METHOD FOR TREATING WASTEWATER CONTAINING ORGANIC COMPOUND

• Main Author: NAKAHARA TOSHIJI
• Format: Patent
• Language: English
• Published: 22.08.2013
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

PROBLEM TO BE SOLVED: To provide a method for treating organic-compound-containing wastewater that can decompose an organic compound in the organic-compound-containing wastewater with high efficiency using hydrogen peroxide in the presence of a catalyst.SOLUTION: Wastewater (W) containing an organic compound (also referred to as "organic-compound-containing wastewater (W)) is supplied into a first oxidation catalyst reaction column 2 while adding aqueous hydrogen peroxide to the organic-compound-containing wastewater (W) from a first hydrogen peroxide supply means 9 to bring the organic-compound-containing wastewater (W) into contact with an oxidation catalyst (C), thereby decomposing the organic compound by an oxidative decomposition reaction. Simultaneously, a gaseous component is generated. However, a header tube 14A is provided at the top of the first oxidation catalyst reaction column 2 and therefore the gaseous component is discharged from a gas discharge tube 15 through the header tube 14A. The wastewater (W) is then allowed to pass through a second oxidation catalyst reaction column 3 and a third oxidation catalyst reaction column 4 in this order while discharging a generated gas. In this manner, contact catalyst oxidative decomposition of the organic compound is carried out in three stages. Thus, the organic compound can be highly decomposed.