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Section Four
PROCESSES
F. NITRIFICATION/DENITRIFICATION
49 THE EFFECT OF INHIBITORY COMPOUNDS ON
BIOLOGICAL NITRIFICATION
Lisa Pantea-Kiser, Process Engineer
Foth & Van Dyke and Associates, Inc.
Green Bay, Wisconsin 54307
Ronald F. Wukasch, Professor
James E. Alleman, Professor
School of Civil Engineering
Purdue University
West Lafayette, Indiana 47907
INTRODUCTION
The stability of a biological nitrification system in a wastewater treatment plant is often challenged
by incoming toxic chemicals. In this research, the inhibition of nitrification by 12 chemicals was
studied. Using an enrichment culture of nitrifying organisms in batch respirometric tests, an IC50
value, defined as the concentration of test chemical at which the respiration rate is 50% of a control
respiration rate, was generated for the following compounds:
• Pyridine
• 2-methylpyridine
• 4-methylpyridine
• 2-chloropyridine
• 2-chloro-6-trichloromethylpyridine
• phenol
• 2,4,6-trichlorophenol
• pentachlorophenol
• orthocresol
• parachlorometacresol
• 4,6-dinitro-o-cresol
• cyanide
BACKGROUND
The City of Indianapolis, Indiana operates two Advanced Wastewater Treatment (AWT) facilities,
the Belmont and Southport plants. These plants currently treat about 150 MGD of wastewater
produced by the citizens and industries of Marion County, Indiana. The unit operations include
primary treatment, biological roughing towers, oxygen nitrification systems (ONS), multi-media
gravity filters, and ozone disinfection.1 These Advanced Wastewater Treatment plants are required to
meet the effluent guidelines for ammonia-nitrogen shown in Table L
Since the start-up of the Indianapolis AWT facility, total or partial inhibition of the nitrification
process has been experienced. These periods of inhibition have resulted in temporary non-compliance
with the City's NPDES permit effluent ammonia limitations. Evaluation of plant performance ruled
out improper operation and/or design of the facilities as the cause of the inhibition and suggested that
44th Purdue Industrial Waste Conference Proceedings, © 1990 Lewis Publishers, Inc., Chelsea, Michigan 48118.
Printed in U.S.A.
465
Object Description
| Purdue Identification Number | ETRIWC198949 |
| Title | Effect of inhibitory compounds on biological nitrification |
| Author |
Pantea-Kiser, Lisa M. Wukasch, Ronald F. Alleman, James E. |
| Date of Original | 1989 |
| Conference Title | Proceedings of the 44th Industrial Waste Conference |
| Conference Front Matter (copy and paste) | http://e-archives.lib.purdue.edu/u?/engext,40757 |
| Extent of Original | p. 465-474 |
| 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 | 2009-08-20 |
| Capture Device | Fujitsu fi-5650C |
| Capture Details | ScandAll 21 |
| Resolution | 300 ppi |
| Color Depth | 8 bit |
Description
| Title | page 465 |
| 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 Four PROCESSES F. NITRIFICATION/DENITRIFICATION 49 THE EFFECT OF INHIBITORY COMPOUNDS ON BIOLOGICAL NITRIFICATION Lisa Pantea-Kiser, Process Engineer Foth & Van Dyke and Associates, Inc. Green Bay, Wisconsin 54307 Ronald F. Wukasch, Professor James E. Alleman, Professor School of Civil Engineering Purdue University West Lafayette, Indiana 47907 INTRODUCTION The stability of a biological nitrification system in a wastewater treatment plant is often challenged by incoming toxic chemicals. In this research, the inhibition of nitrification by 12 chemicals was studied. Using an enrichment culture of nitrifying organisms in batch respirometric tests, an IC50 value, defined as the concentration of test chemical at which the respiration rate is 50% of a control respiration rate, was generated for the following compounds: • Pyridine • 2-methylpyridine • 4-methylpyridine • 2-chloropyridine • 2-chloro-6-trichloromethylpyridine • phenol • 2,4,6-trichlorophenol • pentachlorophenol • orthocresol • parachlorometacresol • 4,6-dinitro-o-cresol • cyanide BACKGROUND The City of Indianapolis, Indiana operates two Advanced Wastewater Treatment (AWT) facilities, the Belmont and Southport plants. These plants currently treat about 150 MGD of wastewater produced by the citizens and industries of Marion County, Indiana. The unit operations include primary treatment, biological roughing towers, oxygen nitrification systems (ONS), multi-media gravity filters, and ozone disinfection.1 These Advanced Wastewater Treatment plants are required to meet the effluent guidelines for ammonia-nitrogen shown in Table L Since the start-up of the Indianapolis AWT facility, total or partial inhibition of the nitrification process has been experienced. These periods of inhibition have resulted in temporary non-compliance with the City's NPDES permit effluent ammonia limitations. Evaluation of plant performance ruled out improper operation and/or design of the facilities as the cause of the inhibition and suggested that 44th Purdue Industrial Waste Conference Proceedings, © 1990 Lewis Publishers, Inc., Chelsea, Michigan 48118. Printed in U.S.A. 465 |
| Resolution | 300 ppi |
| Color Depth | 8 bit |
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