Process and device for the aerobic-thermophilic stabilization and disinfection of sludge

Abstract From the Canadian patent

1. A process for the stabilization and disinfection of sludge wherein a) raw sludge having a dry matter content of from 3 to 7 % by weight is fed continuously or quasi-continuously into a first stage where it , remains for an average retention time of three to ten days under aerobic-thermophilic conditions to obtain a partially stabilized sludge;, b) said partially stabilized sludge is fed into a second stage in which disinfection of the partially stabilized sludge is effected at temperatures of at least 50 °C, wherein prior to discharging there is , no charging until said partially stabilized sludge has been disinfected.