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A PILOT STUDY FOR THE REMOVAL OF PRIORITY POLLUTANTS BY THE PACT PROCESS J. W. Cormack, Associate D. Y. Hsu, Process Engineer Greeley and Hansen Engineers Chicago, Illinois 60606 and G. Simms, Wastewater Superintendent Department of Public Works Kalamazoo, Michigan 49007 INTRODUCTION Federal regulation 40 CRF 403 requires publicly owned treatment works (POTWs) receiving wastewater flow in excess of 5 MGD to implement an industrial pretreatment program no later than July 1, 1983. One of the essential parts of such a program is to determine the maximum allowable concentration of various pollutants in industrial discharged to the POTW. The POTW in the City of Kalamazoo, Michigan, is currently being renovated and expanded to convert the existing activated sludge process to a powdered carbon activated sludge (PACT) plant with an annual design flow of 53.3 MGD. As the new plant will not be on line until 1985, pilot studies were conducted to provide information as to the expected performance of the full scale plant. A pilot study concerned with the removal of conventional pollutants (BOD and suspended solids) and nitrification had been conducted previously for the development of the design parameters for the full scale PACT plant [1]. The study to be discussed herein is related to the priority pollutants identified in the Industrial Pretreatment Regulations [2]. It was conducted to determine the plant tolerance limit and the removal efficiency for the priority pollutants found in the plant influent. The tolerance limit is needed to determine the concentration at which those pollutants would interfere with the performance of the PACT plant. The removal efficiency is needed to determine the maximum influent concentrations at which the plant effluent will comply with the applicable water quality standards. The plant performance, for the purpose of this study, is described in terms of the removal of BOD, COD, SS, and phosphorous, nitrification, and the settling characteristics of the mixed liquor. THE PILOT PLANT Figure 1 shows the process diagram for the pilot unit. The main part of this system is a Biospheric Model 61 pilot plant. It has a nominal capacity of 10 gph and is equipped with one 20-inch diameter primary clarifier, one 20-inch diameter final clarifier, and six 8-inch diameter plexiglass aeration cylinders. For the purpose of this study, the primary clarifier was used as a mixing tank for preparing the plant influent. The main advantage of this type of pilot plant is its flexibility. The six aeration cylinders can be arranged in various ways to simulate the flow regime and step mode for the full scale plant. In this study, the aeration cylinders were connected in series to simulate the plug flow regime designed for the full scale plant. After the full scale plant is operational, consideration may be given to operating the plant with a different flow regime or step mode. In this case the pilot plant can be used to predict the 403
Object Description
Purdue Identification Number | ETRIWC198342 |
Title | Pilot study for the removal of priority pollutants by the PACT process |
Author |
Cormack, J. W. Hsu, D. Y. (Deh Yuan) Simms, R. G. |
Date of Original | 1983 |
Conference Title | Proceedings of the 38th Industrial Waste Conference |
Extent of Original | p. 403-416 |
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 403 |
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 | A PILOT STUDY FOR THE REMOVAL OF PRIORITY POLLUTANTS BY THE PACT PROCESS J. W. Cormack, Associate D. Y. Hsu, Process Engineer Greeley and Hansen Engineers Chicago, Illinois 60606 and G. Simms, Wastewater Superintendent Department of Public Works Kalamazoo, Michigan 49007 INTRODUCTION Federal regulation 40 CRF 403 requires publicly owned treatment works (POTWs) receiving wastewater flow in excess of 5 MGD to implement an industrial pretreatment program no later than July 1, 1983. One of the essential parts of such a program is to determine the maximum allowable concentration of various pollutants in industrial discharged to the POTW. The POTW in the City of Kalamazoo, Michigan, is currently being renovated and expanded to convert the existing activated sludge process to a powdered carbon activated sludge (PACT) plant with an annual design flow of 53.3 MGD. As the new plant will not be on line until 1985, pilot studies were conducted to provide information as to the expected performance of the full scale plant. A pilot study concerned with the removal of conventional pollutants (BOD and suspended solids) and nitrification had been conducted previously for the development of the design parameters for the full scale PACT plant [1]. The study to be discussed herein is related to the priority pollutants identified in the Industrial Pretreatment Regulations [2]. It was conducted to determine the plant tolerance limit and the removal efficiency for the priority pollutants found in the plant influent. The tolerance limit is needed to determine the concentration at which those pollutants would interfere with the performance of the PACT plant. The removal efficiency is needed to determine the maximum influent concentrations at which the plant effluent will comply with the applicable water quality standards. The plant performance, for the purpose of this study, is described in terms of the removal of BOD, COD, SS, and phosphorous, nitrification, and the settling characteristics of the mixed liquor. THE PILOT PLANT Figure 1 shows the process diagram for the pilot unit. The main part of this system is a Biospheric Model 61 pilot plant. It has a nominal capacity of 10 gph and is equipped with one 20-inch diameter primary clarifier, one 20-inch diameter final clarifier, and six 8-inch diameter plexiglass aeration cylinders. For the purpose of this study, the primary clarifier was used as a mixing tank for preparing the plant influent. The main advantage of this type of pilot plant is its flexibility. The six aeration cylinders can be arranged in various ways to simulate the flow regime and step mode for the full scale plant. In this study, the aeration cylinders were connected in series to simulate the plug flow regime designed for the full scale plant. After the full scale plant is operational, consideration may be given to operating the plant with a different flow regime or step mode. In this case the pilot plant can be used to predict the 403 |
Resolution | 300 ppi |
Color Depth | 8 bit |
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