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Incinerated municipal sewage sludge as a potential secondary resource for metals and phosphorus.

Authors
Gabler-RC Jr.
Source
Avondale, MD: U.S. Department of the Interior, Bureau of Mines, RI 8390, 1979 Jan; :1-23
Link
NIOSHTIC No.
10007977
Abstract
Evaluation of incinerated sewage sludge as a secondary resource for aluminum, phosphorus, and minor constituents such as copper and zinc was initiated as part of the Bureau of Mines secondary resource program. The elemental composition of sludge ash for 14 plants in 11 U.S. cities was determined. Comparing industrialized cities with cities where most of the sewage is domestic, significant differences in heavy metal content were noted. Various parameters were investigated affecting the extraction of metals and phosphorus from a typical industrial city sludge ash and from a Palo Alto, California, sludge ash with a high precious metal content. Three extraction- recovery procedures for metals and phosphorus using sulfuric acid leaching, ion exchange, and various precipitation techniques were investigated. The last procedure developed was a combination approach using a three-stage countercurrent sulfuric acid leach that recovered most of the economic values from the sludge ash and also removed the leachable fraction of elements of environmental concern.
Publication Date
19790101
Document Type
IH; Report of Investigations
Fiscal Year
1979
NTIS Accession No.
PB80-133937
NTIS Price
A03
Identifying No.
RI-8390
NIOSH Division
AVRC
Source Name
Avondale, MD: U.S. Department of the Interior, Bureau of Mines, RI 8390
State
CA; MD
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