| 摘要 |
<p>PURPOSE:To remove nitrogen contained in waste water with the high degree of denitrification. CONSTITUTION:Organic substance contained in raw water is adsorbed to returned sludge in a mixing tank 1. The organic waste water is separated into sludge and separation liquid in a first precipitation tank 2. The separation liquid is nitrified in a nitrification tank 3. Both sludge in the first precipitation tank 2 and nitrification liquid are supplied to a denitrification tank 4 and denitrified. After the denitrification liquid is aerated in a reaeration tank 5, liquid-solid separation is performed in a second precipitation tank 6. Thereby treatment of organic waste water is performed. Further oxidation-reduction potential(ORP) of the nitrification tank 3 is controlled to 50-100mV by controlling the quantity of air sent to the nitrification tank 3.</p> |
