Sewage sludge

Generally

Safe disposal of sewage sludge from wastewater treatment is an urgent problem that is associated with increasing environmental requirements and costs that continue to rise. Sewage sludge drying is becoming increasingly important and requires technically efficient and economical systems.
With our SpeedRotation STR dryer series, we provide a dryer system that revolutionizes sewage sludge drying. With only 700W of thermal energy for the evaporation of 1 liter of water, we have reached the limit of what is physically possible with our system.
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Sewage sludge drying

This is possible because our speed rotary dryer creates the ideal physical conditions necessary for the highest possible efficiency. Wet sewage sludge is mixed to a value below the gluing limit via a dry backmix and fed into the drying chamber. Rapidly rotating throwing blades keep the sewage sludge in a cloud of material in the drying chamber.
Schnell rotierende Wurfschaufeln halten den Klärschlamm ständig in einer Materialwolke in der Trocknungskammer. Mit diesem Verfahren wird die maximale Oberfläche für das Produkt geschaffen, In die Materialwolke wird heißes Abgas mit ca. 300°C geblasen. Die hohe Thermokinetik führt dabei zu einer Turbotrocknung. Der Klärschlamm wird binnen weniger Minuten von vormals 75% Feuchtigkeit auf eine Restfeuchte von 10% getrocknet. Der Materialdurchlauf regelt sich vollautomatisch und passt sich auch Schwankungen im Rohmaterial oder in der Energiezufuhr selbständig an.
The exhaust gas from a CHP, a micro gas turbine, pyrolysis, sewage sludge incineration, gas burners or a biomass burner can be used to provide the thermal energy. Several exhaust gas sources can also be used at the same time to ensure the cheapest energy supply on site.
Dried sewage sludge is dusty and hazardous to health. The drying process is therefore immediately followed by pelleting, which presses the sewage sludge into an almost dust-free pellet. The pelleted sewage sludge can be stored, transported with any logistics and used for further processes.
Dried sewage sludge is dusty and hazardous to health. The drying process is therefore immediately followed by pelleting, which presses the sewage sludge into an almost dust-free pellet. The pelleted sewage sludge can be stored, transported with any logistics and used for further processes.