CASE STORY The sewage sludge of 6 waste water treatment plants in the city of Shen Zhen will be mechanically dewatered and supplied to the plant of BaoAn for partial drying and burning. More than 800t digested sludge per day will be dried in four indirect heated Rotadisc®-disc dryers from 20% to 36% DS content. Afterwards it will be incinerated thermally self- sufficient. The energy for drying is won from the exhaust gas stream of the two

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