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Incinerated Municipal Sewage Sludge as a Potential Secondary Resource for Metals and Phosphorus.

PB80133937

Publication Date	1979
Personal Author	Gabler, R. C.
Page Count	30
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 was noted. Various parameters were investigated affecting the extraction of metals and phosphorus from a typical industrial city sludge ash and from a Palo Alto, Calif., 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.
Keywords	Sludge Materials recovery Hydrometallurgy Phosphorus Aluminum Copper Zinc Leaching Ion exchanging Precipitation(Chemistry) Sulfuric acid
Source Agency	Bureau of Mines
NTIS Subject Category	71N - Nonferrous Metals & Alloys 68C - Solid Wastes Pollution & Control
Corporate Authors	Bureau of Mines, Avondale, MD. Avondale Metallurgy Research Center.
Document Type	Technical Report
Title Note	Rept. of investigations.
NTIS Issue Number	198010

Incinerated Municipal Sewage Sludge as a Potential Secondary Resource for Metals and Phosphorus.

Incinerated Municipal Sewage Sludge as a Potential Secondary Resource for Metals and Phosphorus.
PB80133937

Publication Date	1979
Personal Author	Gabler, R. C.
Page Count	30
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 was noted. Various parameters were investigated affecting the extraction of metals and phosphorus from a typical industrial city sludge ash and from a Palo Alto, Calif., 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.
Keywords	Sludge Materials recovery Hydrometallurgy Phosphorus Aluminum Copper Zinc Leaching Ion exchanging Precipitation(Chemistry) Sulfuric acid
Source Agency	Bureau of Mines
NTIS Subject Category	71N - Nonferrous Metals & Alloys 68C - Solid Wastes Pollution & Control
Corporate Authors	Bureau of Mines, Avondale, MD. Avondale Metallurgy Research Center.
Document Type	Technical Report
Title Note	Rept. of investigations.
NTIS Issue Number	198010