Figueroa, Linda A.Neserke, George S.2022-08-092022-08-091994https://hdl.handle.net/11124/14765Includes bibliographical references (pages 61-67).masters thesesengCopyright of the original work is retained by the author.Sewage -- Purification -- Heavy metals removalSewage -- Purification -- Biological treatmentFactory and trade waste -- PurificationReduction (Chemistry)SulfatesPacked towersSewage disposal plantsBiological removal of heavy metals by sulfate reduction using a submerged packed towerText