Abstract: A raw sewage treatment system for treating grease trap raw sewage waste. The raw sewage is transferred via closed piping into an emulsifier/grinder pump into a first heating chamber where the fats in the waste melt. Here the heavier solids are allowed to settle out, and are removed by a conveyor. The waste then travels to a second heating chamber, where pathogens are killed at a higher temperature than found in the first heating chamber. The waste is de-emulsified in the second heating chamber, and the fats are pumped off the top. The remaining liquid passes through a shaker screen and a two-phase centrifuge to remove additional solids. The liquid then is treated in a biological reactor to reduce the volatile organics. The water is then discharged either to the environment or into a wastewater sewer.