CONTINUOUS ELECTROFLOTATION OF O W EMULSI ON BY USE OF ROTARY, ANNULAR-TYPE SACRIFICIAL ELECTRODES/

A novel electroflotation method using rotary, annular-type sacrificial electrodes was developed to study the efficiency of O/W emulsion remo val. It was found that the oil removal efficiency increased with incre asing electric current density and the average residence time of the l iquid. The efficiency reached a constant value at a high rotational sp eed of the inner cylinder. This was because loose flocs were broken up in the range of high rotational speed by turbulence in the intercylin der gap. Modeling of the separation process was based on the assumptio n that the removal of oil was due to the flocculation-breakup process between oil droplets and micro-bubbles.