Title:
窒素含有排水処理システム
Document Type and Number:
Japanese Patent JP4485007
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To solve such a problem that scale is easily deposited when a nitrogen- containing drain after alkali addition is heated in the case of removing nitrogen from the nitrogen-containing waste water by ammonia stripping treatment. SOLUTION: The nitrogen-containing drain is heated with a heat exchanger 10 and, after that, treated successively by a pH adjusting vessel 20, a flocculation settling vessel 30 and a stripping tower 50. As a result, the nitrogen- containing drain is not heated after the addition of alkali and introduced into the stripping tower 50 at a relatively high temperature.
Inventors:
Norihiro Shimura
Application Number:
JP2000095081A
Publication Date:
June 16, 2010
Filing Date:
March 30, 2000
Export Citation:
Assignee:
Sumitomo Heavy Industries Environment Co., Ltd.
International Classes:
C02F1/20; C02F9/00; B01D9/02; C02F1/58
Domestic Patent References:
| JP50144267A | ||||
| JP55039218A | ||||
| JP50103164A | ||||
| JP53026273A |
Attorney, Agent or Firm:
Yoshiki Hasegawa
Shiro Terasaki
Yoshiki Kuroki
Shiro Terasaki
Yoshiki Kuroki