CASE STORY The sewage sludge of a waste water treatment plant in the city of Lodz will be mechanically dewatered and supplied for partial drying and incineration. 231 t digested sludge per day will be dried in two indirect heated Rotadisc®-disc dryers from 22% to 32% DS-content. Afterwards it will be incinerated thermally self- sufficiently. The energy for drying is won from the exhaust gas stream of the fluidised bed incinerators without

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