Electrodialysis device

An electrodialysis device, comprising in combination:

• an anode compartment;
• a compartment containing a stack of electrodialysis membranes;
• a cathode compartment;
• conduits between said anode and said cathode compartments;
• and
• circulating means for circulating a slurry between said anode and said cathode compartments, said circulating means comprising a bubble lift.

An electrodialysis device, comprising in combination:

• an anode compartment;
• a compartment containing a stack of electrodialysis membranes;
• a cathode compartment;
• conduits between said anode and said cathode compartments;
• circulating means for circulating a slurry between said anode and said cathode compartments;
• and
• insert means in each of said anode and said cathode compartments for defining a constrictive outlet at the lower part of said insert means, thus establishing a concentration gradient in the slurry, with a higher concentration of the particles at the lower part of said anode and said cathode compartments.

An electrodialysis device, comprising in combination:

• an anode compartment;
• a compartment containing a stack of electrodialysis membranes;
• a cathode compartment;
• conduits between said anode and said cathode compartments;
• a slurry within the device comprising at least 5% by weight of a fine carbon powder in an electrolyte containing at least 2% by weight of sodium chloride;
• and
• circulating means for circulating said slurry between said anode and said cathode compartments.

An electrodialysis device, comprising in combination:

• an anode compartment;
• a compartment containing a stack of electrodyalysis membranes;
• a cathode compartment;
• conduits between said anode and said cathode compartments;
• a slurry within the device comprising at least 1% by weight of a fine carbon powder in combination with at least 1% of fine particles of ion exchange resin, in an electrolyte;
• and
• circulating means for circulating said slurry between said anode and said cathode compartments.