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83 DEVELOPMENT OF DESIGN CRITERIA FOR TREATMENT OF METAL-CONTAINING WASTEWATERS AT OAK RIDGE NATIONAL LABORATORY George C. Patrick, Project Manager Melvin R. Hockenbury, Vice-President Engineering-Science, Inc. Fairfax, Virginia 22030 Warren T. Thompson, Project Engineer John M. Begavich, Development Engineer Martin Marietta Energy Systems Oak Ridge, Tennessee 37831 INTRODUCTION A nonradiological wastewater treatment project was initiated to establish a treatment facility for wastewaters generated at the Department of Energy's Oak Ridge National Laboratory (ORNL) in Oak Ridge, Tennessee. The project was divided into four phases. This paper discusses only the work associated with the first phase, wastewater characterization and treatability testing, which was conducted in 1985. The second phase which includes detailed design was performed in 1986. Construction is expected to begin in late 1987 with start-up expected to begin in 1989. Specifically, this paper discusses only the work associated with characterization and treatability testing of the wastewaters for heavy metal removal. An overview of all the wastewater treatability tests including those which evaluated air stripping and carbon adsorption for removal of organic compounds has been reported by others.1 WASTEWATER CHARACTERISTICS The wastewater treatment plant provides treatment of wastes from a variety of sources. These sources include drainage from the various laboratories (chemical, physics, electronics, biological, environmental and metallurgical); process wastewaters pretreated for radionuclides removal; boiler blowdown from the stream plant; and aqueous streams from several radiochemical processing plants and reactor operations. Analysis of the processes' wastewater showed that the heavy metals of concern included cadmium, chromium, copper, lead, nickel, silver, zinc, and mercury. The source of these metals was corrosion of the sewer pipes, metals used in the various laboratory reactions, and the small-scale plating shops. Because large-scale plating or metal finishing is not performed at the Oak Ridge National Laboratory, the metals concentration of wastewater was considered to be low. Eight wastestreams were identified as contributing to the wastewater discharge at the Oak Ridge National Laboratory. The characterization data of these wastewaters as well as the composite wastes- tream are shown in Table 1.2 The values shown in Table I are maximum concentrations. In general, the average concentrations were much lower. The composite sample had a concentration of less than 1 mg/L (1000 /ig/L) for each of the metals tested. At the time that treatability tests were being conducted, the discharge requirements for the treatment system were not known. However, the discharge limitations for DOE's Y-12 facility located adjacent to the Oak Ridge National Laboratory had recently been established and so these limitations were used as a guideline for the treatability tests. The Y-12 limitations, as well as the primary drinking water standards concentrations, are shown in Table II. The Y-12 permit limitations for all the metals except iron, as shown in Table II, were between 0.1 to 1.0 mg/L. The maximum metals concentrations of the ORNL composite were slightly higher than the Y-12 limitations. Since some of the wastestreams, specifically wastestream 3544, could probably be bypassed around the metal treatment facility, the composite wastestream to be treated would have a higher concentration for each metal. The 3544 wastestream could bypass the treatment facility 819
Object Description
Purdue Identification Number | ETRIWC198783 |
Title | Development of design criteria for treatment of metal-containing wastewaters at Oak Ridge National Laboratory |
Author |
Patrick, George C. Hockenbury, Melvin Richard Thompson, Warren T. Begavich, John M. |
Date of Original | 1987 |
Conference Title | Proceedings of the 42nd Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://e-archives.lib.purdue.edu/u?/engext,38818 |
Extent of Original | p. 819-830 |
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 | 2009-08-03 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 819 |
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 | 83 DEVELOPMENT OF DESIGN CRITERIA FOR TREATMENT OF METAL-CONTAINING WASTEWATERS AT OAK RIDGE NATIONAL LABORATORY George C. Patrick, Project Manager Melvin R. Hockenbury, Vice-President Engineering-Science, Inc. Fairfax, Virginia 22030 Warren T. Thompson, Project Engineer John M. Begavich, Development Engineer Martin Marietta Energy Systems Oak Ridge, Tennessee 37831 INTRODUCTION A nonradiological wastewater treatment project was initiated to establish a treatment facility for wastewaters generated at the Department of Energy's Oak Ridge National Laboratory (ORNL) in Oak Ridge, Tennessee. The project was divided into four phases. This paper discusses only the work associated with the first phase, wastewater characterization and treatability testing, which was conducted in 1985. The second phase which includes detailed design was performed in 1986. Construction is expected to begin in late 1987 with start-up expected to begin in 1989. Specifically, this paper discusses only the work associated with characterization and treatability testing of the wastewaters for heavy metal removal. An overview of all the wastewater treatability tests including those which evaluated air stripping and carbon adsorption for removal of organic compounds has been reported by others.1 WASTEWATER CHARACTERISTICS The wastewater treatment plant provides treatment of wastes from a variety of sources. These sources include drainage from the various laboratories (chemical, physics, electronics, biological, environmental and metallurgical); process wastewaters pretreated for radionuclides removal; boiler blowdown from the stream plant; and aqueous streams from several radiochemical processing plants and reactor operations. Analysis of the processes' wastewater showed that the heavy metals of concern included cadmium, chromium, copper, lead, nickel, silver, zinc, and mercury. The source of these metals was corrosion of the sewer pipes, metals used in the various laboratory reactions, and the small-scale plating shops. Because large-scale plating or metal finishing is not performed at the Oak Ridge National Laboratory, the metals concentration of wastewater was considered to be low. Eight wastestreams were identified as contributing to the wastewater discharge at the Oak Ridge National Laboratory. The characterization data of these wastewaters as well as the composite wastes- tream are shown in Table 1.2 The values shown in Table I are maximum concentrations. In general, the average concentrations were much lower. The composite sample had a concentration of less than 1 mg/L (1000 /ig/L) for each of the metals tested. At the time that treatability tests were being conducted, the discharge requirements for the treatment system were not known. However, the discharge limitations for DOE's Y-12 facility located adjacent to the Oak Ridge National Laboratory had recently been established and so these limitations were used as a guideline for the treatability tests. The Y-12 limitations, as well as the primary drinking water standards concentrations, are shown in Table II. The Y-12 permit limitations for all the metals except iron, as shown in Table II, were between 0.1 to 1.0 mg/L. The maximum metals concentrations of the ORNL composite were slightly higher than the Y-12 limitations. Since some of the wastestreams, specifically wastestream 3544, could probably be bypassed around the metal treatment facility, the composite wastestream to be treated would have a higher concentration for each metal. The 3544 wastestream could bypass the treatment facility 819 |
Resolution | 300 ppi |
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