This article analyzes the functions and harms of adding nitrite to the meat products. The methods of reducing and substituting nitrite in food are also been discussed.

Nitrite is an important food additive. The function and the security of nitrite in meat product were pointed out. And the methods to reduce the nitrite residue in meat products were summarized.

From another point of view, our study tries to find a potential of heterotrophic nitrification for the improvement of contaminated aquatic environment.