METHOD OF OPERATING WATER TREATMENT EQUIPMENT, AND METHOD OF PRODUCING DRINKING WATER

Japanese Patent JP2017127876

A

PROBLEM TO BE SOLVED: To provide a method allowing for shortening of a time elapsing till treated water is supplied when water treatment equipment is urgently started, and allowing for suppression of deterioration in an RO(Reverse Osmosis) membrane in a stand-by state.SOLUTION: A stand-by state in which water is not supplied to the outside of water treatment equipment includes a circulating operation step. The circulating operation step comprises a pressure-rising step of rising a pressure of untreated water stored in a raw water tank, a reverse osmosis treatment step of treating the untreated water having a pressure risen in the pressure-rising step, using an RO membrane, a treated water-returning step of returning drinking water which is treated water permeated through the RO membrane, and a concentrated water-returning step of returning concentrated water (RO membrane concentrated water) to the raw water tank, the treated water returning step being performed in parallel with the concentrated water-returning step. A step of producing and supplying drinking water comprises a pressure-rising step, a reverse osmosis membrane treatment step, and a step of supplying treated water permeated through the RO membrane as drinking water to the outside of the water treatment equipment.SELECTED DRAWING: Figure 5

NAMIMA TETSUO
FUJIOKA TOSHIYUKI

JP2017092380A

July 27, 2017

May 08, 2017

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ASAHI KASEI CORP

C02F1/44

JPS6295189A	1987-05-01
JP2010194092A	2010-09-09
JP2001047054A	2001-02-20
JP2002126733A	2002-05-08
JP2000262868A	2000-09-26
JP2002307058A	2002-10-22

Yoshiki Hasegawa
Yoshinori Shimizu
Hiroyuki Nishimoto

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