Provided are methods of treating a surface of a food processing facility which has a first population of microorganisms disposed thereon. The method includes disposing on the surface a biofilm containing a second population of microorganisms or a population of microorganisms that can form a biofilm onto the surface of the food processing facility. The growth of the second microbial population and the formation of a biofilm comprising these microorganisms can then inhibit the growth of the first population of microorganisms.