Bioremediation of Aflatoxin B by AF01 in Peanut Meal via Solid-State Fermentation.

The use of microorganisms to manage aflatoxin contamination is a gentle and effective approach. The aim of this study was to test the removal of AFB from AFB-contaminated peanut meal by a strain of AF01 screened by the authors and to optimize the conditions of the biocontrol. A regression model with the removal ratio of AFB as the response value was established by means of single-factor and response surface experiments. It was determined that the optimal conditions for the removal of AFB from peanut meal by AF01 were 75 h at 29 °C under the natural pH, with an inoculum of 5.5%; the removal ratio of AFB reached 69.31%. The results of simulating solid-state fermentation in production using shallow pans and fermentation bags showed that the removal ratio of AFB was 68.85% and 70.31% in the scaled-up experiments, respectively. This indicated that AF01 had strong adaptability to the environment with facultative anaerobic fermentation detoxification ability. The removal ratio of AFB showed a positive correlation with the growth of AF01, and there were no significant changes in the appearance and quality of the peanut meal after fermentation. This indicated that AF01 had the potential to be used in practical production.