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Air Flotation Treatment and Reuse of Refinery Wastewater JAMES A. HART, Conservation Specialist Mobil Oil Corporation East Chicago Refinery East Chicago, Indiana INTRODUCTION Mobil Oil Corporation's East Chicago Refinery is located on the Indiana Harbor Ship Canal, which discharges into Lake Michigan. The Great Lakes-Illinois River Basin Survey (GLIRB) made by the Health, Education, and Welfare Department in 1963, indicated a need for improving the quality of waste waters discharged into this Canal. At that time Mobil's waste treatment facilities consisted of two ballast water settling tanks and two parallel API Separators which processed all the oily waste water. Sanitary sewage was discharged into the City sewer system and was treated by the City of East Chicago. A Sour Water Stripper installation had been budgeted, for removing sulfides and ammonia from the refinery's catalytic cracker condensate. This paper will present Mobil's experiences in operating a Sour Water Stripper and an Air Flotation Unit. Results of water reuse in cooling towers will also be discussed. WASTE WATER QUALITY IMPROVEMENTS, 1965-1967 In February 1965, the Sour Water Stripper was put into service, producing dramatic results. The API Separator effluent water's visual appearance was greatly improved by the complete elimination of a black precipitate which the sulfides had caused. The Sour Water Stripper Bottoms was of excellent quality, containing essentially no sulfide and only 15 mg/1 of ammonia-nitrogen. Reuse of the Sour Water Stripper Bottoms as Desalter wash water achieved a reduction of 90 per cent in phenol content. These operations, plus several improvements in housekeeping practices, resulted in the following improvements in API Separator effluent quality, compared with that shown by the 1963 GLIRB Survey: Per Cent Pollutant Reduction Sulfides 99.9 Ammonia-Nitrogen 95.0 Phenols 91.0 BOD 43.0 To maintain consistent waste water quality, it is necessary that the Sour Water Stripper operate essentially 100 per cent of the time, while the catalytic cracker is on stream. Figure 1 shows a simplified flow diagram of the Stripper and the locations of -406-
Object Description
Purdue Identification Number | ETRIWC197041 |
Title | Air flotation treatment and reuse of refinery wastewater |
Author | Hart, James A. |
Date of Original | 1970 |
Conference Title | Proceedings of the 25th Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://earchives.lib.purdue.edu/u?/engext,18196 |
Extent of Original | p. 406-413 |
Series | Engineering extension series no. 137 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital object copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Date Digitized | 2009-06-09 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page406 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital object copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Transcript | Air Flotation Treatment and Reuse of Refinery Wastewater JAMES A. HART, Conservation Specialist Mobil Oil Corporation East Chicago Refinery East Chicago, Indiana INTRODUCTION Mobil Oil Corporation's East Chicago Refinery is located on the Indiana Harbor Ship Canal, which discharges into Lake Michigan. The Great Lakes-Illinois River Basin Survey (GLIRB) made by the Health, Education, and Welfare Department in 1963, indicated a need for improving the quality of waste waters discharged into this Canal. At that time Mobil's waste treatment facilities consisted of two ballast water settling tanks and two parallel API Separators which processed all the oily waste water. Sanitary sewage was discharged into the City sewer system and was treated by the City of East Chicago. A Sour Water Stripper installation had been budgeted, for removing sulfides and ammonia from the refinery's catalytic cracker condensate. This paper will present Mobil's experiences in operating a Sour Water Stripper and an Air Flotation Unit. Results of water reuse in cooling towers will also be discussed. WASTE WATER QUALITY IMPROVEMENTS, 1965-1967 In February 1965, the Sour Water Stripper was put into service, producing dramatic results. The API Separator effluent water's visual appearance was greatly improved by the complete elimination of a black precipitate which the sulfides had caused. The Sour Water Stripper Bottoms was of excellent quality, containing essentially no sulfide and only 15 mg/1 of ammonia-nitrogen. Reuse of the Sour Water Stripper Bottoms as Desalter wash water achieved a reduction of 90 per cent in phenol content. These operations, plus several improvements in housekeeping practices, resulted in the following improvements in API Separator effluent quality, compared with that shown by the 1963 GLIRB Survey: Per Cent Pollutant Reduction Sulfides 99.9 Ammonia-Nitrogen 95.0 Phenols 91.0 BOD 43.0 To maintain consistent waste water quality, it is necessary that the Sour Water Stripper operate essentially 100 per cent of the time, while the catalytic cracker is on stream. Figure 1 shows a simplified flow diagram of the Stripper and the locations of -406- |
Resolution | 300 ppi |
Color Depth | 8 bit |
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