DEPHOSPHORIZING MATERIAL, DEPHOSPHORIZING APPARATUS, AND DEPHOSPHORIZING BY-PRODUCT

摘要

PPROBLEM 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. PSOLUTION: 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: 10CaSP2+/SP+6POSB4/SBSP3-/SP+2OHSP-/SPCaSB10/SB(POSB4/SB)SB6/SB(OH)SB2/SBand a dephosphorizing by-product crystallized through the reaction is recovered by the recovering means 6. PCOPYRIGHT: (C)2011,JPO&INPIT