Water production system and operation method therefor

Abstract

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.

Description

technical field [0001] The present invention relates to a water generation system utilizing composite water treatment technology and its operation method, and relates to a water generation system and its operation method for producing fresh water from various kinds of raw water. More specifically, it relates to a fresh water production system applicable to the field of water purification treatment for water pipes, or the field of industrial water production such as industrial water, food and medical process water, agricultural water, and semiconductor-related cleaning water. Background technique [0002] In recent years, the technological development of separation membranes has been carried out, and the use of separation membranes in various applications, including water treatment, has been expanding due to their features such as saving space, saving labor, and improving the quality of filtered water. For example, for microfiltration membranes (MF membranes) and ultrafiltrat...

AI Technical Summary

Problems solved by technology

[0013] In terms of the amount of sewage and wastewater, if the equipment is built near a large-scale sewage treatment plant or a large-scale factory, the corresponding amount can be ensured, but it is difficult for small-scale sewage treatment plants, decentralized sewage treatment plants, and small and medium-scale factories. Ensure that the amount of sewage and waste water is large

From this point of view, the systems of Patent Document 2 and Non-Patent Document 3 have the problem that they cannot fully adapt to the enlargement of the system when the required amount of water production is large or the amount of sewage and wastewater is small.

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