Drinking Water Measurement

  1. A More Efficient Approach To EPA Stage 2 DBP Compliance

    Everyone wants pathogen-free drinking water, and adding chlorine is a great way to get it. Unfortunately, the dirtier a water treatment plant (WTP)’s raw water inflow — in terms of natural organic matter (NOM) or microbial organisms — the more disinfection byproducts (DBPs) the chlorination process will generate in the form of trihalomethanes (THMs) and haloacetic acids (HAAs). Those DBPs increase the risk of non-compliance with the U.S. EPA’s Disinfectants and Disinfection Byproducts Rules. Choosing the right instrumentation to measure NOM through spectral absorption coefficients (SACs) can have a big impact on treatment strategies — in terms of both costs and compliance performance.

  2. Clearing Up Misconceptions About Turbidimeter Performance And Calibration

    There is little doubt about the importance of taking turbidity readings as part of drinking water treatment. However, there are certain misperceptions about the associated requirements and procedures needed to confirm the validity of those readings. The major points of confusion seem to revolve around perception of the terms “approved,” “calibration,” and “validation.” Here is a quick synopsis on what you really need to know about meeting U.S. EPA Method 180.1: Determination of Turbidity by Nephelometry for accurate turbidity readings.

  3. Orchestrating Corrosion Control With Phosphate Analyzers

    As with so many other drinking water treatment processes, corrosion control demands a delicate balance among multiple factors. From the water-purifying chlorine that increases corrosion risk, to alternative strategies that reduce corrosion — using either elevated pH or phosphates — keeping corrosion under control requires sound strategy and reliable execution. Here are several approaches to addressing those conditions, along with options for better, more effective corrosion control.

  4. Chlorine vs. Chloramine: A Tale Of Two Chemistries

    In drinking water treatment’s ongoing battle between disinfection and disinfection byproducts (DBPs), most water utility customers are oblivious to the process. One thing they do notice, however, is when their water smells or tastes bad. Here are some insights that can help water treatment plant (WTP) operators deal with their internal concerns about DBPs and residual chlorine or ammonia levels, as well as their external concerns about customer perceptions of water quality.

  5. Digital Engineering Models Enable Comprehensive Lifecycle Information Management For Water And Wastewater Treatment Plants

    Water and wastewater treatment plant design is a large scale, complex engineering effort that requires a multi-discipline design team, often spread across many offices, and involving collaboration among different consulting firms, contractors, and owners.

  6. Revolutionizing Asset Management In The Water/Wastewater Industry

    The industrial world is awash with data and new information from sensors, applications, equipment, and people.

  7. Advancing Management Of Urban Water Infrastructure

    A wide range of issues can disrupt the normal functioning of an urban water system, such as storms and other natural disasters, pollution, physical damage, cyber incidents, aging and insufficient infrastructure, and rapid urban growth.

  8. FMCW Or ToF? Which Radar Level Technology Is Best For Tank Gauging In Custody Transfer Applications?

    Measuring the level of tanks used to hold fluids for custody transfer can be expensive. This is not due to the cost of the measurement instrumentation, but to what inaccurate measurements can cost the company. Picking the right instrumentation for applications is important. Which radar level technology should you choose for tank gauging in custody transfer applications? Frequency Modulated Continuous Waveform (FMCW) or pulsed Time-of-Flight (ToF or PToF).

  9. Are You Experiencing Deviation Alarms In Your High Pressure Process Vessels?

    In this white paper, learn how to decrease alarms due to redundant level devices not matching, especially in applications with high pressure and/or high temperature. The importance of Gas Phase Compensation (GPC) and how it affects level readings of guided wave radar (GWR) devices is critical. The presence of polar gas also can have an effect on the accuracy of any GWR that does not have GPC when installed in applications where high temperature or pressure is present. This paper will discuss these issues and address how to overcome them.

  10. Monitoring Raw Water Turbidity – What’s Important!

    Monitoring raw water turbidity is important to inform the operator of significant changes in water quality, especially turbidity, allowing the operator to make process chemistry changes to respond to the increasing raw water turbidity. Variations in raw water present turbidity measurement challenges different from those found elsewhere in a typical treatment plant.