Q1: The digested sludge from septic tanks, is removed after a maximum period of

ANS:A - 3 years

The digested sludge from septic tanks is typically recommended to be removed after a maximum period of 3 years. Regular removal of digested sludge from septic tanks is essential to maintain the proper functioning and efficiency of the system. Over time, solids accumulate at the bottom of the tank, forming sludge layers that can reduce the effective capacity of the tank and impair its ability to treat wastewater effectively. While the exact frequency of sludge removal may vary depending on factors such as tank size, household occupancy, and usage, a general guideline suggests pumping out the accumulated sludge every 2 to 3 years to prevent overflow, clogging, and potential system failures. Therefore, the recommended maximum period for removing digested sludge from septic tanks is typically around 3 years to ensure optimal performance and longevity of the system.