二级出水臭氧消毒的研究

OZONE DISINFECTION OF SECONDARY EFFLUENT

本文研究了污水回用的臭氧消毒工艺,包括臭氧在水中的衰减、二级出水的需臭氧量、接触时间和臭氧投量与微生物灭活之间的关系,并提出相应的数学模型。实验结果表明,当臭氧投量为15mg/L左右、接触时间为15min时,耐热大肠杆菌(thermo tolerant coliform TTC)和粪链球菌(fecal streptococcus FS)可以降低2—3个数量级。

In this paper,a research work on ozonation of secondary effluent including decay of ozone in secondary effluent and distilled water,ozone demand of secondary effluent,the relationship between bacteria inactivation rate and ozone dosage,contact time is illustrated. A mathematical model is presented and verified by data of the experiment. The results of experiments show that,when ozone dosage is 15mg/L and contact time is 15 min. both thermotolerant coliform and fecal streptococcus can get 2- 3 log units reduction.