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Hitachi

Hitachi Infrastructure Systems (Asia) Pte. Ltd.

Overview

We take the phosphorus and calcium in waste water and precipitate it on the surface of the crystallized material in the form of a phosphate compound (hydroxy apatite).
The increased extra crystallized material can be recovered as a valuable industrial chemical raw material. Therefore, it is not discharged as industrial waste.

System & device summary

Image: Structural diagram of device
Phosphorus crystallization device configuration

Image: Precipitating fluorine apatite on the surface of the crystallized material

Photograph: Seed crystals Shape: Granules Diameter:≈1 mm
Seed crystals
Shape: Granules
Diameter:≈1 mm

Recycling example: Excess crystallized material

Image: Recycling example: Excess crystallized material

Applications

  • Removal of phosphorus