Abstract: O₃/Na₂S₂O₈ coupling system has been used for the pretreatment of pharmaceutical wastewater,and the influence of the factors,such as Na₂S₂O₈ dosage,pH,reaction time,etc. on the removing rates of COD and chroma investigated. The results indicate that the removing rates of COD and chroma are increased with the increase of Na₂S₂O₈ dosage,O₃ ventilation capacity and reaction time. Under alkaline conditions it is more conducive to the removal of pollutants from the wastewater. When the ozone ventilation capacity is 1.2 g/(h·L),Na₂S₂O₈ mass concentration 8 g/L, pH=8.6,and reaction time 150 min,the removing rates of COD and chroma of pharmaceutical wastewater reach 68.3% and 97%,respectively. B/C is increased from 0.12 to 0.38.

Key words: ozone, persulfate, pharmaceutical wastewater, biodegradability

摘要： 采用O₃/Na₂S₂O₈耦合体系预处理制药废水，研究了O₃通气量、Na₂S₂O₈投加量、pH、反应时间等因素对COD和色度去除率的影响。结果表明，COD和色度的去除率随着Na₂S₂O₈投加量、O₃通气量、反应时间的增加而增大，在碱性条件下更有利于废水中污染物的去除。在O₃通气量为1.2 g/（h·L）、Na₂S₂O₈投加质量浓度为8 g/L、pH=8.6、反应时间为150 min的条件下，制药废水的COD、色度的去除率分别达到68.3%、97%，B/C由0.12提高到0.38。

关键词: 臭氧, 过硫酸盐, 制药废水, 可生化性

CLC Number: 

• X703.1