| 摘要 |
PURPOSE: Provided are complex oxidizing agent and a method for treating recalcitrant wastewater, the method being capable of drastically reducing non-degradable COD which is not decomposed by biological and chemical treatments in a short time. CONSTITUTION: The oxidizing agent comprises 5 to 30g of an inorganic peroxide selected from the group being consisted of sodium carbonate peroxyhydrate, sodium perborate, and its mixture; 5 to 30g of an oxidation accelerator selected from the group being consisted of disodium peroxodisulphate, diammonium peroxodisulphate, chromic peroxodisulphate, and dihydrazine sulfate; and 50 to 90g of water. The method comprises the physicochemical treatment step including the subsidiary steps of neutralizing raw wastewater and coagulating solids in wastewater, the biological treatment step for reducing BOD and COD in the wastewater by a biological reaction, the oxidation step of oxidizing non-degradable COD in the wastewater using the complex oxidizing agent, and the post treatment step including the subsidiary steps of neutralizing effluent water and coagulating solids in effluent water.
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