Biofilm formation and control in the food industry

Biofilms or surface attached microorganisms are a potential source of spoilage and/or pathogenic organisms in the food processing environment. Food processing environments have an abundance of exposed surfaces, upon which microorganisms may attach, grow and develop into micro colonies and biofilms. The surface population has been assessed by attaching stainless steel plates to a variety of locations in the processing environment and removing, after various time intervals, for examination by Direct Epifluorescent Microscopy. The results illustrate the levels of microorganisms that may be found in the food processing environment. In addition, results are presented that compare the effectiveness of different cleaning techniques and detergents in terms of removal of attached populations. The importance of mechanical/kinetic energy in the cleaning process and the choice of effective detergents is demonstrated.