| 摘要 |
<p>Disclosed are: a water production system which is provided with a semi-permeable membrane treatment process (A100) for subjecting water (A1) to be treated to semi-permeable treatment to produce membrane permeated water (A3) and concentrated water (A), a semi-permeable membrane treatment process (B200) which is equipped with a water (B)-to-be-treated branching means for branching water (B2) to be treated into two or more kinds of water, and subjects water (B) to be treated to the semi-permeable membrane treatment to produce membrane permeated water (B5) and concentrated water (B6), and a semi-permeable membrane treatment process (C300) which is equipped with a first water mixing means for mixing water (B) to be treated, which has been branched by the water (B)-to-be-treated branching means with at least part of the concentrated water (A) produced in a semi-permeable membrane treatment step (A), and subjects the mixed water to the semi-permeable membrane treatment to produce membrane permeated water (C7) and concentrated water (C8), thereby producing flesh water from a plurality of kinds of raw water which differ in osmotic pressure utilizing complex water treatment technology in which a plurality of membrane units using a semi-permeable membrane are disposed, and which can ensure the necessary quantity of production water, and accommodate an upsized system while responding to change in the water intake quantity of raw water; and an operation method therefor.</p> |
