TY - JOUR
T1 - The application of a novel non-thermal plasma device with double rotary plasma jets for inactivation of Salmonella Enteritidis on shell eggs and its effects on sensory properties
AU - Lin, Chia Min
AU - Herianto, Samuel
AU - Chen, Hsiu Ling
AU - Chiu, Yen Chuan
AU - Hou, Chih Yao
N1 - Funding Information:
This research was funded by the Ministry of Science and Technology (MOST) of Taiwan under grant numbers MOST-108-2622-E-009-003-CC1 and MOST-109-2622-E-009-001-CC1, and Southern Taiwan Interdisciplinary Center for Innovate Technologies (STICIT) under grant numbers 107-(FY107). The authors would like to thank Mechanical and Mechatronics Systems Research Labs, Industrial Technology Research Institute for establishing the NTP jet system for this study.
Funding Information:
This research was funded by the Ministry of Science and Technology ( MOST ) of Taiwan under grant numbers MOST-108-2622-E-009-003-CC1 and MOST-109-2622-E-009-001-CC1 , and Southern Taiwan Interdisciplinary Center for Innovate Technologies (STICIT) under grant numbers 107-(FY107) . The authors would like to thank Mechanical and Mechatronics Systems Research Labs, Industrial Technology Research Institute for establishing the NTP jet system for this study.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/10/2
Y1 - 2021/10/2
N2 - Consumer awareness and distaste towards both bacterial and chemical contaminations on food items have been increasing in recent years. Non-thermal plasma (NTP) is a cutting-edge technology which has been shown to effectively inactivate bacteria on the treated foods. Although the general NTP with a single plasma jet is appropriate for the continuous operation process, it suffers limitations due to its smaller scanning area. Here, a novel NTP device with a double rotary nozzle jet system was utilized, which could treat an area instead of a point. The shell eggs inoculated with Salmonella enterica serotype Enteritidis (SE) were placed on a moving platform under the double rotary nozzle jet system. The efficacy of the NTP treatment on microbial decontamination was evaluated by testing a total of 26 combinations of operating parameters consisting of various plasma power (150, 180, 210 W), argon flow rate (10, 15, 20 slm), repetition of the moving platform (4, 6, 8 times), and speed of the moving platform (5, 10 mm/s). Although significantly higher SE reduction (p < 0.05) was achieved with higher power, more repetitions, larger argon flow rates, and lower speed of the platform, these parameters induced significant alterations in the sensory properties of the treated eggs. By comprehensively considering the bacterial reductions, egg quality, and sensory properties, NTP treatment with combination T (180 W-15 slm-6 times-10 mm/s) was determined to be the optimal parameter, which achieved >4 log CFU/egg of SE reduction and significantly better sensory properties than commercially washed eggs (p < 0.05). Additionally, SEM analysis revealed that NTP treatment with combination T resulted in less damage to egg cuticles compared to commercially washed eggs. This novel NTP device offers an efficient antibacterial activity under shorter exposure time (30 s), smaller argon flow rate (15 slm), and lower power (180 W) without adversely affecting the overall quality of the treated eggs. Therefore, this NTP device equipped with the double rotary jet system possesses a potential solution for future industrial applications.
AB - Consumer awareness and distaste towards both bacterial and chemical contaminations on food items have been increasing in recent years. Non-thermal plasma (NTP) is a cutting-edge technology which has been shown to effectively inactivate bacteria on the treated foods. Although the general NTP with a single plasma jet is appropriate for the continuous operation process, it suffers limitations due to its smaller scanning area. Here, a novel NTP device with a double rotary nozzle jet system was utilized, which could treat an area instead of a point. The shell eggs inoculated with Salmonella enterica serotype Enteritidis (SE) were placed on a moving platform under the double rotary nozzle jet system. The efficacy of the NTP treatment on microbial decontamination was evaluated by testing a total of 26 combinations of operating parameters consisting of various plasma power (150, 180, 210 W), argon flow rate (10, 15, 20 slm), repetition of the moving platform (4, 6, 8 times), and speed of the moving platform (5, 10 mm/s). Although significantly higher SE reduction (p < 0.05) was achieved with higher power, more repetitions, larger argon flow rates, and lower speed of the platform, these parameters induced significant alterations in the sensory properties of the treated eggs. By comprehensively considering the bacterial reductions, egg quality, and sensory properties, NTP treatment with combination T (180 W-15 slm-6 times-10 mm/s) was determined to be the optimal parameter, which achieved >4 log CFU/egg of SE reduction and significantly better sensory properties than commercially washed eggs (p < 0.05). Additionally, SEM analysis revealed that NTP treatment with combination T resulted in less damage to egg cuticles compared to commercially washed eggs. This novel NTP device offers an efficient antibacterial activity under shorter exposure time (30 s), smaller argon flow rate (15 slm), and lower power (180 W) without adversely affecting the overall quality of the treated eggs. Therefore, this NTP device equipped with the double rotary jet system possesses a potential solution for future industrial applications.
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U2 - 10.1016/j.ijfoodmicro.2021.109332
DO - 10.1016/j.ijfoodmicro.2021.109332
M3 - Article
C2 - 34358812
AN - SCOPUS:85111642816
SN - 0168-1605
VL - 355
JO - International Journal of Food Microbiology
JF - International Journal of Food Microbiology
M1 - 109332
ER -