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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.117  No.1363 (March) (2009)  >  pp.316-319

Journal of the Ceramic Society of Japan
<<Previous article Vol.117  No.1363 (March) (2009)   pp.316 - 319 Next article>>

Phosphorus mineralization for resource recovery from wastewater using hydrothermal treatment

Takeshi ITAKURA1), Haruki IMAIZUMI2), Ryo SASAI1)2) and Hideaki ITOH1)
1) Division of Environmental Research, EcoTopia Science Institute, Nagoya University
2) Department of Applied Chemistry, Graduate School of Engineering, Nagoya University


  We investigated the resource recovery of phosphorus from aqueous media containing various inorganic phosphorus compounds by hydrothermal mineralization treatment. The hydrothermal treatment was carried out for the model wastewaters containing 2000 mg/dm3 of phosphorus in forms of PVO43-, PIIIO33-, PIO23- or a mixed aqueous solution of PIIIO33- and PIO23- with mineralizer Ca(OH)2. The phosphorus concentration in the treated water, which contained PVO43-, was less than 0.1 mg/dm3. On the other hand, the hydrothermal mineralization treatments with solid-liquid separation under hydrothermal conditions were required for the treatment of PIIIO33- and PIO23-, in order to accomplish the national effluent standard of Japan (16 mg/dm3). In this case, the phosphorus concentration in the solution treated under the optimal conditions was 0.20 mg/dm3. Thus, the hydrothermal mineralization with Ca(OH)2 is recommended as one of the detoxification and recovery techniques of phosphorus in aqueous solution.


Keyword:
Phosphorus, Wastewater, Resource recovery, Hydrothermal mineralization

Received: November 18, 2008
Accepted: January 15, 2009 , Published online: March 01, 2009
Copyright (c) 2009 The Ceramic Society of Japan

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