A better understanding of dairy biofilms from farm to fork

Project summary

Dairy biofilms, which can contain both beneficial and harmful bacteria, pose challenges for milk quality and equipment hygiene throughout the farm-to-factory continuum. Their inadequate management can lead to significant economic losses and a decline in dairy product quality.

The aim of this project is to characterize the origin, structure and composition of biofilms on 60 dairy farms and several cheese dairies (industrial and artisanal) in Quebec and Ontario. Using bioreactors, biofilms will be studied and microbial communities identified. Bioprotective cultures will be developed from lactic acid bacteria to prevent and eliminate harmful biofilms.

The results generated by this research could contribute to better management of milk quality and equipment sanitation from the farm to the cheese dairy. They will also enable the valorization of beneficial biofilms and the development of dairy product quality control tools.

Expected results

This research aims to compare the microbial communities involved in biofilm formation on farms and in cheese factories, revealing their diversity and impact on dairy product quality. The study will provide key information on the effect of on-farm and plant management practices on biofilm formation, and lead to recommendations for improving equipment sanitation and preserving milk quality.

Analysis of beneficial biofilms in artisanal and industrial cheese production will help characterize the microorganisms associated with high-quality products. The results will enable the development of more targeted and effective cleaning strategies, such as natural antimicrobial-based solutions, to reduce the use of chemical disinfectants.

These scientific advances could reduce milk and cheese losses due to biofilm contamination and improve the quality of dairy products in Quebec and Ontario.

Main achievements

• Training of three MSc food science students, one PhD food science student, four postdoctoral fellows and one research professional
• Organization of an Op+lait technology workshop on the study of biofilms in October 2020
• Writing of an article for Le producteur de lait québécois and Milk Producer magazines
• Results presented at Novalait’s Forum Techno
• Presentation of conferences, posters or workshops to financial partners
• Writing scientific articles