REMOVAL OF OIL AND GREASE FROM THE WASTEWATER OF RAILROAD REPAIR SHOP
The purposes of this research have been to determine the wastewater quality of a typical railroad repair workshop and to find a way to reduce the concentrations of present contaminants especially oil and grease. The mean concentrations of oil, COD and SS in the wastewater studied were 287.69, 775.85...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Tehran University of Medical Sciences
1997-12-01
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| Series: | Iranian Journal of Public Health |
| Subjects: | |
| Online Access: | https://ijph.tums.ac.ir/index.php/ijph/article/view/1786 |
| _version_ | 1818886734048395264 |
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| author | Z.Johari A.R. Mesdaghinia F. Vaezi M. Ghaserni |
| author_facet | Z.Johari A.R. Mesdaghinia F. Vaezi M. Ghaserni |
| author_sort | Z.Johari |
| collection | DOAJ |
| description | The purposes of this research have been to determine the wastewater quality of a typical railroad repair workshop and to find a way to reduce the concentrations of present contaminants especially oil and grease. The mean concentrations of oil, COD and SS in the wastewater studied were 287.69, 775.85 and 28723, respectively with average daily discharge to be 30-35 m3. Three successive treatment processes were used and the results showed the first stage was gravity flotation with 90 minutes retention time. Removal efficiencies achieved for COD, SS and oil were determined 43%, 49.4% and 55.5% respectively. The second stage of treatment was coagulation either lime or ferric chloride could be used for this purpose at PHs of 9 and 6. COD and oil removals by lime treatment were 76.6% and 84.4%. The final stage of treatment was DAF at 3 atmospheric pressure, by which 92.5%, 89.5%, 89.92% and 88% removals were achieved for oil, SS and COD, respectively. |
| first_indexed | 2024-12-19T16:26:02Z |
| format | Article |
| id | doaj.art-9dd850569b6745b088e776be62416bc6 |
| institution | Directory Open Access Journal |
| issn | 2251-6085 2251-6093 |
| language | English |
| last_indexed | 2024-12-19T16:26:02Z |
| publishDate | 1997-12-01 |
| publisher | Tehran University of Medical Sciences |
| record_format | Article |
| series | Iranian Journal of Public Health |
| spelling | doaj.art-9dd850569b6745b088e776be62416bc62022-12-21T20:14:20ZengTehran University of Medical SciencesIranian Journal of Public Health2251-60852251-60931997-12-01263-41775REMOVAL OF OIL AND GREASE FROM THE WASTEWATER OF RAILROAD REPAIR SHOP Z.Johari0 A.R. Mesdaghinia1 F. Vaezi2 M. Ghaserni3 The purposes of this research have been to determine the wastewater quality of a typical railroad repair workshop and to find a way to reduce the concentrations of present contaminants especially oil and grease. The mean concentrations of oil, COD and SS in the wastewater studied were 287.69, 775.85 and 28723, respectively with average daily discharge to be 30-35 m3. Three successive treatment processes were used and the results showed the first stage was gravity flotation with 90 minutes retention time. Removal efficiencies achieved for COD, SS and oil were determined 43%, 49.4% and 55.5% respectively. The second stage of treatment was coagulation either lime or ferric chloride could be used for this purpose at PHs of 9 and 6. COD and oil removals by lime treatment were 76.6% and 84.4%. The final stage of treatment was DAF at 3 atmospheric pressure, by which 92.5%, 89.5%, 89.92% and 88% removals were achieved for oil, SS and COD, respectively.https://ijph.tums.ac.ir/index.php/ijph/article/view/1786GreaseGravity filtrationDissolved Air Flotation (DAF) Industrial wastewater |
| spellingShingle | Z.Johari A.R. Mesdaghinia F. Vaezi M. Ghaserni REMOVAL OF OIL AND GREASE FROM THE WASTEWATER OF RAILROAD REPAIR SHOP Iranian Journal of Public Health Grease Gravity filtration Dissolved Air Flotation (DAF) Industrial wastewater |
| title | REMOVAL OF OIL AND GREASE FROM THE WASTEWATER OF RAILROAD REPAIR SHOP |
| title_full | REMOVAL OF OIL AND GREASE FROM THE WASTEWATER OF RAILROAD REPAIR SHOP |
| title_fullStr | REMOVAL OF OIL AND GREASE FROM THE WASTEWATER OF RAILROAD REPAIR SHOP |
| title_full_unstemmed | REMOVAL OF OIL AND GREASE FROM THE WASTEWATER OF RAILROAD REPAIR SHOP |
| title_short | REMOVAL OF OIL AND GREASE FROM THE WASTEWATER OF RAILROAD REPAIR SHOP |
| title_sort | removal of oil and grease from the wastewater of railroad repair shop |
| topic | Grease Gravity filtration Dissolved Air Flotation (DAF) Industrial wastewater |
| url | https://ijph.tums.ac.ir/index.php/ijph/article/view/1786 |
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