Surface Micro Discharge-Cold Atmospheric Pressure Plasma Processing of Common House Cricket Powder: Antimicrobial Potential and Lipid-Quality Preservation

Overview

Journal Front Bioeng Biotechnol

Date 2021 Jul 19

PMID 34277580

Authors

Maria C Pina-Perez

Dolores Rodrigo

Christoph Ellert

Michael Beyrer

Affiliations

Soon will be listed here.

Abstract

The growing world population and the need to reduce the environmental impact of food production drive the exploration of novel protein sources. Insects are being cultivated, harvested, and processed to be applied in animal and human nutrition. The inherent microbial contamination of insect matrices requires risk management and decontamination strategies. Thermal sterilization results in unfavorable cooking effects and oxidation of fatty acids. The present study demonstrates the risk management in (home cricket) powder with a low-energy (8.7-22.0 mW/cm, 5 min) semi-direct surface micro discharge (SMD)-cold atmospheric pressure plasma (CAPP). At a plasma power density lower than 22 mW/cm, no degradation of triglycerides (TG) or increased free fatty acids (FFA) content was detected. For mesophilic bacteria, 1.6 ± 0.1 log reductions were achieved, and for , there were close to 1.9 ± 0.2 log reductions in a layer of powder. Colonies of , and were identified the mass spectral fingerprint analyzed with matrix-assisted laser desorption/ionization time of flight (MALDI-TOF) mass spectrometry (MS). The spores of these strains resisted to a plasma power density of 22 mW/cm. Additional inactivation effects at non-thermal, practically non-oxidative conditions are supposed for low-intensity plasma treatments combined with the powder's fluidization.

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