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Coal-Pile Drainage-Treatment Studies
A study was undertaken to acquire additional characterization data for the stormwater drainage from the coal storage pile at the TVA Kingston Steam Plant and to examine procedures for the effective treatment of the drainage water. Three storm events were sampled, roughly one year apart. Data from the first of these events were used to design and conduct a laboratory scale treatment study for the treatment of coal pile drainage waters. The low combined iron and aluminum levels in the Kingston Plant coal pile drainage were sufficient to allow treatment by neutralization with attendent iron and aluminum flocculation. Treatment parameters were developed for the Kingston waste and other simulated wastes. The latter were obtained from field coal drainage lysimeters at Oak Ridge National Laboratory. Supplemental aluminum, iron and synthetic plymers were evaluated. Laboratory studies were continued to develop design parameters for dewatering of the sludge resulting from the treatment process. The categories investigated were: thickening, conditioning, dewatering and final disposal. Estimated cost data were also generalized: and a treatment scheme consisting of lime addition, polymer addition, settling, dewatering and sludge disposal was recommended based on performance and economics. Data from the use of the EPA Extraction Procedure on the resulting sludges indicated that wastes would not be considered hazardous. Stormwater characterization showed the drainage water to be acidic, mostly in the pH range 2-4. Trace metals were mostly soluble. A few metals (aluminum, arsenic, cadmium, chromium and lead) showed notable increases in concentration with storm flow, the bulk of which was due to particulate rather than dissolved metal. Neutralization and precipitation of aluminum and iron hydrous oxides effectively removed the heavy metals studied in the Kingston coal pile drainage waters. (ERA citation 08:013750)
Coal-Pile Drainage-Treatment Studies
A study was undertaken to acquire additional characterization data for the stormwater drainage from the coal storage pile at the TVA Kingston Steam Plant and to examine procedures for the effective treatment of the drainage water. Three storm events were sampled, roughly one year apart. Data from the first of these events were used to design and conduct a laboratory scale treatment study for the treatment of coal pile drainage waters. The low combined iron and aluminum levels in the Kingston Plant coal pile drainage were sufficient to allow treatment by neutralization with attendent iron and aluminum flocculation. Treatment parameters were developed for the Kingston waste and other simulated wastes. The latter were obtained from field coal drainage lysimeters at Oak Ridge National Laboratory. Supplemental aluminum, iron and synthetic plymers were evaluated. Laboratory studies were continued to develop design parameters for dewatering of the sludge resulting from the treatment process. The categories investigated were: thickening, conditioning, dewatering and final disposal. Estimated cost data were also generalized: and a treatment scheme consisting of lime addition, polymer addition, settling, dewatering and sludge disposal was recommended based on performance and economics. Data from the use of the EPA Extraction Procedure on the resulting sludges indicated that wastes would not be considered hazardous. Stormwater characterization showed the drainage water to be acidic, mostly in the pH range 2-4. Trace metals were mostly soluble. A few metals (aluminum, arsenic, cadmium, chromium and lead) showed notable increases in concentration with storm flow, the bulk of which was due to particulate rather than dissolved metal. Neutralization and precipitation of aluminum and iron hydrous oxides effectively removed the heavy metals studied in the Kingston coal pile drainage waters. (ERA citation 08:013750)
Coal-Pile Drainage-Treatment Studies
R. A. Minear (author) / D. W. Weeter (author) / P. S. Dickens (author) / K. Chen (author) / K. L. Ogle (author)
1982
208 pages
Report
No indication
English
Water Pollution & Control , Environmental Studies , Coal , Leachates , Aluminium , Runoff , Arsenic , Cadmium , Chromium , Lead , Fossil-fuel power plants , Stockpiles , Rain water , Water treatment , Flocculation , Iron , Sludges , Water removal , Chemical composition , Ph value , Removal , Tennessee valley authority , Experimental data , ERDA/010800 , ERDA/520200
Electric pile drainage treatment device, vehicle and electric pile drainage treatment method
| European Patent Office | 2022