Solare Klärschlammtrocknung in der Praxis - Erfahrungen auf der Kläranlage Glarnerland

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The water purification plant Glarnerland produces yearly roughly 4 000 tons of digested sludge (DM 25 %).

Through drying, partially using in agriculture and the rest burning in the county's waste incineration plant the final disposal of the sludge is solved. The new solar sludge drying plant uses solar energy and waste heat taken from the electrothermal power station. In the new solar drying plant the digested sludge is partially predried in two greenhouses from a dry mass content of 25 % to 40-50 %. After only one year in operation, it was shown that in the solar plant not only 1 600 tons of water were evaporated, but also that the purification plant's waste heat recovery was efficient. The amount of transports by road was reduced by 40 % and a large overall reduction in disposal costs was achieved.

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