Source: RMIT University via Phys.org, 8/20/25
A new wastewater treatment system developed by RMIT University researchers could help prevent fatbergs—solid masses of fat, oil and grease (FOG) that clog sewers and cost water utilities globally billions to remove each year. A team from RMIT's Effective Technologies and Tools (WETT) Research Center has developed a solution that combines a redesigned grease interceptor with a smart chemical treatment—more than doubling fat removal rates in commercial kitchen wastewater. The new design features a series of physical barriers, or baffles, inside a grease interceptor to slow wastewater flow and separate larger fat particles. A small dose of alum, a common water treatment chemical, is then added to clump smaller, suspended fats for easy removal.
The research article, "Performance optimization for the removal of fat, oil, and grease from food service establishment wastewater using a novel grease interceptor," is published in ACS ES&T Water.