| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method which predicts a deterioration in separability of liquid to be treated to improve the separability beforehand when the solid-liquid separation of organic wastewater is carried out by using a separation membrane. <P>SOLUTION: In the organic wastewater treatment method, when the solid-liquid separation of the organic wastewater is carried out by using the separation membrane installed in a microbiological treatment tank, a coagulant is added at the time when 10 to 40-day moving average temperature difference between water temperature in the microbiological treatment tank equipped with the separation membrane and air temperature in environment where the tank is installed is increased to 4°C or higher. In the organic wastewater treatment method, the coagulant is added when the filtration flow rate of the liquid to be treated by using filter paper reaches 10 ml/5 min or lower, or when a sugar concentration in the liquid to be treated reaches 30 mg/L or higher. In the organic wastewater treatment method, the coagulant is continuously or intermittently added into the microbiological treatment tank so that its concentration in 1-day treatment waste water reaches 1 mg/L or more. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
