To provide a method for estimating a degree of contamination of a separating membrane which is useful for predicting a rise of the pressure difference between membranes of the separating membrane in a separating membrane/activated sludge device.
The method is provided with a process of preparing a model filter (1) having a separating membrane (4)with a membrane area smaller than that of the separating membrane used in the separating membrane/activated sludge device, a process of collecting a supernatant liquid of the sludge to be separated in the separating membrane/activated sludge device, a process of filtering the collected supernatant liquid at the flow rate larger than that of the separating membrane/activated sludge device using the model filter (1), a process of measuring the first flow rate of the model filter (1) at the start of filtering the supernatant liquid, a process of measuring the second flow rate of the model filter at a predetermined time after the start of filtering the supernatant liquid, and a process of estimating the degree of contamination of the separating membrane used for the separating membrane/activated sludge device from the first flow rate and the second flow rate.
FUKUBA YOSHINORI
| JP2000033241A | 2000-02-02 | |||
| JP2001327967A | 2001-11-27 | |||
| JP2006095406A | 2006-04-13 | |||
| JP2002162338A | 2002-06-07 | |||
| JP2004188387A | 2004-07-08 | |||
| JPH01191038A | 1989-08-01 |
Fumiaki Otsuka
Shishido Kaichi
Disciple Maru Ken
Ino Sato
Toru Watanabe