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Hydrogen Peroxide As A Supplemental Oxygen Source in Industrial Waste Treatment L. DONALD OCHS, Research Engineer PHILIP J. KELLER, Developmental Specialist J. VANCE WEATHERSPOON, Senior Engineer CLIFF BLICK, Senior Chemist E.L duPont de Nemours & Co., Inc. Wilmington, Delaware 19899 CHARLES A. COLE, Assistant Professor Pennsylvania State University Middletown, Pennsylvania 17057 INTRODUCTION Aerobic biological processes require some form of oxygenation or aeration to satisfy the metabolic requirements of the organisms. For instance, trickling filters make use of natural convective drafts to provide air for mass transfer of oxygen into the liquid phase and then into the solid phase, biological slime growth. Activated sludge processes, including the various modifications, use surface aerators, turbines, or diffusers to provide the air for mass transfer into the liquid and solid phase. The newer processes of activated sludge are using molecular oxygen instead of air. However, in all these cases, the problem of mass transfer of oxygen across a gas-liquid interface exists. In addition, the turbulence produced in the mixed liquor of activated sludge that is needed to obtain efficient oxygen transfer tends to shear the biological floe particles and make them more difficult to separate from the liquid. A substitute source of oxygen that can be intimately mixed with the water and organisms without need for gas-water contact operations is desirable. Supplementary oxygen sources for overloaded aeration systems need to be readily available to meet emergency or short-term needs. Hydrogen peroxide may meet these needs since it is an easily handled liquid source of oxygen that can be intimately mixed with the sewage mixed liquor at any point of turbulence. All that is needed is a drum of H202 with a metering pump or flowrator to start the addition of oxygen into the system. The objective of this work was to demonstrate that H202 could be used as a source of 02 for activated sludge treatment plants to solve several operational problems. LITERATURE REVIEW The use of H202 in waste treatment has only recently been disclosed in the literature. Chin and Hicks (1) reported that H202 could be used as a means of elevating dissolved oxygen (DO) concentration in the biochemical oxygen demand (BOD) procedure. Later they also studied the effects of H202 as the 02 source in pilot units (2). Young and Baumann (3) have also reported on the use of H202 to elevate the dissolved oxygen concentrations for oxygen uptake studies. Besides these applications, several full-scale problem solutions have been demonstrated. According to Shepherd, H202 has been used to treat sour water in refineries (4,5). One of the major applications has been the control of odor and corrosion due to H2S in sewer lines (4,5,6). This problem, 'which is prevalent in the warmer regions such as Florida, Texas, and California, can be treated by H202 more economically than other treatments such as chlorine, caustic, or ozone. Another major application is the use of H202 to control bulking sludge (6,7,8,9,10,11,12). This application was detailed by Dr. Keller at last year's conference. 447
Object Description
Purdue Identification Number | ETRIWC197339 |
Title | Hydrogen peroxide as a supplemental oxygen source in industrial waste treatment |
Author |
Ochs, L. Donald Keller, P. J. (Philip J.) Weatherspoon, J. Vance Blick, Cliff Cole, Charles A. |
Date of Original | 1973 |
Conference Title | Proceedings of the 28th Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://earchives.lib.purdue.edu/u?/engext,23197 |
Extent of Original | p. 447-453 |
Series | Engineering extension series no. 142 |
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 | 2009-06-02 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 447 |
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 | Hydrogen Peroxide As A Supplemental Oxygen Source in Industrial Waste Treatment L. DONALD OCHS, Research Engineer PHILIP J. KELLER, Developmental Specialist J. VANCE WEATHERSPOON, Senior Engineer CLIFF BLICK, Senior Chemist E.L duPont de Nemours & Co., Inc. Wilmington, Delaware 19899 CHARLES A. COLE, Assistant Professor Pennsylvania State University Middletown, Pennsylvania 17057 INTRODUCTION Aerobic biological processes require some form of oxygenation or aeration to satisfy the metabolic requirements of the organisms. For instance, trickling filters make use of natural convective drafts to provide air for mass transfer of oxygen into the liquid phase and then into the solid phase, biological slime growth. Activated sludge processes, including the various modifications, use surface aerators, turbines, or diffusers to provide the air for mass transfer into the liquid and solid phase. The newer processes of activated sludge are using molecular oxygen instead of air. However, in all these cases, the problem of mass transfer of oxygen across a gas-liquid interface exists. In addition, the turbulence produced in the mixed liquor of activated sludge that is needed to obtain efficient oxygen transfer tends to shear the biological floe particles and make them more difficult to separate from the liquid. A substitute source of oxygen that can be intimately mixed with the water and organisms without need for gas-water contact operations is desirable. Supplementary oxygen sources for overloaded aeration systems need to be readily available to meet emergency or short-term needs. Hydrogen peroxide may meet these needs since it is an easily handled liquid source of oxygen that can be intimately mixed with the sewage mixed liquor at any point of turbulence. All that is needed is a drum of H202 with a metering pump or flowrator to start the addition of oxygen into the system. The objective of this work was to demonstrate that H202 could be used as a source of 02 for activated sludge treatment plants to solve several operational problems. LITERATURE REVIEW The use of H202 in waste treatment has only recently been disclosed in the literature. Chin and Hicks (1) reported that H202 could be used as a means of elevating dissolved oxygen (DO) concentration in the biochemical oxygen demand (BOD) procedure. Later they also studied the effects of H202 as the 02 source in pilot units (2). Young and Baumann (3) have also reported on the use of H202 to elevate the dissolved oxygen concentrations for oxygen uptake studies. Besides these applications, several full-scale problem solutions have been demonstrated. According to Shepherd, H202 has been used to treat sour water in refineries (4,5). One of the major applications has been the control of odor and corrosion due to H2S in sewer lines (4,5,6). This problem, 'which is prevalent in the warmer regions such as Florida, Texas, and California, can be treated by H202 more economically than other treatments such as chlorine, caustic, or ozone. Another major application is the use of H202 to control bulking sludge (6,7,8,9,10,11,12). This application was detailed by Dr. Keller at last year's conference. 447 |
Resolution | 300 ppi |
Color Depth | 8 bit |
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