What is the purpose of baffles in a septic tank?

The purpose of baffles in a septic tank is primarily to separate solids from liquids. Baffles are internal structures that guide the flow of wastewater within the tank. When wastewater enters the septic tank, the baffles help to create distinct areas where solids can settle at the bottom while allowing liquids to flow to the outlet. This separation is critical for the efficient functioning of the septic system, as it prevents the solids from leaving the tank and entering the drain field, which could lead to clogs and system failure. By maintaining this separation, baffles ensure that the tank operates effectively, promoting a more efficient breakdown of waste and the treatment of effluent before it is discharged into the ground.

The other options do not accurately represent the primary function of baffles in a septic tank. While bacterial growth is essential for the treatment of waste, it is not the role of the baffles to enhance this process directly. Structural support is also not the function of baffles; instead, they facilitate flow management. Similarly, while noise reduction might be a concern in some systems, it is not the purpose of baffles in a septic tank context.