Title:
MEMBRANE SEPARATION DEVICE AND MEMBRANE SEPARATION METHOD
Document Type and Number:
WIPO Patent Application WO/2018/173354
Kind Code:
A1
Abstract:
Provided is a membrane separation device whereby the airflow of membrane surface aeration can be suppressed and operating cost can be reduced. The present invention is provided with a separation membrane 2 for filtering water to be treated in a membrane separation tank 1, a membrane surface aeration device 5 for performing membrane surface aeration from a diffuser pipe 7 installed in below the separation membrane, an organic matter concentration measurement means 19 for measuring the concentration of organic matter in the water to be treated, a pressure measurement unit 17 for measuring a transmembrane pressure difference of the separation membrane, a transmembrane pressure difference increase rate comparison means 15 for comparing a transmembrane pressure difference increase rate selected from the value of the organic matter concentration measured by the organic matter concentration measurement means and a transmembrane pressure difference increase rate calculated from the transmembrane pressure difference measured by the pressure measurement unit, and a control unit 16 for controlling the airflow of membrane surface aeration by the membrane surface aeration device 5, and the present invention is configured so that the airflow of membrane surface aeration is varied by the control unit 16 on the basis of a difference in the transmembrane pressure difference increase rate obtained by the transmembrane pressure difference increase rate comparison means 15.
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Inventors:
HAYASHI YOSHIFUMI (JP)
YOSHIDA WATARU (JP)
IMAMURA EIJI (JP)
NODA SEIJI (JP)
YASUNAGA NOZOMU (JP)
YOSHIDA WATARU (JP)
IMAMURA EIJI (JP)
NODA SEIJI (JP)
YASUNAGA NOZOMU (JP)
Application Number:
PCT/JP2017/040283
Publication Date:
September 27, 2018
Filing Date:
November 08, 2017
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
C02F1/44; B01D65/02
Domestic Patent References:
| WO2013146976A1 | 2013-10-03 | |||
| WO2017033478A1 | 2017-03-02 | |||
| WO2011158559A1 | 2011-12-22 | |||
| WO2014034836A1 | 2014-03-06 |
Foreign References:
| JP2012200631A | 2012-10-22 | |||
| JPH11319516A | 1999-11-24 | |||
| JP2015231591A | 2015-12-24 | |||
| JP2005144291A | 2005-06-09 |
Attorney, Agent or Firm:
OIWA Masuo et al. (JP)
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