Answer Happy

Classify each description according to its stage o... Classify each description according to its stage of municipal sewage treatment. Suspended organic and inorganic matter settles in sedimentation tank Aeration of effluent Initial removal of solids Primary Bacteria and fungi break down organic matter Purification of wastewater for irrigation Costs five times as much as other two treatments combined Secondary Only a few percent of U.S. population served by this stage of treatment Water sometimes chlorinated after completion of biological activity Sand and gravel settle in grit chamber Tertiary Reset