WASTEWATER TREATMENT APPARATUS AND WASTEWATER TREATMENT METHOD FOR CONTROLLING CONCENTRATION OF DISSOLVED OXYGEN AUTOMATICALLY ACCORDING TO OXIDATION-REDUCTION POTENTIAL

摘要

The present invention is a biological wastewater treatment method, the control unit 19, the optimum ORP (Oxygen-Reduction Potential; hereinafter referred to as 'ORP') maximum value (hereinafter referred to as 'R _TH ') and the appropriate DO (Dissolved Oxygen; below) , 'DO' term) density value (hereinafter, 'D _TH' input step of inputting a quot;); A reading step of reading an ORP maximum value (hereinafter referred to as 'R _EX ') during the aeration process; If R _EX is greater than the preset R _TH by comparing R _EX with the preset R _TH , the appropriate DO concentration value in the abandonment process of the subsequent cycle is set to a value smaller than the appropriate DO concentration value in the previous cycle, and R _EX A control step of setting an appropriate DO concentration value at the time of abandonment of a subsequent cycle to a value greater than an appropriate DO concentration value of a previous cycle if less than the set R _TH ; And performing a step of abandoning the subsequent cycle so that the DO concentration value in the reaction tank 10 has the appropriate DO concentration value set in the control step during the abandonment process of the subsequent cycle. Provide sewage treatment method.;Wastewater Treatment System, Reactor, ORP, DO, BOD (Biochemical Oxygen Demand)