Low risk chlorine dioxide onsite generation system

A method of treating process water, comprising:

• feeding a first solution comprising an acid through a first feed line into a mixing device;
• feeding a second solution comprising chlorate and hydrogen peroxide through a second feed line into the mixing device;
• mixing the first solution and the second solution in the mixing device to form a reaction mixture, wherein the mixing device is connected to a reactor;
• feeding the reaction mixture into the reactor;
• reacting the acid, the chlorate, and the hydrogen peroxide to produce chlorine dioxide in the reactor, wherein the reactor comprises a proximal portion connected to the mixing device and a distal portion in fluid communication with a motive water line, wherein the mixing device, the reactor, a portion of the first feed line, and a portion of the second feed line are positioned within the motive water line;
• mixing the chlorine dioxide with motive water in the motive water line at the distal portion of the reactor;
• and
• injecting the chlorine dioxide and the motive water into the process water.