摘要
预氧化工艺常用来提高难降解工业废水的可生化性,其中以芬顿、臭氧应用最多。该文对这两种工艺提高煤化工行业焦化废水可生化性的性能做了对比,并提出了活性炭臭氧催化预氧化的改进工艺。试验表明单纯芬顿和臭氧预氧化并不能改善焦化废水的可生化性,而活性炭臭氧催化预氧化可以改善焦化废水的可生化性。经活性炭臭氧催化预氧化的焦化废水,BOD5/COD从0.16增加到0.24,COD去除率从72.5%提高到83.0%。
Coking wastewater is hard to treat because of its low biodegradability,but pre-oxidation measurements such as Fenton and ozone can elevate its biodegradability. Two processes for improving biodegradability of coking wastewater were compared,and improvement methods of activated carbon catalyzed ozonation for coking wastewater treatment were got. The results show that neither Fenton oxidation nor ozonation can improve the biodegradability,but activated carbon catalyzed ozonation （AC-ozonation）can effectively improve biodegradability better. After AC-ozone,BOD 5 / COD increases from 0. 16 to 0. 25,and rate of COD increases from 72. 5% to 83% .
出处
《净水技术》
CAS
2015年第3期22-25,共4页
Water Purification Technology
关键词
焦化废水
预氧化
可生化性
臭氧氧化
活性炭
改善
coking wastewater
pre-oxidation
biodegradability
ozonation
activated carbon
improvement
