AFB1 Decontamination and Fermentation of the Novel Aspergillus niger FS-UV1

Abstract:

In this paper，the changes in pH，protein，protease activity and the degradation mechanism of the new Aspergillus niger FS - UV1 which was induced by ultraviolet irradiation in potato glucose liquid medium（PDB） were studied. It is found that the pH value is declining in fermentation process，which dropped from the initial 5.9 to 1.83. The protein content showed the maximum of 10.07 g/L at 48 h，and protein activity reached the highest at 72 h with 0.98 U/ mL. The experimental results showed that AFB1 could be decontaminated by mycelium and culture filtrate，and the spores had effect on AFB1. In addition， FS - UV1 degraded aflatoxin B1（AFB1） effect was evaluated in simulation intestinal environment of pH= 7 and the degradation rate was 87.3%.