| 摘要 |
PROBLEM TO BE SOLVED: To provide a crystallization phosphorus removal method which enables a stable maintenance of a high dephosphorization effect while phosphates are recovered from wastewater containing the phosphates and a low concentration of ammonium ions, and enables a recycle of separated and recovered crystals as a fertilizer or a soil conditioner. SOLUTION: In a phosphate-containing wastewater treatment method for removing the phosphates from phosphate-containing wastewater as magnesium phosphate (Mg<SB>3</SB>(PO<SB>4</SB>)<SB>2</SB>xH<SB>2</SB>0) in presence of magnesium ions, magnesium ammonium phosphate (MgNH<SB>4</SB>PO<SB>4</SB>6H<SB>2</SB>0) is filled as a seed crystal in a crystallization reaction tank crystallizing magnesium phosphate crystals, and then made to flow after adding a magnesium agent and an alkali agent thereto, thereby crystallizing and recovering the magnesium phosphate crystals. COPYRIGHT: (C)2005,JPO&NCIPI
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