| 摘要 |
<p>PURPOSE:To obtain easily data on the factors of a reactor and to provide an operation control method for maintaining the reactor under an optimum condition. CONSTITUTION:In a batch type active sludge treatment apparatus, waste water charged to a reactor 1 equipped with a pH meter and a dissolved-oxygen concentration meter 21 is denitrified under an anaerobic condition and then nitrified by nitrification bacteria under an aerobic condition with air supplied, and the supernatant liquid and the precipitate of sludge in the reactor 1 are extracted by pumps. An oxidation-reduction potentiometer 22 is attached to the reactor 1, and the conditions of denitrification and nitrification are judged by measuring the difference between the oxidation-reduction potentials in an anaerobic state and an aerobic state under cultivation. On the basis of this judgment, factors of the reactor 1 are obtained, providing an operation control method. The factors of the reactor 1 include denitrification time, aeration time, amount of air supplied, and amount of sludge extracted.</p> |
