Title:
半透性特性を有する膜に対してメンテナンスを実行する方法及びシステム
Document Type and Number:
Japanese Patent JP2009521306
Kind Code:
A
Abstract:
A method and system for performing maintenance on a membrane having semi-permeable properties and is used in a pressure retarded osmosis PRO, the membrane having a high pressure first side and second side of lower pressure. A time controllable first valve or pump (31; 41; 51; 61; 71; 81; 91) is connected between an input (12) to the low pressure side of the membrane (13') and an input (11) to the high pressure side of the membrane (13'), said first valve or pump operable to selectively deliver a plug (21) of a second type of water (FW) to the first side of the membrane to lower concentration of dissolved substance(s) in water of a first type (SW) thereat, thereby creating a PRO pressure backwash function with the water of the second type (FW) from the first to the second side of the membrane pressurized on said first side by high pressure supply of water of the first type (SW) upstream of said plug (21) of water of the second type (SW).
Inventors:
Tohsen, Thor
Holt, To Life
Holt, To Life
Application Number:
JP2008547137A
Publication Date:
June 04, 2009
Filing Date:
December 20, 2006
Export Citation:
Assignee:
Statcraft Development AS
International Classes:
B01D65/02; B01D61/00; B01D65/06
Domestic Patent References:
| JPS5161177A | 1976-05-27 | |||
| JP2004505764A | 2004-02-26 |
Attorney, Agent or Firm:
▲吉▼川 俊雄