If a steam that is septic (anaerobic) receives further human waste containing carbon, nitrogen and sulfur containing materials, what does the carbon become, the nitrogen, and finally the sulfur?

Carbon convert into methane, Nitrogen converts into Ammonia and Sulfur converts into hydrogen sulfide gas

Explanation:

As the flow time in a wastewater treatment plant increase the color of waste water converts from grey to black as the condition becomes more anaerobic and flow becomes more septic. In such scenario if more waste water is added the sulfur and nitrogen extracts from the waste are converted into ammonia and hydrogen sulfide. Carbon is present in the form of organic waste and in the absence of oxygen it gets converted into methane gas. However, in presence of oxygen this carbon is released as carbon dioxide.