Influence factors and kinetics of higher concentration ozone water on inactivation of algae

化学工业与工程

Chemcial Industry and Engineering

2023, Vol. 40

Issue (6) :136-143 DOI: 10.13353/j.issn.1004.9533.20220348

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Influence factors and kinetics of higher concentration ozone water on inactivation of algae

ZHAO Ziqin, KUANG Xinyi, WANG Shuai, LIAO Hongguo, CUI Zhengwei

Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology, School of Mechanical Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China

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Abstract At present, the available advanced oxidation processes for algae removal have problems of low efficiency, secondary pollution, etc. Taking Chlorella as research object, a high concentration ozone water cycle device assisted by a spiral cutter was designed to kill Chlorella. The effects of equilibrium concentration of ozone water, reaction time, initial optical density of algal cells and initial reaction temperature on Chlorella inactivation were investigated and kinetic analysis was conducted. The results show that the algae removal rate of ozone water on Chlorella could be as high as 96.02% when the equilibrium concentration of ozone water was 9 mg·L^-1, the initial reaction temperature was 25 ℃, the initial optical density of algal cells was 0.4 and the reaction time was 12 min. By comparing the fitting parameters, the results show that the first-order kinetic fitting was appropriate when the equilibrium concentration of ozone water was not lower than 11 mg·L^-1, the initial optical density of algal cells was not higher than 0.5, and the initial reaction temperature was not lower than 20 ℃, and moreover the second-order kinetic fitting was more appropriate when the equilibrium concentration of ozone water was lower than 11 mg·L^-1, the initial optical density of algal cells was higher than 0.5, and the initial reaction temperature was lower than 20 ℃.

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	ZHAO Ziqin
	KUANG Xinyi
	WANG Shuai
	LIAO Hongguo
	CUI Zhengwei

Keywords： chlorella ozone water killing algae kinetics

Received 2022-06-13;

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ZHAO Ziqin, KUANG Xinyi, WANG Shuai, LIAO Hongguo, CUI Zhengwei.Influence factors and kinetics of higher concentration ozone water on inactivation of algae[J] Chemcial Industry and Engineering, 2023,V40(6): 136-143

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