Your septic tank acts as the collection point for your household sewage. It provides a holding area to allow the waste to settle and for micro-organisms to break down, liquefy and deodourise the organic matter. The process is entirely biological and needs the presence of a healthy colony of bacteria and fungi to operate successfully.
Why Problems Arise
Modern cleaning agents such as disinfectants, bleaches and detergents are designed to kill bacteria. Regular use of these chemicals can upset the biological balance within the septic tank by killing off the micro-organisms that do the work. Extremes of temperature can have a similar effect