What term describes the settled solids at the bottom of a septic tank?

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Multiple Choice

What term describes the settled solids at the bottom of a septic tank?

In a septic tank, solids that settle to the bottom are referred to as sludge. This layer forms as heavier materials accumulate and sink, separated from the lighter scum that floats on top and the relatively clear liquid in the middle. The top layer, scum, consists of fats, oils, and greases. The liquid in the middle is the effluent, which should be relatively clear and flow out to the drain field. Leachate is groundwater or percolate that moves through waste and soil, not the solids inside the tank. So the settled bottom solids are sludge. Regularly pumping sludge helps prevent buildup that can disrupt tank function.

In a septic tank, solids that settle to the bottom are referred to as sludge. This layer forms as heavier materials accumulate and sink, separated from the lighter scum that floats on top and the relatively clear liquid in the middle. The top layer, scum, consists of fats, oils, and greases. The liquid in the middle is the effluent, which should be relatively clear and flow out to the drain field. Leachate is groundwater or percolate that moves through waste and soil, not the solids inside the tank. So the settled bottom solids are sludge. Regularly pumping sludge helps prevent buildup that can disrupt tank function.

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