关键词: 循环冷却水 , 生物酶制剂 , COD , 氨氮

Abstract: The article adopted a kind of biological treatment technology of the circulating cooling water treatment. To four of the same water sample with different content of an enzyme preparation, determine water COD and ammonianitrogen through the effect of enzyme and microorganism. The results show that: The water samples have enzyme preparation played a significant effect to the degradation of COD and ammonianitrogen compared to the water sample with no enzyme preparation, and with the improvement of enzyme preparation content, the effect of the degradation of COD and ammonianitrogen reveals more and more good, and treated water is neutral. When enzyme preparation of dosing quantity for water sample of thirtytwo over one thousand, the removal rate of COD as high as 89% and ammonianitrogen as high as 95%.

Key words: Circulating cooling water ,  Biological enzyme preparation , Chemical oxygen demand , Ammonianitrogen