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Measurement of Oxygen Transfer in Clean Water

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Abstract

  • Prepared by the Committee on Oxygen Transfer Standards of the Special Standards Division of the Environmental & Water Resources Institute of ASCE Measurement of Oxygen Transfer in Clean Water, ASCE/EWRI 2-22, provides the latest methods for measuring the rate of oxygen transfer from diffused gas and mechanical oxygenation devices to water. This standard aims to be general enough to be applied to all clean water unsteady-state tests and specific enough to incorporate all essential procedures.

    This standard is an update of the 2006 version. Revisions to the mandatory requirements include use of the nonlinear least squares estimates for parameter fitting, the need to correct and report results to a common TSS level, and acceptance of a nitrogen gas method for deoxygenation. A new commentary provides a detailed description of a supersaturated oxygen desorption method. This method may be incorporated into a future revision of the standard as an acceptable method, pending a comparison of results with existing deoxygenation methods.

    ASCE 2-22 is meant to be used by engineers in the preparation of specifications for compliance testing by manufacturers developing performance information and is applicable to laboratory scale oxygenation devices with water volumes of a few gallons, as well as to full-scale systems with water volumes typical of those found in the activated sludge wastewater treatment process.

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Front Matter
i–xi
    CHAPTER 1 INTRODUCTION
    1–3
    CHAPTER 2 SUMMARY OF THE METHODS
    5–6
    CHAPTER 3 ACCURACY AND LIMITATIONS
    7–8
    CHAPTER 4 DEFINITIONS
    9–10
    CHAPTER 5 APPARATUS AND METHODS
    11–12
    CHAPTER 6 PROCEDURE
    13–18
    CHAPTER 7 DATA ANALYSIS
    19–20
    CHAPTER 8 INTERPRETATION AND REPORTING OF RESULTS
    21–22
    CHAPTER 9 REPORTING
    23–24
    APPENDIX A GAS FLOW MEASUREMENTS
    25–26
    APPENDIX B POWER MEASUREMENTS
    27–28
    APPENDIX C POWDERED SULFITE ADDITION
    29–30
    APPENDIX D DISSOLVED OXYGEN PROBE CALIBRATION
    31–32
    APPENDIX E PREPARATION OF DATA FOR ANALYSIS
    33–34
    APPENDIX F CALCULATION OF C*∞20
    35–36
    COMMENTARY (NONMANDATORY) TO STANDARD 2-22
    CHAPTER C1 INTRODUCTION
    37–39
    CHAPTER C2 THE HIGH PURITY OXYGEN DESORPTION METHOD
    41–44
    CHAPTER C5 APPARATUS AND METHODS
    45–46
    CHAPTER C6 PROCEDURES
    47–48
    CHAPTER C8 INTERPRETATION AND REPORTING OF RESULTS
    49–50
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    Index
    51–52
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