How does a septic tank treat a continuous supply of raw sewage?

The bacteria inside the tank continually digests the waste that enters the system. Keeping the bacteria inside the system healthy is important for digestation and ongoing breakdown of the solids. Harsh chemicals can contribute to lower bacteria colony counts - leading to your tank filling up with solids to rapidly. Sticking to greener type detergents will allow maximum bacteria growth which will result in optimal breakdown of the solids.