pH stabilization during testing of lethality of wastewater effluent to rainbow trout: contents

Table of Contents

• Front Matter
  • Readers' Comments
  • Review Notice
  • Abstract
  • Foreword
  • Terminology
  • Acknowledgements
• Section 1: Introduction
  • 1.1 Condition #1 - Total Ammonia Measurement
  • 1.2 Condition #2 - Failure of Acute Lethality Reference Method EPS 1/RM/13
  • 1.3 Condition #3 - Maximum Ammonia Concentration
  • 1.4 Overview of pH Stabilization Techniques
• Section 2: Procedure Options for Conducting pH Stabilization of Wastewater Effluents
  • 2.1 General Requirements
    • 2.1.1 Observations and Measurements
    • 2.1.2 Chlorinated Wastewater Samples
    • 2.1.3 Test Validity Criteria
  • 2.2 pH Stabilization Using the CO₂ Injection Technique
    • 2.2.1 Apparatus for Delivering CO₂ Mixture
    • 2.2.2 Estimating Percent CO₂ Mixture Required to Stabilize pH
    • 2.2.3 Setting Flow Rates for CO₂ Mixture and Laboratory Air
    • 2.2.4 Controlling pH Drift
  • 2.3 pH Stabilization Using the Recycling Technique
    • 2.3.1 Recycling Technique Setup
    • 2.3.2 Controlling pH Drift
  • 2.4 pH Stabilization Using the pH Controller Technique
    • 2.4.1 Regulator/Solenoid Assembly
    • 2.4.2 pH Controller
    • 2.4.3 Controlling pH Drift
• Section 3: Reporting Requirements
• References

List of Tables

1. CO₂ Calibration Table for Estimating the Percent CO₂ Mixture Required to Maintain pH Control Based on Test Solution pH and Alkalinity

List of Figures

1. Schematic Diagram of a Six-concentration Test Using CO₂ Injection Technique
2. Front View of CO₂ Injection Technique - Control Board with Flow Meters
3. Rear View of CO₂ Injection Technique - Control Board with Connections
4. Glass Aquaria Used for CO₂ Injection Technique
5. Plastic Pails Used for CO₂ Injection Technique
6. Schematic Diagram of a Recycling Technique Test Unit
7. Glass Aquaria with Sampling Port, Air Pump, and Recycle Lid for Recycling Technique
8. Schematic Diagram of a Six-concentration Test Using pH Controller Technique
9. Solenoid with Regulator and Needle Valve Assembly for pH Controller Technique
10. Test Setup for pH Controller Technique
11. Overview of Setup for LC50 Test Using pH Controller Technique
12. Example of pH Controller Unit
13. Supply Line for CO₂ Showing Backflow Preventer Valve