For something relatively simple in concept, there is a lot going on inside a septic tank. First and foremost, they are a settling device, but anyone who works around septic systems also knows that they are digesting waste and creating gases during the process.
It is a two-stage anaerobic process occurring in septic tanks. In the first stage, the acid forming bacteria decompose complex organic molecules to simple soluble compounds. The starches are decomposed to simple sugars and the proteins are broken down into amino acids, while the fats remain essentially intact. Continued metabolism leads to the formation of organic acids,
