| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a separation membrane for pretreatment of seawater desalination, an apparatus for pretreatment of seawater desalination, and a method for seawater desalination, capable of constantly supplying a sufficient amount of raw water to an RO membrane without increasing the pressure, while maintaining a high flux even when removing TEP at a high removal rate. <P>SOLUTION: In the separation membrane for pretreatment of seawater desalination used for pretreatment of seawater desalination using a reverse osmosis membrane, filtration is carried out at a constant flux, and standard flux A defined as a maximum value of fluxes capable of satisfying P2≤1.5×P1 between average transmembrane pressure difference P1 at a period for initial 30 minutes and average transmembrane pressure difference P2 at a period for 30 minutes after 120 minutes have passed, is not less than 2 m/d, and saccharides removal rate B or granular carbon removal rate C is not less than 0.3, more preferably, not less than 0.5. Here, B is defined by a formula: 1-an amount of saccharides in filtrate water, and C is defined by a formula: 1-a POC in filtrate water/POC in raw water, and the POC is the amount of particulate organic carbon (difference between total amount of organic carbon and amount of dissolved organic carbon). <P>COPYRIGHT: (C)2012,JPO&INPIT |
