Title:
WATER TREATMENT APPARATUS
Document Type and Number:
Japanese Patent JP3312507
Kind Code:
B2
Abstract:
PURPOSE: To control the addition amt. of a flocculant to the optimum amt. while keeping membrane separation capacity high to perform stable treatment by measuring the ultraviolet absorbancy of membrane filtered water from which a suspended substance is removed and performing feedback control on the basis of the measured value of ultraviolet absorbancy.
CONSTITUTION: The flocculant in a flocculant storage tank 4 is injected into the raw water of piping 11 from piping 15 equipped with a pump P2. At this time, an ultraviolet absorptiometer 6 measuring the ultraviolet absorbancy of the membrane filtered water discharged from a membrane separation part 3 is provided to piping 14 and the operation of a flocculant injection pump P2 is adjusted on the basis of the measured value of the ultraviolet absorptiometer 6 by a control part 7 to control the injection amt. of the flocculant. The ultraviolet absorptiometer 6 measuring the ultraviolet absorbancy of the membrane filtered water from the membrane separation part 3 measures the ultraviolet absorbancy within a wavelength range of 200-500nm of the membrane filtered water.
Inventors:
Kazuo Imai
Shigeki Sawada
Osamu Takeuchi
Shigeki Sawada
Osamu Takeuchi
Application Number:
JP25519094A
Publication Date:
August 12, 2002
Filing Date:
October 20, 1994
Export Citation:
Assignee:
Kurita Water Industries Ltd.
International Classes:
B01D21/30; C02F1/44; C02F1/52; (IPC1-7): C02F1/44; B01D21/30; C02F1/52
Domestic Patent References:
| JP4256406A | ||||
| JP62232540A | ||||
| JP5929073A | ||||
| JP5168819A | ||||
| JP4349910A | ||||
| JP6434411A |
Attorney, Agent or Firm:
Takeshi Shigeno