Ultrasonic sludge pretreatment under pressure.

  title={Ultrasonic sludge pretreatment under pressure.},
  author={Tuan Ngoc Le and Carine Julcour-Lebigue and H. Laurichesse Delmas},
  journal={Ultrasonics sonochemistry},
  volume={20 5},
The objective of this work was to optimize the ultrasound (US) pretreatment of sludge. Three types of sewage sludge were examined: mixed, secondary and secondary after partial methanisation ("digested" sludge). Thereby, several main process parameters were varied separately or simultaneously: stirrer speed, total solid content of sludge (TS), thermal operating conditions (adiabatic vs. isothermal), ultrasonic power input (PUS), specific energy input (ES), and for the first time external… CONTINUE READING