Apparatus for treating a confined liquid by means of a pulse electrical discharge

A vessel having a liquid treatment region for use with a plasma established therein, said vessel comprising:

• a) a reflector section having a curved inner surface defining a portion of the liquid treatment region;
• b) a concentrator section adjoined said reflector section to form a unitary vessel and having an inner wall surface extending from the curved inner surface of the reflector section and a base surface to bound the liquid treatment region;
• c) a tapered deflector centrally located and projecting from the base surface of the concentrator section and spaced from the inner wall surface thereof, said deflector constructed and arranged for continuously decreasing the cross-sectional area of the liquid treatment region along the length of its projecting with increasing distance from the reflector section;
• d) input and output ports located in said vessel and communicating with the liquid treatment region;
• and
• e) means for providing a pulsed electrical discharge in the liquid treatment region.