Studying Treatment Effects on Dielectric Barrier Discharge Generated by using Superimposed Voltage Waveform Pulsed-power Supply on Escherichia coli

2017 ◽  
Vol 137 (6) ◽  
pp. 328-333 ◽  
Author(s):  
Toru Sasaki ◽  
Satoru Hida ◽  
Ryo Ito ◽  
Yuki Kondo ◽  
Kazumasa Takahashi ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Dielectric Barrier Discharge ◽  
Power Supply ◽  
Treatment Effects ◽  
Barrier Discharge ◽  
Pulsed Power ◽  
Voltage Waveform ◽  
Dielectric Barrier ◽  
Pulsed Power Supply

Microsecond-Pulsed Dielectric Barrier Discharge Plasma-Treated Mist for Inactivation of Escherichia coli In Vitro

2019 ◽  
Vol 47 (1) ◽  
pp. 395-402 ◽  
Author(s):  
Pietro Ranieri ◽  
Gerard McGovern ◽  
Henry Tse ◽  
Alexander Fulmer ◽  
Mykola Kovalenko ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Dielectric Barrier Discharge ◽  
Discharge Plasma ◽  
Barrier Discharge ◽  
Dielectric Barrier Discharge Plasma ◽  
Dielectric Barrier ◽  
Barrier Discharge Plasma

scholarly journals Sterilizing Processes and Mechanisms for Treatment of Escherichia coli with Dielectric-Barrier Discharge Plasma

2019 ◽  
Vol 86 (1) ◽  
Author(s):  
Hao Wang ◽  
Liyang Zhang ◽  
Haiyun Luo ◽  
Xinxin Wang ◽  
Jinfeng Tie ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Dielectric Barrier Discharge ◽  
High Efficiency ◽  
Barrier Discharge ◽  
Treatment Time ◽  
Survival Curve ◽  
Main Process ◽  
Dielectric Barrier ◽  
Plasma Sterilization ◽  
Preparation Period

ABSTRACT With increasing attention toward novel sterilization methods, plasma sterilization has gained more and more interest. However, the underlying mechanisms are still unknown. In this paper, we investigated the inactivation of Escherichia coli using dielectric-barrier discharge (DBD) plasma in saline water. There were three processes shown in the survival curve, namely, during the preparation period, the reaction period, and the saturation period. Observations under a transmission electron microscope (TEM) and detection by Fourier transform infrared spectroscopy (FT-IR) supplied adequate details regarding these processes. Based on these results, we infer that during the preparation period, the main process is the accumulation of chemical substances. During the reaction period, adequate amounts of chemicals decompose and denature cell membranes and macromolecules to kill bacteria in large quantities. During the saturation period, the killing effect decreases because of the protection by clustered cells and the saturation of pH. This study of sterilizing processes systematically reveals the mechanisms of plasma sterilization. IMPORTANCE Compared with traditional methods, plasma sterilization has advantages of high efficiency, easy operation, and environmental protection. This may be more suitable for air and sewage sterilization in specific spaces, such as hospitals, laboratories, and pharmaceutical factories. However, the mechanisms of sterilization are still relatively unknown, especially for bactericidal activities. Knowledge of sterilization processes provides guidance for practical applications. For example, the bactericidal action mainly occurs during the reaction period, and the treatment time can be set based on the reaction period, which could save a lot of energy. The results of this study will help to improve the efficiency of plasma sterilization devices.

Sign in / Sign up

Export Citation Format

Share Document