Badly designed sewage treatment plants lead to operation and performance failures.
Badly designed collection tanks are cause of failure of many sewage treatment tanks; most of the water comes in 3 hours of the day in the morning and 3 hours in the evening. Collection tank also has to be designed factoring in these details and the interval for removing the settled and floating sludge in collection tank. Most operators blame residents of using a lot of water, soap, detergent, disinfectants and oil. A properly designed tank should be able to handle the household waste that comes from a residence and community.