TREATMENT OF AMMONIA LIQUOR

摘要

PURPOSE:To prevent the generation of gaseous H2S occurring in the sulfuric acid reducing bacteria generated in an active carbon adsorption column which is one of ammonia liquor treatment stages. CONSTITUTION:The oxidation/reduction potential in the treated water in the final active carbon treatment stage is measured and the quantity of the air to be blown into an aeration tank is so regulated that this oxidation/reduction potential attain >=40mV in the ammonia liquor treatment method of passing the ammonia liquor generated at the time of producing coke by carbonization of coal through the aeration tank, a flocculation settling tank, a filter tank and the active carbon adsorption column to remove impurities and releasing the ammonia liquor after lowering the impurity content down to a regulated value or below. The clouding of the treated water arising from the generation of the gaseous H2S is prevented.