| 摘要 |
PROBLEM TO BE SOLVED: To provide a water treatment process control system which conducts simultaneous nitration denitrification comprising making nitration and denitrification progress simultaneously in the same reaction tank, in a water treatment process using active sludge.SOLUTION: A water treatment process control system includes an aerobic tank 1 which has a simultaneous nitration denitrification region making nitration and denitrification progress simultaneously, a nitration region 2 which is provided in the downstream of the simultaneous nitration denitrification region and makes nitration progress, first aeration means 4 of aerating the simultaneous nitration denitrification region, first pH measurement means 9 of measuring the pH of the influent water of the simultaneous nitration denitrification region and second pH measurement means 12 of measuring the pH of the simultaneous nitration denitrification region. The water treatment process control system is also equipped with first aeration air volume control means 13 of controlling the aeration air volume by the first aeration means 4 as follows: with the increment of pH of the measurement value of the second pH measurement means 12 relative to the measurement value of the first pH measurement means 9 taken as the pH increment of the simultaneous nitration denitrification region, a pH increment reference value for the simultaneous nitration denitrification region is set, and the aeration air volume is controlled so that the pH increment of the simultaneous nitration denitrification region becomes equal to or greater than the pH increment reference value of the simultaneous nitration denitrification region. |
