| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a wastewater treatment facility, by which excellent biological nitrification and denitrification treatment results can be obtained even when a material, such as oil decreasing dissolved oxygen is mixed in a wastewater. SOLUTION: In this wastewater treatment facility, a treatment tank 1, into which the wastewater is intermittently introduced, is installed, and while supplying air into the treatment tank 1 with an air supply means 2, the wastewater in the treatment tank 1 is subjected to the biological nitrification and denitrification treatment. The wastewater treatment facility is provided with a pH detection means 3 and an ORP (oxidation-reduction potential) detection means 4, which detect the pH and ORP of the wastewater in the treatment tank 1 respectively, and a control means 5, 6, which calculates variations in the pH and ORP during a period in which the introduction of the wastewater is carried out prescribed times, based on the detection results of the pH detection means 3 and the ORP detection means 4 and controls the amount of air supply by the air supply means 2 so as to correct the variations.</p> |
