| Main Title |
Magnesium carbonate : a recycled coagulant for water treatment / |
| Author |
Black, A. P.,
|
| Other Authors |
|
| CORP Author |
Gainesville (Fla.). Department of Public Utilities. |
| Publisher |
United States Environmental Protection Agency, Office of Research and Monitoring, |
| Year Published |
1971 |
| Report Number |
EPA/620-R-71-051; 12120 ESW 06/71; EPA-12120-ESW; 09387, |
| Stock Number |
PB-209 938 |
| OCLC Number |
39559867 |
| Subjects |
Water--Purification ;
Magnesium carbonate
|
| Additional Subjects |
Water--Purification ;
Magnesium carbonate ;
( Water treatment ;
Clarification) ;
( Coagulants ;
Magnesium carbonates) ;
( Coagulation ;
Water treatment) ;
Precipitation(Chemistry) ;
Magnesium hydroxides ;
Calcium oxides ;
Performance evaluation ;
Sludge disposal ;
Reclamation ;
Regeneration(Engineering) ;
Cost estimates ;
Operating costs ;
Chemical reactions ;
Decoloring
|
| Internet Access |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| EJBD |
EPA 620-R-71-051 |
c.1 |
Headquarters Library/Washington,DC |
11/07/2013 |
| ELBD ARCHIVE |
EPA 620-R-71-051 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
| ELBD RPS |
EPA 12120-ESW-06-71 |
repository copy |
AWBERC Library/Cincinnati,OH |
10/17/2014 |
| ELBD |
EPA 12120-ESW-06-71 |
|
AWBERC Library/Cincinnati,OH |
12/18/2020 |
| NTIS |
PB-209 938 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
x, 106 pages : illustrations, figures, tables ; 28 cm |
| Abstract |
Laboratory investigations into the use of magnesium carbonate instead of alum for coagulation have demonstrated that the magnesium carbonate system produces a treated water with superior characteristics compared to water treated with alum. Both turbidity and organic color removals were comparable for both processes, and the flocs formed by the magnesium carbonate process were larger and heavier than alum flocs with better settling characteristics. The process involves the use of the magnesium carbonate as a coagulant and lime is added to precipitate gelatinous Mg(OH)2. The sludge, composed of a slurry of Mg(OH)2, CaCO3, and clay is carbonated and the Mg(OH)2 selectively and completely dissolved. Recycle after filtering allows re-use of both the magnesium carbonate and the sludge water. CaCO3 can also be recovered easily in large plants or landfilled at small ones. Chemical treatment costs for most waters can be substantially reduced using this system, while the quality of treated water will be superior to the quality of alum-treated water. (Author) |
| Notes |
"June, 1971." "Research conducted by the Department of Public Utilities, City of Gainesville, Florida." Includes bibliographical references (pages 79-85). |
