WATER TREATMENT SYSTEM AND METHOD FOR CONTROLLING AERATION AIR QUANTITY THEREOF

WIPO Patent Application WO/2016/103707

A1

A water treatment system is provided with: a first ammonia meter for measuring the ammoniacal nitrogen concentration in an activated sludge mixture in an aerobic tank provided with an aeration device; a second ammonia meter for measuring the ammoniacal nitrogen concentration in raw water flowing into a series of biological reaction tanks; an aeration air quantity control device for controlling the aeration air quantity in the aeration device on the basis of a target operation amount which is a target value for aeration air quantity in the aeration device; and an aeration air quantity calculation device for generating the target operation amount. The aeration air quantity calculation device has: a feedback control system including a first operation amount calculation element for generating a return target operation amount signal; a feed-forward control system including a second operation amount calculation element for generating a preceding target operation amount signal in accordance with the change amount per unit of time of the ammoniacal nitrogen concentration in the raw water; and an addition calculation element for adding the return target operation amount signal and the preceding target operation amount signal.

YAMAMOTO HIROSHI
ABE TAKASHI
FUKUMOTO KOJI
KAJIYAMA KOSUKE
NARISHIMA NAOKI

PCT/JP2015/006444

June 30, 2016

December 24, 2015

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KAWASAKI HEAVY IND LTD (JP)

C02F3/12; C02F3/30; C02F3/34

WO2013021591A1

2013-02-14

JP2012066231A

2012-04-05

PATENT CORPORATE BODY ARCO PATENT OFFICE (JP)
Patent business corporation Owner old patent firm (JP)

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