Microbial Biofilms in Wastewater Treatment: A Sustainable Approach

Wastewater can be commonly defined as the discharge of used water from various sources such as residence, hospitals, and industries. This water contains numerous pollutants including organic matter, nutrients, pathogens, and chemicals, which in turn can harm the environment and human health if not treated properly. Hence, wastewater management is a major challenge in the present scenario. Toward this end, the treatment of the wastewater involves the removal of pollutants from it before being discharged into the environment. There are many different types of wastewater treatment processes, but they all involve some combination of physical, chemical, and biological processes. These techniques have low-cost efficacy and require significant ongoing maintenance. In this regard, wastewater management by biofilm bioreactors stands out for their exceptional efficiency, adaptability, and sustainability. They offer a promising future for cleaner water and a healthier planet. There are different types of bioreactors each catering to the specific needs of wastewater management. The different types of bioreactors include moving bed biofilm reactor (MBBR), fixed-film reactor (FFR), fluidized bed reactor (FBR), and rotating biological contactor (RBC). The advancements in technology combined with biofilm biology (bioreactors) hold immense potential for the future of wastewater treatment. They offer a sustainable, efficient, and cost-effective way to turn wastewater from a burden into a valuable resource, paving the way for a cleaner and healthier planet. In this review, we provide a comprehensive analysis of the landscape of wastewater and its management, exploring existing established approaches of treatment and presenting a vivid rationale for the potential biofilm-based system in revolutionizing wastewater management.