Title:
有機性排水の処理方法
Document Type and Number:
Japanese Patent JP6614175
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an organic wastewater treatment method that can avoid slime trouble due to microorganism growth in organic wastewater such as factory effluent and allows a treatment apparatus to be compact.SOLUTION: In an organic wastewater treatment method, a reverse osmosis membrane device 2 is installed in a raw water passage 1 into which organic wastewater W flows, and a permeate passage 3 discharging a permeate W1 and a concentrate passage 4 discharging a concentrated water W2 are branched from the reverse osmosis membrane device 2. The concentrate passage 4 communicates with a biological treatment tank 5 to discharge biologically treated water W3 from the biological treatment tank 5. A first pH adjuster supply mechanism 6 is connected to the raw water passage 1. An alkali agent is added to the organic wastewater W to adjust pH to 9 or more, and then the organic wastewater W is permeated through the reverse osmosis membrane device 2 to be separated into the permeate W1 and the concentrated water W2. Subsequently, the concentrated water W2 of the reverse osmosis membrane device 2 is subjected to biological treatment in the biological treatment tank 5.SELECTED DRAWING: Figure 1
Inventors:
Shin Arai
Application Number:
JP2017022067A
Publication Date:
December 04, 2019
Filing Date:
February 09, 2017
Export Citation:
Assignee:
Kurita Water Industries Ltd.
International Classes:
C02F1/44; B01D61/02; B01D61/12; B01D61/14; B01D61/22; B01D61/58; B01D65/06; C02F3/12; C02F5/00; C02F5/12; C02F5/14
Domestic Patent References:
| JP2009154114A | ||||
| JP2006175362A | ||||
| JP2006095363A | ||||
| JP2012139659A | ||||
| JP2001276824A | ||||
| JP2007253073A | ||||
| JP3077685A | ||||
| JP2013141643A |
Attorney, Agent or Firm:
Yuji Hayakawa
Keisuke Murasame
Keisuke Murasame