摘要
ClO2因其优良的性能被主要应用于给水处理领域.土霉素制药废水难以生物降解,利用ClO2强氧化性对其进行处理研究.以废水COD和BOD5为评价指标,考察了常温常压下ClO2的投加量、氧化反应时间和pH值等主要因素对制药废水处理效果的影响.在单因素试验的基础上采用正交试验方案,确定了最佳工艺条件.研究表明,用ClO2处理COD值为4 710 mg/L的土霉素制药废水时,ClO2投加量为1 500 mg/L,氧化反应时间为50 min,最佳pH值为6.6.在此条件下,COD的去除率为52.2%,处理后的BOD5/COD由原来的0.17提高到0.52.与用Fenton试剂氧化处理的效果相比较,虽然COD的去除率不如后者高,但处理时的pH值趋于中性,节省了大量调节用酸,而且可生化性大幅提高,处理后生成的难降解沉淀大大减少,脱色、除味效果好.
Chlorine dioxide（ClO2） is mainly used in water supply treatment because of its excellent functions.With its strong oxidizability,it is used in the study of the oxidation and degradation of oxytetracycline pharmaceutical wastewater that is hard to be refreshed.The oxidation effect is evaluated by the changes of COD and BOD5.The influences of dosage of ClO2,oxidation time,pH value on wastewater treatment under normal temperature and pressure are investigated.Orthogonal experiment is applied based on the single factor experiment,the optimal process condition for the wastewater with initial COD 4 710 mg/L is determined as follows： the dosage of ClO2 is 1 500 mg/L,the oxidation reaction time is 50 min,the pH value is 6.6.Under the said condition,the removal rate of COD reaches 52.2%,and the ratio of BOD5/COD goes from 0.17 to 0.52.Compared with the oxidation effect of Fenton reagent,it can be concluded that although the removal rate of COD by ClO2 treatment is lower than that of Fenton＇s,the pH value in processing is closer to neutral,thus saved large quantity of acid.Moreover the biodegradability is improved significantly,the produced refractory precipitation reduces largely and also with better de-coloring and de-odoring effect.
出处
《哈尔滨商业大学学报（自然科学版）》
CAS
2010年第5期541-544,582,共5页
Journal of Harbin University of Commerce：Natural Sciences Edition
基金
黑龙江省自然科学基金资助项目(B200813)
关键词
CLO2
高级氧化
土霉素
制药废水
chlorine dioxide
advanced oxidation
oxytetracycline
pharmaceutical wastewater
