Escherichia Coli Inactivation in Water Using Pulsed Discharge

被引：15

作者：

Huang, Yifan ^{[1
]}

Kou, Yanqin ^{[2
]}

Zheng, Chao ^{[2
]}

Xu, Yuzhen ^{[1
]}

Liu, Zhen ^{[1
]}

Yan, Keping ^{[1
]}

机构：

[1] Zhejiang Univ, Inst Ind Ecol & Environm, Minist Educ, Key Lab Biomass Chem Engn, Hangzhou 310007, Zhejiang, Peoples R China

[2] Zhejiang Inst Med Devices, Hangzhou 310009, Zhejiang, Peoples R China

来源：

IEEE TRANSACTIONS ON PLASMA SCIENCE | 2016年 / 44卷 / 06期

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

Escherichia coli; nonthermal plasma; pulsed discharge; water disinfection; ATMOSPHERIC-PRESSURE; NONTHERMAL PLASMA; STERILIZATION; DISINFECTION; BACTERIA; ARC;

D O I：

10.1109/TPS.2016.2559802

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

In this paper, a new multiple -needle -cylinder reactor is designed to study the Escherichia coli inactivation with an unstable pulsed arc discharge in water and investigate the influence of several parameters for promoting its industrial application. The results show that the inactivation rate is mainly determined by energy density. About three orders reduction can be obtained with an initial cell count of 3 x 105 CFU/mL and energy density around 2 J/mL. The inactivation rate can almost reach 100% when the energy density is around 8 J/mL. For reaching the maximum inactivation rate of this system, the parameters including initial water conductivity below 50 itS/cm, initial cell count over 104 CFU/mL, and bubbling flow rate around 3.5 L/min are recommended. The water conductivity, pH value, and concentrations of hydrogen peroxide and ozone are also measured during the treatment to evaluate their influence. The transmission electron microscopy images of E. coli indicate that the intracellular morphology changes after plasma treatment.

引用

页码：938 / 943

页数：6

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