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Industrial Waste Treatment at Trans World Airlines Overhaul Base GEORGE C. HIGGINS, Project Engineer Burns and McDonnell Engineering Company Kansas City, Missouri 64141 INTRODUCTION From the first day of operation, the personnel of Trans World Airlines overhaul complex, located at Mid-Continent International Airport, havebeen faced with the task of providing adequate treatment for the industrial waste from this installation. In the beginning, the wastes requiring treatment were: 1) that from a plating shop consisting of cyanide and chrome streams, and 2) that from aircraft maintenance. As the site continued to expand, the quantity and type of wastes increased. The increase in petroleum waste from the engine overhaul process necessitated a previous treatment plant expansion to treat this waste. Presently, additional capacity is under construction to provide treatment for the plating shop expansion, new hangar facilities and increased fleet size. The new facilities will be adequate until the jumbo jet and supersonic planes enter the fleet. Besides the preceding factors necessitating additional treatment capacity, an additional item suggesting a need for an increase was Trans World Airlines desire to provide an acceptable effluent -- one that will meet the stream quality standards which regulatory agencies are proposing. At present there are four distinct waste streams requiring treatment from the industrial complex which comprises and overhaul facility. The streams are 1) alkaline-cyanide, 2) acid-chrome, 3) industrial-petroleum, and 4) sanitary; however, only the first three will be discussed. The existing treatment facilities are located in the same vicinity with the controls housed in two interconnecting buildings adjacent to the treatment units. However, there is a distinct line of demarcation between the two areas where wastes are being treated. The metal finishing wastes are centered at the south end of the site with the petroleum wastes located at the north end. METAL FINISHING WASTES The plating wastes originate in the plating shop area of the engine overhaul building. Complete stripping and plating operations for the aircraft's components and engines are carried out here which give rise to two entirely different and complex waste streams. One is the alkaline stream containing all cyanide and alkaline wastes. The other is the acid stream containing all chrome, acids and other heavy metal wastes. Each waste as it reaches the plant enters a retention basin which acts as a flow and concentration equalization basin. The waste is then pumped from these units at a constant rate to the process basins (Figure 1). The cyanide bearing waste is destroyed by the alkaline-chlorination process which oxidizes the cyanide to carbon dioxide and nitrogen. Liquid caustic soda and chlorine are the chemicals used. The chemicals are first added to the waste in the two-minute basin in a ratio of 7 lbs of chlorine for each lb of free cyanide (CN~) and 1.25 lb of caustic soda per lb of chlorine. From here the waste overflows into the two-hour basin where additional chlorine and caustic soda are added to complete the cyanide oxidation. Part of the effluent from the two-hour basin - 194 -
Object Description
Purdue Identification Number | ETRIWC196718 |
Title | Industrial waste treatment at Trans World Airlines overhaul base |
Author | Higgins, George C. |
Date of Original | 1967 |
Conference Title | Proceedings of the 22nd Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://earchives.lib.purdue.edu/u?/engext,14179 |
Extent of Original | p. 194-202 |
Series |
Engineering extension series no. 129 Engineering bulletin v. 52, no. 3 |
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 | 2009-05-20 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 194 |
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 | Industrial Waste Treatment at Trans World Airlines Overhaul Base GEORGE C. HIGGINS, Project Engineer Burns and McDonnell Engineering Company Kansas City, Missouri 64141 INTRODUCTION From the first day of operation, the personnel of Trans World Airlines overhaul complex, located at Mid-Continent International Airport, havebeen faced with the task of providing adequate treatment for the industrial waste from this installation. In the beginning, the wastes requiring treatment were: 1) that from a plating shop consisting of cyanide and chrome streams, and 2) that from aircraft maintenance. As the site continued to expand, the quantity and type of wastes increased. The increase in petroleum waste from the engine overhaul process necessitated a previous treatment plant expansion to treat this waste. Presently, additional capacity is under construction to provide treatment for the plating shop expansion, new hangar facilities and increased fleet size. The new facilities will be adequate until the jumbo jet and supersonic planes enter the fleet. Besides the preceding factors necessitating additional treatment capacity, an additional item suggesting a need for an increase was Trans World Airlines desire to provide an acceptable effluent -- one that will meet the stream quality standards which regulatory agencies are proposing. At present there are four distinct waste streams requiring treatment from the industrial complex which comprises and overhaul facility. The streams are 1) alkaline-cyanide, 2) acid-chrome, 3) industrial-petroleum, and 4) sanitary; however, only the first three will be discussed. The existing treatment facilities are located in the same vicinity with the controls housed in two interconnecting buildings adjacent to the treatment units. However, there is a distinct line of demarcation between the two areas where wastes are being treated. The metal finishing wastes are centered at the south end of the site with the petroleum wastes located at the north end. METAL FINISHING WASTES The plating wastes originate in the plating shop area of the engine overhaul building. Complete stripping and plating operations for the aircraft's components and engines are carried out here which give rise to two entirely different and complex waste streams. One is the alkaline stream containing all cyanide and alkaline wastes. The other is the acid stream containing all chrome, acids and other heavy metal wastes. Each waste as it reaches the plant enters a retention basin which acts as a flow and concentration equalization basin. The waste is then pumped from these units at a constant rate to the process basins (Figure 1). The cyanide bearing waste is destroyed by the alkaline-chlorination process which oxidizes the cyanide to carbon dioxide and nitrogen. Liquid caustic soda and chlorine are the chemicals used. The chemicals are first added to the waste in the two-minute basin in a ratio of 7 lbs of chlorine for each lb of free cyanide (CN~) and 1.25 lb of caustic soda per lb of chlorine. From here the waste overflows into the two-hour basin where additional chlorine and caustic soda are added to complete the cyanide oxidation. Part of the effluent from the two-hour basin - 194 - |
Resolution | 300 ppi |
Color Depth | 8 bit |
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