Gunther Krieg founded UNISENSOR Sensorsysteme as a spin-off of the Research Center Karlsruhe (now: Karlsruhe Institute of Technology, KIT) and the University of Applied Sciences Karlsruhe. The new process, however, achieves such a high grade of purity that the recycled material can be 100% reused to produce in juice, beer, soft drink, or mineral water bottles without any risk to consumers. The rest was used, for example, to manufacture clothing or tarpaulins. Consequently, in the past, only part of the recycled PET found its way back into food-grade bottles. In conventional methods, however, many impurities and contaminants were unable to be identified and removed. To reduce demand for petroleum – the starting material in PET bottles – empty bottles are collection and recycled. In Germany, almost 70 percent of all light-weight non-recyclable bottles are manufactured for mineral water – and the trend is rising. Every year manufacturers process around seven million tons of PET. More and more beverages around the world are being bottled in non-recyclable PET bottles.
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