Development of Agricultural Soil Sterilization Using Ozone Generated by High Frequency Dielectric Barrier Discharge

2006 ◽  
Vol 9 (2) ◽  
Author(s):  
Kenji Ebihara ◽  
Masahiro Takayama ◽  
Tomoaki Ikegami ◽  
Kouichi Ogata ◽  
Henryka Danuta Stryczewska ◽  
...  
Keyword(s):  
Dielectric Barrier Discharge ◽  
Agricultural Soil ◽  
High Efficiency ◽  
Barrier Discharge ◽  
Chemical Properties ◽  
Ozone Treatment ◽  
High Concentration ◽  
Dielectric Barrier ◽  
Soil Sterilization ◽  
Soil Pathogen

AbstractWe have developed the ozone generation system suitable for soil sterilization and ozone supplying system into the soil. The coaxial dielectric barrier discharge produced the ozone with high concentration at high efficiency. Injection of the on- site generated ozone gas into the soil resulted in decreasing soil pathogen and changing chemical properties of the soil. We studied ozone sterilization of agricultural soil when it was treated by varying ozone dosages and process duration. The temporal and spatial properties of the soil were monitored using the pH and electrical conductivity. The bacteria populations, pathogen and soil-borne fungi were measured after various ozone treatment procedures. 100g/m3 of ozone was injected into the soil at a flow rate of 2 liter/min during 60 min. The pH shows drastic change in 40 min that will be one of indexes indicating the sterilization level. In this treatment 100% of the bacteria in the agricultural soil was killed.

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.

Dielectric Barrier Discharge Structure Design for Sewage Treatment

2014 ◽  
Vol 1037 ◽  
pp. 57-60
Author(s):  
Jian Ping Jia ◽  
Li Cai ◽  
Shou Bo Zhang ◽  
Yuan Zhao
Keyword(s):  
Dielectric Barrier Discharge ◽  
High Efficiency ◽  
Barrier Discharge ◽  
Sewage Treatment ◽  
Structure Design ◽  
Treatment Technology ◽  
Temperature Plasma ◽  
Dielectric Barrier ◽  
Discharge Structure ◽  
Treatment Research

The problem of the urban water shortage and water pollution is becoming problem more and more serious. Therefore, governments around the world pay close attention to the application of sewage treatment technology, especially that with high efficiency, low energy consumption and strong operability. Dielectric barrier discharge (DBD) can produce low temperature plasma under atmospheric pressure, and the application of the technology for sewage treatment research gradually becomes to be one of hot research. In this paper, the dielectric barrier discharge structure is designed, and the plasma produced is used for sewage treatment research. The system adopts coaxial type discharge structure. The research shows that the structure is safe and reliable. And, it has low discharge power and can discharge uniformly. So, the plasma produced by dielectric barrier discharge can be convenient and easy to used in sewage treatment, and the result is effective.

scholarly journals APLIKASI TEKNOLOGI DIELECTRIC BARRIER DISCHARGE-UV PLASMA TERHADAP SIFAT FISIK DAN KIMIA TELUR AYAM (Gallus gallus domesticus)

BUANA SAINS ◽  
2018 ◽  
Vol 18 (1) ◽  
pp. 85
Author(s):  
Endrika Widyastuti ◽  
Aldila Daydeva
Keyword(s):  
Dielectric Barrier Discharge ◽  
Barrier Discharge ◽  
Chemical Properties ◽  
Gallus Gallus ◽  
Gallus Domesticus ◽  
Gallus Gallus Domesticus ◽  
Dielectric Barrier ◽  
Significant Difference ◽  
Physical And Chemical Quality ◽  
Haugh Unit

Eggs are food that contains high nutrition, however egg products susceptible damage so preservation process is required. Dielectric Barrier Discharge (DBD) UV Plasma has proven very effective as an alternative technology to preserve fresh egg by inactivation bacteria and prevent contamination in a fresh egg. the aim of this study is to evaluated effect of Dielectric Barrier Discharge (DBD) UV Plasma on physical and chemical quality of chicken eggs (Gallus gallus domesticus). The fresh eggs were stored at room temperature and assessed for their Physical (Haugh unit and yolk index) and chemical properties (yolk pH, albumen pH, and egg nutrition) on 0, 5, 7, 11, and 14 days. Analysis of variance (ANOVA) was used to analyze significant difference among the samples. The result shows that DBD UV plasma can maintain haugh unit, yolk index, yolk pH, and albumen pH than control. The eggs treated with DBD UV recorded have no significant difference for egg nutrition.

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