The application of novel rotary plasma jets to inhibit the aflatoxin-producing Aspergillus flavus and the spoilage fungus, Aspergillus niger on peanuts

Chia Min Lin, Anil Kumar Patel, Yen Chuan Chiu, Chih Yao Hou, Chia Hung Kuo, Cheng Di Dong, Hsiu Ling Chen

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The major safety risk of peanuts is contamination with aflatoxin. Cold atmospheric plasma (CAP) has been demonstrated to inactivate fungi effectively. In this study, a novel CAP device with a rotary jet system was used to inactivate the existing A. flavus and A. niger on peanuts. The initial inoculation levels were 6.39 and 5.83 log CFU/g of A. flavus and A. niger, respectively. After treatments at 180 W for 7.5 min and 200 W for 5 min, A. flavus was not detected. For A. niger, the treatments at 180 W for 10 min and 200 W for 5 min resulted in undetected population. Observation under scanning electron microscope revealed the fungal spores were evidently damaged. The growth of A. flavus and aflatoxin concentrations were significantly lower (p < 0.05) on the group treated with 200 W for 5 min than other treatment groups stored for 29 d. Oil quality indexes of the CAP-treated peanuts were maintained in the range of excellent grades. This study demonstrated CAP effectively inhibited fungal growth and toxin production without adversely affected oil quality.

Original languageEnglish
Article number102994
JournalInnovative Food Science and Emerging Technologies
Volume78
DOIs
Publication statusPublished - 2022 Jun

All Science Journal Classification (ASJC) codes

  • Food Science
  • Chemistry(all)
  • Industrial and Manufacturing Engineering

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