SOUTH DAKOTA Department of
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Surface Water

Anaerobic Digestion

Picture of Anaerobic Digesters

Anaerobic digestion is the biological degradation of organic matter in an oxygen free atmosphere. Anaerobic digestion converts the biosolids into carbon dioxide, methane, hydrogen sulfide, other gases, and water. What is left behind is a biologically stable residue, referred to as biosolids.

Typically, the biosolids are reused as a soil amendment. The biosolids are rich in nutrients and provide a good alternative to fertilizer.

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