Denitrifying bacteria spray treatment can reduce the total TSNAs content in cured dry tablets from 1 to the best. 57 ppm dropped to 1. 26 ppm showed that the difference was statistically significant, and the degradation rate of total TSNAs in dry tablets was 19. 74%, and also reduced the content of NNN and NAT in the dried tablets samples belonging to Nongyezhan and Suzhou Tobacco Bureau.
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