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- Underground tank for treatment of wastewater from a home in rural and suburban areas. Bacteria in the tank decompose organic wastes and the sludge settles to the bottom of the tank. The effluent flows out of the tank into the ground through a field of drainpipes.
EPA - Cite This Source - This Definition
- Bacteria, Biomass, Decomposition, Sewage treatment (primary), Sludge, Wastewater