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Section Six INDUSTRIAL WASTES A. PHARMACEUTICAL 57 START-UP OF THE BIOLOGICAL NITRIFICATION PROCESS FOR THE FERMENTATION WASTEWATER TREATMENT PLANT AT ELI LILLY AND COMPANY Lisa M. Pantea, Environmental Engineer Eli Lilly and Company Tippecanoe Laboratories Lafayette, Indiana INTRODUCTION A biological nitrification wastewater treatment plant has been designed and constructed to treat a wastewater from fermentation processes at Tippecanoe Laboratories, located in Lafayette, Indiana. The driving force in the project was the need to remove ammonia in this particular wastestream. There are three wastestreams from the plantsite, all combining at the outfall to total 12 MGD. The major ammonia load is from the fermentation production wastestream; hence, the ammonia reduction was targeted for the fermentation wastewater treatment plant. The current NPDES permit has a 2000 pounds/day daily average limit of ammonia at the outfall. The proposed limit in the permit, expected to be issued late in 1993, is likely to be significantly less than the current limit. The pre-existing treatment plant could not meet the proposed limit; hence the nitrification process was pursued and has been implemented. Construction of the nitrification plant started in spring of 1990 and was completed in the fall of 1991. The nitrification process started up in the fourth quarter of 1991 and has been in operation since that time. This chapter will describe the basic treatment process, the seeding scale-up process that occurred before full scale start-up, first year performance of the treatment process, operational issues confronted during the first year of operation, and a brief summary of denitrification start-up in March, 1993. PROCESS FLOW AND DESIGN CRITERIA The nitrification process was designed and installed within a pre-existing activated sludge process. The old treatment plant consisted of an equalization basin, five aeration basins in series, intermediate clarification, followed by additional aeration basins with final clarifiers. The nitrification process replaced the second set of aeration basins in the process flow. A flow diagram incorporating the new nitrification facility into the old activated sludge system is shown in Figure 1. The nitrification design begins with temperature reduction of the incoming wastewater using plate and frame heat exchangers and a closed-loop cooling tower. The pre-existing activated sludge system operates in the thermophilic range, with waste temperatures of 120-130°F. During feasibility studies done at Purdue University, it was found that biological nitrification could not be successfully operated in this temperature range. Therefore, design criteria included temperature reduction to 75°F. Basic design criteria is listed in Table I. Loading conditions vary greatly with production schedules, and fluctuations are common due to batch scheduling. Equalization greatly benefits the process, but does not totally eliminate daily variability. BIOLOGICAL SEEDING PROCESS The seeding process began in July, 1991, utilizing approximately one liter of mixed liquor from the pilot reactors that had been running at Purdue University. This bacterial population had been accli- 48th Purdue Industrial Waste Conference Proceedings, 1993 Lewis Publishers, Chelsea, Michigan 48118. Printed in U.S.A. 569
Object Description
Purdue Identification Number | ETRIWC199357 |
Title | Start-up of the biological nitrification process for the fermentation wastewater treatment plant at Eli Lilly and Company |
Author | Pantea, Lisa M. |
Date of Original | 1993 |
Conference Title | Proceedings of the 48th Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://earchives.lib.purdue.edu/u?/engext,21159 |
Extent of Original | p. 569-576 |
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 | 2009-11-10 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 569 |
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 | Section Six INDUSTRIAL WASTES A. PHARMACEUTICAL 57 START-UP OF THE BIOLOGICAL NITRIFICATION PROCESS FOR THE FERMENTATION WASTEWATER TREATMENT PLANT AT ELI LILLY AND COMPANY Lisa M. Pantea, Environmental Engineer Eli Lilly and Company Tippecanoe Laboratories Lafayette, Indiana INTRODUCTION A biological nitrification wastewater treatment plant has been designed and constructed to treat a wastewater from fermentation processes at Tippecanoe Laboratories, located in Lafayette, Indiana. The driving force in the project was the need to remove ammonia in this particular wastestream. There are three wastestreams from the plantsite, all combining at the outfall to total 12 MGD. The major ammonia load is from the fermentation production wastestream; hence, the ammonia reduction was targeted for the fermentation wastewater treatment plant. The current NPDES permit has a 2000 pounds/day daily average limit of ammonia at the outfall. The proposed limit in the permit, expected to be issued late in 1993, is likely to be significantly less than the current limit. The pre-existing treatment plant could not meet the proposed limit; hence the nitrification process was pursued and has been implemented. Construction of the nitrification plant started in spring of 1990 and was completed in the fall of 1991. The nitrification process started up in the fourth quarter of 1991 and has been in operation since that time. This chapter will describe the basic treatment process, the seeding scale-up process that occurred before full scale start-up, first year performance of the treatment process, operational issues confronted during the first year of operation, and a brief summary of denitrification start-up in March, 1993. PROCESS FLOW AND DESIGN CRITERIA The nitrification process was designed and installed within a pre-existing activated sludge process. The old treatment plant consisted of an equalization basin, five aeration basins in series, intermediate clarification, followed by additional aeration basins with final clarifiers. The nitrification process replaced the second set of aeration basins in the process flow. A flow diagram incorporating the new nitrification facility into the old activated sludge system is shown in Figure 1. The nitrification design begins with temperature reduction of the incoming wastewater using plate and frame heat exchangers and a closed-loop cooling tower. The pre-existing activated sludge system operates in the thermophilic range, with waste temperatures of 120-130°F. During feasibility studies done at Purdue University, it was found that biological nitrification could not be successfully operated in this temperature range. Therefore, design criteria included temperature reduction to 75°F. Basic design criteria is listed in Table I. Loading conditions vary greatly with production schedules, and fluctuations are common due to batch scheduling. Equalization greatly benefits the process, but does not totally eliminate daily variability. BIOLOGICAL SEEDING PROCESS The seeding process began in July, 1991, utilizing approximately one liter of mixed liquor from the pilot reactors that had been running at Purdue University. This bacterial population had been accli- 48th Purdue Industrial Waste Conference Proceedings, 1993 Lewis Publishers, Chelsea, Michigan 48118. Printed in U.S.A. 569 |
Resolution | 300 ppi |
Color Depth | 8 bit |
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