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Section 10. PLATING WASTES WASTEWATER TREATMENT FOR A SMALL CHROME PLATING SHOP: A CASE HISTORY Joseph G. Rabosky, Consulting Engineer Coraopolis, Pennsylvania 15108 Timothy Altares, Jr., Plant Manager Paul's Chrome Plating, Inc. Mars, Pennsylvania 16046 INTRODUCTION Paul's Chrome Plating, Inc., is a small chrome plating shop located south of the small town of Mars in western Pennsylvania. The shop specializes in reconditioning and plating small parts of motorcycles, specialty automobile parts, and other miscellaneous metallic items. The shop opened for business during the winter of 1978 and was cited for operating without a discharge permit one month later. Determining the proper design approach for wastewater treatment required consideration of both economic and technical assessments. Economic considerations were necessary because the business was new and the owner deeply in debt. A technical assessment was required because: (1) the owner had limited knowledge of wastewater treatment practices; (2) the wastewaters contained many of the contaminants characteristic of chrome plating operations; and (3) the system design constraints required minimization of both treatment time and frequency. Originally, the shop involved three people; however, employed personnel now number about fifteen to twenty because business activities have substantially increased. These employees perform tasks both directly involved in the production operations; e.g., buffing, grinding, and electroplating, and in support functions such as secretarial and bookkeeping. Normal daily production operations involve crude cleaning of parts with a water spray, immersion of these parts into acid followed by alkaline solutions, and then electroplating by parts immersion into copper, nickel, and chromium solutions to provide the desired metallic coating. Each cleaning or coating operation is followed by parts immersion into a rinse tank to remove localized quantities of chemical solutions. The tanks containing the concentrated plating solutions are never dumped; therefore, treatment of only dilute aqueous wastes is required. All sanitary, drinking, and industrial water at the facility is obtained from an on-site well. Sanitary sewage is collected and treated in a septic tank. The area of the shop in which nonsanitary aqueous wastes are produced is the cleaning and electrolytic plating section which is segregated into two lines—chrome/nickel and copper. DESCRIPTION OF ORIGINAL OPERATION The wastewaters generated by each plating line were segregated because their respective tanks were set in concrete pits. Therefore, all overflows, drippings, and rinse waters from each plating line were collected in their respective concrete pits and were drained individually and combined in a lagoon. The lagoon effluent was then discharged to Breakneck Creek, which is a tributary of Connoquenessing Creek. Several miles downstream, Connoquenessing Creek flows into the Ohio River. Figure 1 depicts the original wastewater generation and flow scheme. 449
Object Description
Purdue Identification Number | ETRIWC198347 |
Title | Wastewater treatment for a small chrome plating shop : a case history |
Author |
Rabosky, Joseph G. Altares, Timothy |
Date of Original | 1983 |
Conference Title | Proceedings of the 38th Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://e-archives.lib.purdue.edu/u?/engext,34749 |
Extent of Original | p. 449-456 |
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 | 2009-07-28 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 449 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Transcript | Section 10. PLATING WASTES WASTEWATER TREATMENT FOR A SMALL CHROME PLATING SHOP: A CASE HISTORY Joseph G. Rabosky, Consulting Engineer Coraopolis, Pennsylvania 15108 Timothy Altares, Jr., Plant Manager Paul's Chrome Plating, Inc. Mars, Pennsylvania 16046 INTRODUCTION Paul's Chrome Plating, Inc., is a small chrome plating shop located south of the small town of Mars in western Pennsylvania. The shop specializes in reconditioning and plating small parts of motorcycles, specialty automobile parts, and other miscellaneous metallic items. The shop opened for business during the winter of 1978 and was cited for operating without a discharge permit one month later. Determining the proper design approach for wastewater treatment required consideration of both economic and technical assessments. Economic considerations were necessary because the business was new and the owner deeply in debt. A technical assessment was required because: (1) the owner had limited knowledge of wastewater treatment practices; (2) the wastewaters contained many of the contaminants characteristic of chrome plating operations; and (3) the system design constraints required minimization of both treatment time and frequency. Originally, the shop involved three people; however, employed personnel now number about fifteen to twenty because business activities have substantially increased. These employees perform tasks both directly involved in the production operations; e.g., buffing, grinding, and electroplating, and in support functions such as secretarial and bookkeeping. Normal daily production operations involve crude cleaning of parts with a water spray, immersion of these parts into acid followed by alkaline solutions, and then electroplating by parts immersion into copper, nickel, and chromium solutions to provide the desired metallic coating. Each cleaning or coating operation is followed by parts immersion into a rinse tank to remove localized quantities of chemical solutions. The tanks containing the concentrated plating solutions are never dumped; therefore, treatment of only dilute aqueous wastes is required. All sanitary, drinking, and industrial water at the facility is obtained from an on-site well. Sanitary sewage is collected and treated in a septic tank. The area of the shop in which nonsanitary aqueous wastes are produced is the cleaning and electrolytic plating section which is segregated into two lines—chrome/nickel and copper. DESCRIPTION OF ORIGINAL OPERATION The wastewaters generated by each plating line were segregated because their respective tanks were set in concrete pits. Therefore, all overflows, drippings, and rinse waters from each plating line were collected in their respective concrete pits and were drained individually and combined in a lagoon. The lagoon effluent was then discharged to Breakneck Creek, which is a tributary of Connoquenessing Creek. Several miles downstream, Connoquenessing Creek flows into the Ohio River. Figure 1 depicts the original wastewater generation and flow scheme. 449 |
Resolution | 300 ppi |
Color Depth | 8 bit |
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