great deal of time
and effort on reproducing a production set-up in Coperion’s Test Center,” says Thomas Weischer, Head of Sales LSTK Plants, Plastics Processors & Compounders, at Coperion. “The Coperion mobile deodorisation test unit can be integrated into real production. The customer thus obtains the test results in the fastest possible way, and without loss of quality.” Coperion uses the mobile deodorisation unit to determine the optimum odour reduction param- eters required to achieve the result the customer requires. The equipment allows both the degassing medium — air, steam, wet air with high moisture — and the temperature to be varied to achieve the most effective odour removal. Deodorisation temperatures of up to 150°C are possible. Product samples can be taken from the mobile test unit during the odour reduction, allowing the customer to analyse the samples directly in their
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