A remote exposure reactor (RER) for plasma processing and sterilization by plasma active species at one atmosphere

Roth, J. Reece; Sherman, D.M.; Gadri, R.B.; Karakaya, Fuat; Chen, Zhiyu; Montie, Thomas C.; Kelly-Wintenberg, K.; Tsai, Ping-Huei

doi:10.1109/27.842864

Cited by 118 publications

(55 citation statements)

References 7 publications

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“…For E. coli, Kelly-Winterberg et al [187] observed a significant influence of the attachment matrix on inactivation rate by OAUGDP; D-values for E. coli on glass, polypropylene, and agar were 70, 30, and 300 s, respectively. Roth et al [188] developed an OAUGDP system where reactive species were convectively transported to a remote reaction chamber, thus avoiding direct plasma contact; D-value for E. coli on polypropylene fabric was approximately 5 s. Iseki et al [189] applied high-density non-equilibrium atmospheric pressure plasma for inactivation of P. digitatum spores on glass slides and reported a decimal reduction time of 1.7 min. Recently, Yun et al [190] used atmospheric pressure plasma to decontaminate L. monocytogenes from disposable food containers made from plastic, aluminum, or paper.…”

Section: Inactivation Of Microorganismsmentioning

confidence: 99%

Physical Methods for Cleaning and Disinfection of Surfaces

et al. 2011

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Cleaning and disinfection are important operations in food processing because of the significant contributions to product hygiene and food safety. The transfer of residues from surfaces into a product and the contamination with adhering microorganisms must therefore be avoided with sufficient certainty. Traditional methods for the removal of adherents and inactivation of microorganisms are based on thermal, mechanical, or chemical principles and are known to be time-and energy-consuming. This has resulted in a search for alternative methods that show prospective potential for their use in food-processing plants. This review gives an overview on such methods, which are based on physical principles. In dry-ice cleaning, for example, carbon dioxide snow pellets are blasted onto a surface to remove adherents through a combined action of thermal and mechanical effects, followed by dissolution of these adherents. Ice-pigging is a procedure where an ice/ water mixture is forced through pipes, heat exchangers, or other equipment to carry off adhered substances. Another method for physical cleaning, mainly described in context with membrane filtration, is to use vibration in the ultrasonic frequency domain to reduce fouling and to stabilize permeate flux. Radiation from various sources (UV lamps, radionuclides, X-ray tubes) differs in its applicability and disinfection efficiency because of differences in energy and penetration depth. Cold plasma treatment is another promising technology that is currently under investigation for cleaning and disinfection of surfaces of inorganic and organic materials.

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Section: Inactivation Of Microorganismsmentioning

confidence: 99%

Physical Methods for Cleaning and Disinfection of Surfaces

et al. 2011

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“…These multi-slope survival curves were also recorded by Laroussi et al and Roth et al (Roth et al, 2000) who employed atmospheric pressure plasma sources for sterilization, however, a clear elucidation for this type of survival curve is lacking for the moment. The explanation given earlier for low pressure plasma sterilization is most likely not applicable to atmospheric pressure plasmas, for which it has been shown that UV photons only play a secondary role in the killing process (Herrmann et al, 1999, Yamamoto et al, 2001, Kostov et al, 2010, Laroussi, 1996.…”

Section: Survival Curves To Determine the Inactivation Efficiencymentioning

confidence: 79%

Inactivation of Bacteria by Non-Thermal Plasmas

Morent¹

2011

Biomedical Engineering - Frontiers and Challenges

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“…INTRODUCTION THERE IS considerable interest in the development of plasma sources having open structures. Such plasma sources have applications in a variety of areas including, spray coating and materials synthesis [1], [2], microwave reflection/absorption [3]- [5], sterilization and chemical neutralization [6], [7], shock-wave mitigation for sonic boom and wave-drag reductions in supersonic flights [8]- [10], and ignition in supersonic combustors [11]- [13]. Different applications have different requirements on the plasma parameters, such as the density, temperature, volume, and duration.…”

Section: Afrl-vs-ha-tr-2004-1133 262mentioning

confidence: 99%

Operational Characteristics of a Periodic Plasma Torch

Kuo¹,

Bivolaru²,

Carter

et al. 2004

IEEE Trans. Plasma Sci.

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense. Washington Headquarters Sereices, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302 Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. 14. ABSTRACT Development of a plasma torch, which is intended as an ignition aide within a supersonic combustor, is studied. The high-voltage discharge and plasma plume generated by the torch module are described in a quiescent environment and in a supersonic crossflow. Voltage-current characteristics of the discharge and optical images of the plasma plume are used to characterize the operation of the torch module. The principal advantages of this torch module are its compact design, durability, and operational flexibility. The torch module can be operated in periodic or pulsed modes, depending on the power supply used. In the periodic mode presented in this paper, the capacitors are charged at the line frequency of 60 Hz resulting in a cyclical discharge at a frequency of 120 Hz. In this mode, peak and average powers reaching 8 and 2. REPORT DATE (DD-MM-YYYY) IS. SUBJECT TERMS

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A remote exposure reactor (RER) for plasma processing and sterilization by plasma active species at one atmosphere

Cited by 118 publications

References 7 publications

Physical Methods for Cleaning and Disinfection of Surfaces

Physical Methods for Cleaning and Disinfection of Surfaces

Inactivation of Bacteria by Non-Thermal Plasmas

Operational Characteristics of a Periodic Plasma Torch

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