WATER TREATMENT APPARATUS AND WATER TREATMENT METHOD

WIPO Patent Application WO/2018/074328

A1

The present invention provides a water treatment apparatus and a water treatment method capable of performing stable immersed membrane filtration at low cost even when the quality of raw water varies. A water treatment device (100) includes: a water tank (3) into which raw water is to be introduced; a membrane module (4) for subjecting raw water to filtering treatment to produce filtered water, the membrane module (4) being held in the state of being immersed in water in the water tank (3); a discharge path (10) through which stagnant water stagnating in the water tank (3) can be discharged; a flow rate adjustment device (P2) capable of adjusting the flow rate of stagnant water discharged through the discharge path (10); a water quality sensor (2) for measuring the quality of raw water; and a control unit (20) for controlling the flow rate adjustment device (P2) on the basis of the measurement by the water quality sensor (2). The water treatment method includes subjecting raw water to filtering treatment by using a water level difference while discharging stagnant water stagnating in the water tank (3), and increasing the amount of stagnant water discharged through the discharge path (10) when the amount of suspended substances included in the raw water increases.

HANAMOTO YOSUKE (JP)
SEKINE YASUNORI (JP)
YOSHIKAWA SHINICHI (JP)

PCT/JP2017/037057

April 26, 2018

October 12, 2017

Click for automatic bibliography generation  

HITACHI LTD (JP)

C02F1/44; B01D61/22; B01D65/02

JPH0975938A	1997-03-25
JPH08266874A	1996-10-15
JP2003154394A	2003-05-27
JPH10249345A	1998-09-22
JP2012196628A	2012-10-18

ISONO INTERNATIONAL PATENT OFFICE, P.C. (JP)

View/Download PDF      PDF Help

Previous Patent: MUCOSAL IMMUNOMODULATOR

Next Patent: ELECTRIC MOTOR POWER SYSTEM, AND ELECTRIC VEHICLE