Host: Japan Society of Material Cycles and Waste Management
Name : The 30th Annual Conference of Japan Society of Material Cycles and Waste Management
Number : 30
Location : [in Japanese]
Date : September 19, 2019 - September 21, 2019
A large amount of chlorine remains in the incineration residue. Therefore, in the final disposal site, the chloride ion concentration in the leachate increases, and there are cases where the proper operation of the leachate treatment facility is hindered. In addition, although chlorine is not included in the water quality control items, if it is discharged into the water environment at high concentration, it will affect agricultural damage and ecosystem. Further, if desalting treatment is carried out for the countermeasure, by-product salts are generated. Also since fly ash is a specially managed general waste, insolubilization treatment mainly using a chelating agent treatment is performed to prevent elution of Pb and the like. However, when fly ash insolubilized with a chelating agent is disposed in landfill, residual chelates increase the concentration of nitrogen and COD in the leachate, which interferes with leachate treatment. For this reason, we have confirmed that switching to inorganic drugs can solve these problems. However, compared to chelating agents, inorganic agents may be added in a large amount, which may cause economic disadvantages. Therefore, we report on basic experiments to reduce the addition rate using "Eco-acid" and inorganic phosphorus-based chemicals generated from by-product salts this time.
