Incinerated municipal sewage sludge as a secondary resource for metals and phosphorus.
Gabler-RC Jr.; Neylan-DL
Proc 3D Nat Conf on Sludge Mgmt Disposal & Util Miami Beach Florida 12/14-16/76 :197-200
As part of the Bureau of Mines secondary resource program, a study of the potential of incinerated sewage sludge ash as a resource was initiated. The concentration of various metals in sewage sludge ash was determined for 14 plants representing 11 U.S. cities. Significant differences in heavy metal content were noted from heavily industrialized cities compared with cities where most of the sewage is domestic. Extraction data on a typical industrial city sludge ash shows that most of the elements of environmental interest are removed by an acid leach. Sludge ash produced in Palo Alto, California, Contains levels of gold, palladium, and silver that warrant research on economical methods of recovery. For most U.S. cities recovery costs may only be justified as part of the disposal operation.
OP; Conference/Symposia Proceedings
Proc 3D Nat. Conf. on Sludge Mgmt., Disposal, & Util., Miami Beach, Florida, 12/14-16/76,