Venturi design and system employing such for dosing use in water treatment

A system for delivery of one or more products to a body of water for treating and/or disinfecting the body of water, the system comprising:

• (i) a water inlet;
• (ii) an ozonator comprising an air inlet with an oxygen separator membrane attached to the air inlet, wherein the oxygen separator member prevents passage of some nitrogen into the ozonator and is therefore a nitrogen filter;
• (iii) a venturi, wherein the venturi is associated with a chamber at the outlet of the venturi, and where the diameter of the outlet of the venturi is substantially larger than the diameter of the inlet of the venturi;
• (iv) an electrolyser;
• and
• (v) a water outlet,
• wherein the ozonator is in gaseous communication with the venturi, such that ozone generated in the ozonator is introduced into water as the water passes into the venturi,
• wherein a stream of water simultaneously passes through the electrolyser,
• wherein the static pressure of the water in the chamber at the outlet of the venturi is high, leading to an increase in the solubility of ozone in the water;
• and
• wherein the resultant ozonated water and electrolyzed water combine to form a single stream that exits the system via the water outlet.