APPARATUS FOR ELECTROCHEMICAL PURIFICATION OF CONTAMINATED LIQUIDS

An apparatus for electrochemical purification of contaminated liquids comprises a settling chamber having outlet pipes for discharging purified liquid and waste and communicating with an electrocoagulation chamber arranged in said settling chamber and comprising in its bottom portion a system of soluble electrodes. An inlet pipe is provided for feeding contaminated liquid into the electrocoagulation chamber above the soluble electrodes. An inlet pipe is also provided for feeding an electrolyte into the electrocoagulation chamber and a device is provided for removing foam from the apparatus as liquid is discharged into the coagulation chamber into the settling chamber. The foam-removing device has a pipeline for transferring foam outside the settling chamber and is provided with a bell shaped opening at one end thereof and having the other end communicating with the outlet pipe for discharging waste. The pipeline for transferring foam is rotatable in a horizontal plane, and the bell shaped opening is arranged substantially above the settling chamber. This pipeline is provided with an air injector for drawing foam into the bell shaped opening and transferring it through the pipeline to the open end thereof. The invention makes it possible to enhance the efficiency of the apparatus and to improve the stability of the purification process.