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50 APPLICATION OF ANAEROBIC RESPIROMETERS FOR TREATABILITY ASSESSMENT OF INDUSTRIAL WASTEWATERS Nadim Reza Khandaker, Environmental Engineer ADI International Incorporated Fredericton NB Canada E3B 4YZ INTRODUCTION Before substantial time and money is spent in carrying out pilot scale or actual site work on a candidate wastewater, it is important to determine the potential for anaerobic biodegradation of the subject wastewater. Anaerobic respirometer can be used as a powerful tool to determine the anaerobic biodegradability of industrial wastewaters. The objective of this chapter is to report on case studies carried out by the author using anaerobic respirometer to determine the anaerobic treatability of industrial wastewaters. The treatability assessment was based on the anaerobic treatability screening protocol developed by Young.1 The treatability parameters investigated were the rate and extent of degradation, toxicity, and culture acclimation. TREATABILITY SCREENING PROTOCOL The screening protocol used in this study was based on the treatability assessment protocol developed by Young1 and reported at length in an earlier publication by Young and Khandaker.2 The treatability test program consisted of two test phases. Phase I consist of batch serum bottle tests, while Phase II involves the use of semicontinuous bench scale reactors. Master Culture Reactors (MCRs) were used to provide cultures having identifiable and repeatable characteristics so that measurements made at different times and with different sets of tests would have a common microbial and biochemical basis. Master Culture Reactors The Master Culture Reactors used in this study received ethanol at a loading rate of 1 g COD/L-d augmented with nutrient minerals and buffer as substrate. The reactors were operated at a continuous batch mode at the temperature of 35°C. The hydraulic and solids retention time of the MCRs were fixed at 20 days. Details regarding MCR operation and feed formulation have been reported by Young and Khandaker1-2-3 in earlier publications. Analytical Procedures Gas production from each test reactor was measured automatically by using an anaerobic respirometer (Challenge ANR-200).3 The pH of the culture was measured by using a Fisher Scientific Accumet 425 Digital pH/ion meter. Chemical Oxygen Demand (COD) and sulfate content were measured using Hach methods.4 Volatile suspended solids (VSS) were measured using glass fiber filters according to procedures described by Standard Methods.5 Phase I Batch Tests Batch serum bottle tests are the anaerobic counterparts to aerobic respirometer tests. Tests are initiated by transferring active cultures from MCRs under anaerobic conditions to serum bottles. 51st Purdue Industrial Waste Conference Proceedings, 1996. Ann Arbor Press, Inc., Chelsea, Michigan 48118. Printed in U.S.A. 483
Object Description
Purdue Identification Number | ETRIWC199650 |
Title | Application of anaerobic respirometers for treatability assessment of industrial wastewaters |
Author | Khandaker, Nadim Reza |
Date of Original | 1996 |
Conference Title | Proceedings of the 51st Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://e-archives.lib.purdue.edu/u?/engext,46351 |
Extent of Original | p. 483-488 |
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 | 2009-10-27 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 483 |
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 | 50 APPLICATION OF ANAEROBIC RESPIROMETERS FOR TREATABILITY ASSESSMENT OF INDUSTRIAL WASTEWATERS Nadim Reza Khandaker, Environmental Engineer ADI International Incorporated Fredericton NB Canada E3B 4YZ INTRODUCTION Before substantial time and money is spent in carrying out pilot scale or actual site work on a candidate wastewater, it is important to determine the potential for anaerobic biodegradation of the subject wastewater. Anaerobic respirometer can be used as a powerful tool to determine the anaerobic biodegradability of industrial wastewaters. The objective of this chapter is to report on case studies carried out by the author using anaerobic respirometer to determine the anaerobic treatability of industrial wastewaters. The treatability assessment was based on the anaerobic treatability screening protocol developed by Young.1 The treatability parameters investigated were the rate and extent of degradation, toxicity, and culture acclimation. TREATABILITY SCREENING PROTOCOL The screening protocol used in this study was based on the treatability assessment protocol developed by Young1 and reported at length in an earlier publication by Young and Khandaker.2 The treatability test program consisted of two test phases. Phase I consist of batch serum bottle tests, while Phase II involves the use of semicontinuous bench scale reactors. Master Culture Reactors (MCRs) were used to provide cultures having identifiable and repeatable characteristics so that measurements made at different times and with different sets of tests would have a common microbial and biochemical basis. Master Culture Reactors The Master Culture Reactors used in this study received ethanol at a loading rate of 1 g COD/L-d augmented with nutrient minerals and buffer as substrate. The reactors were operated at a continuous batch mode at the temperature of 35°C. The hydraulic and solids retention time of the MCRs were fixed at 20 days. Details regarding MCR operation and feed formulation have been reported by Young and Khandaker1-2-3 in earlier publications. Analytical Procedures Gas production from each test reactor was measured automatically by using an anaerobic respirometer (Challenge ANR-200).3 The pH of the culture was measured by using a Fisher Scientific Accumet 425 Digital pH/ion meter. Chemical Oxygen Demand (COD) and sulfate content were measured using Hach methods.4 Volatile suspended solids (VSS) were measured using glass fiber filters according to procedures described by Standard Methods.5 Phase I Batch Tests Batch serum bottle tests are the anaerobic counterparts to aerobic respirometer tests. Tests are initiated by transferring active cultures from MCRs under anaerobic conditions to serum bottles. 51st Purdue Industrial Waste Conference Proceedings, 1996. Ann Arbor Press, Inc., Chelsea, Michigan 48118. Printed in U.S.A. 483 |
Resolution | 300 ppi |
Color Depth | 8 bit |
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