Abstract: Dairy industry waste water is characterized by high organic matter content, high ranges of the pollutants concentration and easily biodegraded. Hence, biological treatment process is a key technology used in the treatment of dairy industry waste water. While the pollutants are degraded by microorganisms developed in the waste water, it is the most important factor affecting efficiency of the treatment. In this article, the recent advancements on microbial diversity in the process of aerobic, anaerobic and the current status of bioaugmentation were discussed with the purpose of the process selection, operating parameters optimization.

Key words: dairy industry wastewater, biological treatment, microbial community, bioaugmentatio