Aeration septic tank involves aeration pumps that inject the bacteria inside it. These bacteria are responsible for breaking down the waste particles. This process releases a bad odor. It is why the lid of septic tanks plays a crucial role. Septic tank lids cover the bad smell and do not http://scottandrew.bravesites.com/entries/general/why-do-you-need-a-septic-tank-lid-replacement-