Record Display for the EPA National Library CatalogRECORD NUMBER: 33 OF 532
|Main Title||Appraisal of Neutralization Processes to Treat Coal Mine Drainage.|
|Author||Lovel, Harold L. ;|
|CORP Author||Pennsylvania State Univ., University Park. Coll. of Earth and Mineral Sciences.|
|Report Number||EPA-14010-EFN; 06512,; 670/2-73-093|
|Stock Number||PB-231 249|
|Additional Subjects||Coal mines ; Mine waters ; Industrial waste treatment ; Neutralizing ; Sludge disposal ; Dewatering ; Calcium carbonates ; Limestone ; Magnesium carbonates ; Sodium carbonates ; Sodium hydroxide ; Bacteria ; Oxidation ; Aerobic processes ; Cost engineering ; Water pollution control ; Mine acid drainage|
Four different quality drainages were treated and detailed results tabulated. Appropriate unit operations, from water collection to sludge disposal were considered for eight different reagents (calcium/magnesium carbonate, oxide and hydroxide; caustic soda and soda ash). Necessary process variations were possible with a versatile 500,000 gpd facility. Limestone has the least cost per neutralization equivalent and may be used with drainage containing up to 500 mg/l iron II. The resulting sludge is dense, rapid settling and dewaterable. Thickeners are preferred to settling lagoons to separate sludge in larger plants. Dewatered sludge requires least disposal volume.