FIELD: electrochemical industry. SUBSTANCE: method involves measuring pH and redox potential values of clear water; generating signal proportional to product of two measured values; generating regulator setting signal; comparing it with predetermined product value; generating error signal on the base of comparison results and regulating flow rate of industrial sewage through cleaning apparatus by means of actuating device in accordance with error value by experimentally established dependence; introducing into regulator adjustable dead zone determined by solving the expression recited in Specifications. EFFECT: increased efficiency and improved quality of water. 2 cl, 2 dwg
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