Septic tanks must have which design?

The requirement for septic tank design is primarily focused on effective treatment and management of wastewater. A two or three compartment design is recognized for its ability to provide improved separation of solids and clearer liquid effluent. This design allows for better settling of solids in the first compartment and enhanced treatment in subsequent compartments, leading to a more efficient system overall. Furthermore, with compartments, the tank can better accommodate fluctuating flows and maintain optimal conditions for anaerobic digestion.

Each compartment serves a specific purpose: the first one primarily handles settling and primary treatment, and additional compartments can support further treatment and stabilization of the effluent before it moves on to the drain field. This multi-compartment approach significantly enhances the performance and longevity of the septic system, making it a more effective solution for on-site sewage disposal.