Enhancing hydroxyl radical production in ozone water by new type static mixer

Authors

LIU Xin-yu, School of Mechanical Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China; Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment Technology, Wuxi, Jiangsu 214122, China
ZHANG Bo-wen, School of Mechanical Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China; Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment Technology, Wuxi, Jiangsu 214122, China
CUI Zheng-wei, School of Mechanical Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China; Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment Technology, Wuxi, Jiangsu 214122, China

Abstract

Objective: A new type of static mixer to enhance the ozone gas-liquid phase mass transfer was established in this study. Methods: The effects of different ozone gas flow rates, liquid flow rates and liquid temperature on the concentration of ozone liquid phase and the generation of hydroxyl radicals were investigated, and were compared with the microporous aeration method and the circulating jet method. Results: With the increase of the gas-liquid flow rate, the ozone water saturation concentration and the hydroxyl radical concentration both increased; as the temperature increased, the ozone water saturation concentration decreased, but the hydroxyl radical concentration increased. With the gas flow rate at 2, the liquid flow rate at 12 L/min and the liquid temperature at 10 ℃, the saturated concentration of ozone water reached 12.67 mg/L, and the concentration of hydroxyl radicals in ozone water was 85.11 μmol/L. The output of hydroxyl radicals was higher than that of microporous exposure. The air method and the circulating jet method increased by 73.4% and 20.6%, respectively. Conclusion: The new static mixer has a significant strengthening effect on the ozone-water liquid phase mass transfer and the generation of hydroxyl radicals.

Publication Date

11-28-2021

First Page

1

Last Page

5,240

DOI

10.13652/j.issn.1003-5788.2021.11.001

Recommended Citation

Xin-yu, LIU; Bo-wen, ZHANG; and Zheng-wei, CUI (2021) "Enhancing hydroxyl radical production in ozone water by new type static mixer," Food and Machinery: Vol. 37: Iss. 11, Article 1.
DOI: 10.13652/j.issn.1003-5788.2021.11.001
Available at: https://www.ifoodmm.cn/journal/vol37/iss11/1

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