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https://hdl.handle.net/11681/9236Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Martel, Courtland James | - |
| dc.contributor.author | Affleck, Rosa T. | - |
| dc.contributor.author | Yushak, Melinda L. | - |
| dc.date.accessioned | 2016-06-20T13:40:51Z | - |
| dc.date.available | 2016-06-20T13:40:51Z | - |
| dc.date.issued | 1996-12 | - |
| dc.identifier.uri | http://hdl.handle.net/11681/9236 | - |
| dc.description | CRREL Report | - |
| dc.description | Abstract: This report contains the results of a study to develop a mechanical device for dewatering alum sludge by freeze–thaw. This proposed device is a combination of two conventional unit operations: a vacuum filter and a blast freezer. Bench-scale studies were conducted to evaluate this concept and develop preliminary design criteria. The results of filter leaf tests indicate that a suitable sludge layer could be collected on a cloth medium at a vacuum level of only 100 mm of Hg and a 5.0-minute filtration time. The volume of sludge was reduced by 67%. The freezing tests indicated that low freezing rate and a high initial solids content had a tendency to produce large alum sludge particles. However, fast freezing rates could be achieved without reducing the effective grain size below that of a fine sand. Curing time had no effect on grain size. The electrical cost of freezing sludge with this device was estimated to be $0.004/m^3, which is not expensive in relation to the total cost of water treatment which is approximately $0.25 to $0.50/m^3. | - |
| dc.publisher | Cold Regions Research and Engineering Laboratory (U.S.) | - |
| dc.publisher | Engineer Research and Development Center (U.S.) | - |
| dc.relation | http://acwc.sdp.sirsi.net/client/en_US/search/asset/1001348 | - |
| dc.relation.ispartofseries | CRREL Report ; 96-15. | - |
| dc.rights | Approved for public release; distribution is unlimited. | - |
| dc.source | This Digital Resource was created in Microsoft Word and Adobe Acrobat | - |
| dc.subject | Alum | - |
| dc.subject | Water purification | - |
| dc.subject | Freeze–thaw conditioning | - |
| dc.subject | Water treatment plants | - |
| dc.subject | Sludge disposal | - |
| dc.subject | Sewage sludge | - |
| dc.title | A device for mechanical freeze-thaw conditioning of alum sludge | - |
| dc.type | Report | - |
| Appears in Collections: | CRREL Report | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| CR-96-15.pdf | 1.78 MB | Adobe PDF |  View/Open |