METHOD FOR TREATING WASTE WATER PRODUCED FROM THE PREPARATION PROCESS OF NITRO COMPOUNDS

摘要

PURPOSE: A method for processing waste water is provided to reduce the cost required for manufacturing products by easily disposing acidic or alkaline aqueous waste water without a complex microorganism processing facility. CONSTITUTION: A method for processing waste water generated from a nitro compound preparing process with respect to compounds includes the following: Acidic and alkaline waste water generated from a nitro compound cleaning process and aqueous distillate generated from a sulfuric acid concentrating process are mixed. A nitro compound is separated from the mixed waste water. Remained aqueous waste water is evaporated and concentrated under a vacuum condition to obtain aqueous distillate. The acidic and alkaline waste water and the aqueous distillate are mixed. The nitro compound is coagulated and separated. The remained aqueous waste water is separated into concentrated water and condensed water.