TREATMENT METHOD AND TREATMENT APPARATUS FOR WASTEWATER

• Main Authors: OKAMURA JUNJI, KITAURA MASATSUGU, YOSHINO KAZUNORI
• Format: Patent
• Language: English; Korean
• Published: 13.01.2004
• Edition: 7
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

PURPOSE: A treatment method and a treatment apparatus for performing the decomposition treatment of wastewater containing TMAH (tetramethylammonium hydroxide) etc., and ammonia and hydrogen peroxide by a series of treatment processes are provided. CONSTITUTION: The method for treating the wastewater containing TMAH etc., ammonia and hydrogen peroxide comprises a hydrogen peroxide decomposing step of decomposing the hydrogen peroxide in the wastewater; a diffusing step of diffusing the ammonia from the H2O2 removed wastewater; a thickening step of obtaining TMAH-containing concentrate by thickening the wastewater after the diffusion of the ammonia; a gasifying step of gasifying the concentrate; and a decomposing step of decomposing the gas obtained in the gasifying step and the diffused ammonia-containing gas using a catalyst. The apparatus for treating the wastewater containing TMAH etc., ammonia and hydrogen peroxide comprises a hydrogen peroxide decomposing section(51) for decomposing the hydrogen peroxide in the wastewater; a diffusing column(26) for diffusing the ammonia from the H2O2 removed wastewater; a thickening section(56) for obtaining TMAH-containing concentrate by thickening the wastewater after the diffusion of the ammonia; a gasifier(76) for gasifying the concentrate; and a catalyst reactor(18) for decomposing the gas obtained in the gasifier and the diffused ammonia-containing gas using a catalyst.