Method for purifying suspended water by membrane filtration
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United States of America Patent
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Oct 25, 2011
Grant Date -
Jun 19, 2003
app pub date -
Jan 17, 2001
filing date -
Jan 18, 2000
priority date (Note) -
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Abstract
A method for membrane filtration purification of suspended water, comprising filtering the suspended water under an external pressure through a porous hollow fiber membrane comprising a polyolefin, a copolymer of olefin and halogenated olefin, halogenated polyolefin or a mixture thereof and having an open area ratio in an outer surface of not less than 20% and a pore diameter in a minimum pore diameter layer of not smaller than 0.03 μm and not larger than 1 μm.
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