Combined treatment of air stripping-O3 and H2O2 oxidation for high concentration nitrobenzene-containing wastewater enhanced by high gravity technology

被引：0

作者：

Feng, Zhi-Rong ^{[1
,2
]}

Jiao, Wei-Zhou ^{[1
,2
]}

Liu, You-Zhi ^{[1
,2
]}

Guo, Liang ^{[1
,2
]}

Xu, Cheng-Cheng ^{[1
,2
]}

Yu, Li-Sheng ^{[1
,2
]}

Wang, Yong-Hong ^{[1
,2
]}

机构：

[1] Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology, North University of China, Taiyuan

[2] Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, Taiyuan

来源：

Hanneng Cailiao/Chinese Journal of Energetic Materials | 2015年 / 23卷 / 06期

关键词：

Air stripping; High gravity; Nitrobenzene; Ozone; Peroxide of hydrogen; Process intensification;

D O I：

10.11943/j.issn.1006-9941.2015.06.016

中图分类号：

学科分类号：

摘要：

To reduce the content of nitrobenzene in wastewater, an air stripping-O3/H2O2 oxidation treatment process enhanced by high gravity technology was established for the first time. The pretreatment of high concentration nitrobenzene-containing wastewater was conducted by air stripping method, which was enhanced by high gravity technology. The effects of high gravity factor β, gas-flow rate G, liquid-flow rate L and stripping times on the nitrobenzene stripping efficiency were investigated. The experimental results show that the combination of high gravity technology can effectively improve the nitrobenzene removal rate. When the G=20 m3·h-1, L=20 L·h-1, β=80, the concentration of nitrobenzene after stripping for 10 times is decreased to 100 mg·L-1. Then the changes of stripping efficiency are significantly weakened. The lower content wastewater is further treated by advanced oxidation process of O3/H2O2 enhanced by high gravity technology. When L=120 L·h-1, β=80, gas phase O3 concentration CO3=50 mg·L-1, the concentration of H2O2 CH2O2=4. 9 mmol·L-1, initial pH=10.5 and the processing time is 25 min, the removal efficiency of nitrobenzene can reach 99.6% and BOD5/CODCr=0.38; the wastewater treated can meet the standard of biochemistry treatment of integrated wastewater discharge standard(GB8978-1996). ©, 2015, Institute of Chemical Materials, China Academy of Engineering Physics. All right reserved.

引用

页码：589 / 593

页数：4

共 22 条

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