DEPHOSPHORIZING MATERIAL, DEPHOSPHORIZING APPARATUS, AND DEPHOSPHORIZING BY-PRODUCT

摘要

PROBLEM TO BE SOLVED: To provide a dephosphorizing material having an excellent reaction rate of a dephosphorizing treatment, readily removing phosphorus from wastewater containing phosphorus, and, moreover, being very easy to manufacture.

SOLUTION: The dephosphorizing material is manufactured from concrete sludge produced by one of the processes of centrifugal molding of a concrete product, concrete manufacturing, cleaning of a concrete manufacturing apparatus, and cleaning of a concrete transport vehicle. The dephosphorizing material is used for the dephosphorizing treatment in a dephosphorizing apparatus 1 including a reaction tank 2 provided with a wastewater supply means 3, a dephosphorizing material supply means 4, and a recovering means 6. In the dephosphorizing apparatus 1, phosphorus is removed from the wastewater containing phosphorus like sewage, etc. on the basis of chemical equation: 10Ca2++6PO43-+2OH-→Ca10(PO4)6(OH)2and a dephosphorizing by-product crystallized through the reaction is recovered by the recovering means 6.

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