The liquid displaced from the Aeration Chamber flows through small specially drilled holes at the front bottom side of the Clarification Chamber for further treatment. The suspended material and sewage solids that are too large to pass through the holes remain in the Aeration Chamber to be further reduced in size, as it continues to be mixed with the remaining aerated liquid and bacteria sludge. The liquid sludge and smaller waste material that enters the Clarification Chamber through the small holes is re-moved as the liquid flows upward through some biological filter media located inside the Clarification Chamber. Bacteria will grow on the surface of this biological filter media and produces a sticky, slimy film film that traps small particles of waste. Then the bacteria will consume the trapped particles of waste as their food supply. By the time the liquid reaches the top of the biological filter media it has passed through several layers of bacteria, ensuring that the sludge and waste removal process is completed. Any floating particles of waste that was not trapped and consumed by the bacteria that reaches the top of the biological filter media will be returned to the Aeration Chamber by means of an internal air lift pump. The clean water accumulates here until it is displaced through the crossover pipe connected to the Chlorination Chamber.