Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
PHOSPHORUS RECOVERY METHOD AND PHOSPHORUS RECOVERY SYSTEM
Document Type and Number:
Japanese Patent JP2008221148
Kind Code:
A
Abstract:

To provide a phosphorus recovery method and a phosphorus recovery system which can realize the elution of phosphorus with a high efficiency.

A phosphorus recovery system 100 comprises a phosphorus dissolution tank 9 for adding a coagulating agent to wastewater to produce coagulated sludge and eluting phosphorus from the coagulated sludge, a phosphorus adsorption reaction tank 11 for adding a zirconium mesostructure to the eluted phosphorus solution to adsorb phosphorus on the structure, a phosphorus elution tank 12 for eluting phosphorus from the structure, and a phosphorus recovery tank 15 for recovering the phosphorus as calcium phosphorus. In the phosphorus dissolution tank 9, citric acid is added to the coagulated sludge to elute the phosphorus. Further, the zirconium mesostructure is added to adsorb the phosphorus to the structure. Thereafter, the remaining citric acid solution is again added to the coagulated sludge to elute the phosphorus.


Inventors:
WATANABE YOSHIKIMI
IWAMOTO MASAKAZU
MORIOKA TAKAYUKI
SASAKI YASUNARI
Application Number:
JP2007000064078
Publication Date:
September 25, 2008
Filing Date:
March 13, 2007
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
UNIV HOKKAIDO
FUJI ELECTRIC SYSTEMS CO LTD
International Classes:
C02F1/58; B01D21/01; B01J20/22; B01J20/34; B01J49/00; C02F1/28; C02F1/42; C02F1/52; C02F11/00; C01B25/32
Domestic Patent References:
JP2003010861A2003-01-14
JP2006055835A2006-03-02
JP2004033897A2004-02-05
Attorney, Agent or Firm:
坂本 智弘