以硫酸盐还原菌、铁细菌以及异养菌数为指标,研究臭氧对石化厂循环冷却水的杀菌效果,考察了臭氧投加量、灭活时间、温度及pH等影响因素.结果表明,在投加量为100 mg/L,灭菌时间为16 min时,臭氧杀菌效率可达到99.9%以上,出水细菌数达到化工行业循环冷却水处理标准.温度和pH值的改变对杀菌效果影响不大.

Using sulfate-reducing bacteria,iron bacteria and heterotrophic bacteria as paramaters,the sterilization effect of ozone on circulating cooling water of petrochemical plants was studied.The affecting factors of ozone dosage,disinfection time,temperature and pH were evaluated.When the ozone dosage was 100 mg / L and the sterilization time was 16 min,99.9% of the microbes could be sterilized,and the circulating cooling water quality standard of chemical enterprises could be satisfied.Temperature and pH of water almost had no effect on the treating.