The invention relates to a process for converting {HEAD ~ sewage sludge filter cakes} into {TAIL ~ oil}, gas and coke by pyrolysis, wherein the filter cakes, still containing water, are comminuted, then largely dewatered by evaporation with the supply of heat formed at least partially by waste heat from at least one subsequent process step, then converted, while being circulated and conveyed and degassed and with the simultaneous supply of heat formed at least partially by waste heat from at least one subsequent process step, and afterwards cooled with recovery of heat 
The invention relates to a process for converting { HEAD ~ sewage sludge filter cakes } into { TAIL ~ oil } , gas and coke by pyrolysis , wherein the filter cakes , still containing water , are comminuted , then largely dewatered by evaporation with the supply of heat formed at least partially by waste heat from at least one subsequent process step , then converted , while being circulated and conveyed and degassed and with the simultaneous supply of heat formed at least partially by waste heat from at least one subsequent process step , and afterwards cooled with recovery of heat
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