What type of sewage treatment process occurs using gravity to distribute effluent?

The sewage treatment process that utilizes gravity to distribute effluent is known as gravity distribution. This method relies on the natural force of gravity to move the effluent through pipes to the appropriate treatment areas, such as leach fields or disposal systems.

Gravity distribution is commonly used in septic systems because it is efficient and requires little energy compared to other methods that may rely on pumps or mechanical systems. The simplicity of gravity distribution helps in reducing maintenance needs and operational costs, which makes it a popular choice for residential wastewater management.

In contrast, mechanical distribution involves the use of pumps or other devices to actively move the effluent, which can add complexity and potential failure points to the system. Pressurized distribution also relies on pumps to distribute effluent under pressure, providing a different mechanism that may be necessary in specific terrains or system designs. Hybrid distribution typically combines elements of both gravity and pressurized systems, tailored to meet specific site conditions or operational requirements.