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FNE Forschungsinstitut für Nichteisen-Metalle GmbH has developed a thermal treatment process for kieselguhr and tested it together with Freiberger Brauhaus AG. The process itself is characterised by low running costs and complete utilisation of the recovered kieselguhr. The suitability of recycled kieselguhr for commercial operations has been proven in two extensive test series.

At consumption rates of an average of 150 g of kieselguhr/hl of unfiltered beer, about 72,000 tonnes of brewery kieselguhr slurry arise in Germany every year. Disposal of this costs money. As a rule, disposal is through utilisation in agriculture as a soil aggregate and a plant nutrient. A regenerated kiesel-guhr is produced which can be used again in beer filtration.
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