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Title:
被処理水中のアンモニア成分およびリン成分の同時回収方法、並びに同時回収システム
Document Type and Number:
Japanese Patent JP5360764
Kind Code:
B2
Abstract:

To simultaneously recover ammonia and phosphorus components as MAP from water to be treated which water contains the ammonia and phosphorus components.

The method includes the steps of: (1) adsorbing the ammonia component by bringing the water to be treated into contact with a zeolite-based cation adsorbent; (2) adsorbing the phosphorus component by bringing the water to be treated into contact with a hydrotalcite-based anion adsorbent; (3) desorbing the adsorbed components from the zeolite-based cation adsorbent and the hydrotalcite-based anion adsorbent using a common desorption liquid so that cations and anions in the desorption/regeneration liquid can be used without waste, and recovering a solution where the ammonia and phosphorus components coexist; (4) adding an alkali and magnesium ions to the recovered solution to precipitate and separate the ammonia and phosphorus components as MAP, and simultaneously recovering the ammonia and phosphorus components; and (5) reusing the solution after recovering MAP in the step (4) as at least part of the desorption liquid of the step (3).

COPYRIGHT: (C)2011,JPO&INPIT


Inventors:
Hiroyuki Araki
Yuichiro Mishima
Application Number:
JP2009246878A
Publication Date:
December 04, 2013
Filing Date:
October 27, 2009
Export Citation:
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Assignee:
National University Corporation Saga University
International Classes:
C02F1/28; B01D9/02; B01J20/12; B01J20/18; B01J20/34; B01J49/00; C01B25/45; C02F1/42; C02F1/58
Domestic Patent References:
JP9047760A
JP2008049240A
Attorney, Agent or Firm:
Hisashi Kato
Takashi Kuboyama



 
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