The answer to 'difference between septic tank' is that a septic tank is a self-contained underground wastewater treatment system, while a sewer system is a network of pipes and treatment facilities that collects and processes wastewater from multiple properties. Septic tanks are typically used in rural or suburban areas without access to a municipal sewer system, while sewer systems are more common in urban areas.
Septic tanks collect and partially treat wastewater from a single home or building, using natural processes to break down organic matter. The treated wastewater then flows into a drainfield or leach field, where it is further filtered and dispersed into the soil. Sewer systems, on the other hand, collect wastewater from multiple properties and transport it to a centralized treatment plant, where it undergoes more extensive processing before being discharged or reused.