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What Happened To My Disinfectant Residual?

Disinfectants like chlorine and chloramines work by oxidizing chemicals and microbes in the water, and that’s why we use them. The problem is that by doing their job, their concentration decreases, and it’s possible to end up with low or zero levels of disinfectant residuals. You can’t continuously monitor residuals everywhere in your system. Your OpenFlows WaterGEMS and OpenFlows WaterCAD models can help you determine residual disinfectant levels throughout the system, identify problems and develop approaches to maintain residuals such as changing dosing, switching disinfectants, adding booster stations, flushing, and blowoffs, …

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What is NPSH(required)?

NPSHr is a property of the pump and is a function of the flow. This value is determined by testing done by the manufacturer and is usually presented as one of the pump characteristic curves. You want to ensure that the available NPSH (NPSHa) is greater than the required NPSH (NPSHr), or the water will vaporize in the pump and damage the pump.

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Pump Configuration Toolbox

Picking the right number of pumps and which ones to run at any time without wasting energy is tricky. The problem gets especially tricky when you have the potential to mix constant and variable speed pumps, and there is no storage in the system, so you can’t simply run pumps efficiently and turn them off when a tank is full.

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Deep Emergencies

Water and wastewater do a very good job preparing for what I’ll call ā€œroutine emergenciesā€ā€”pipe breaks, short-term power outages, sewer blockages, pump mechanical failures, etc. There are standard operating procedures and frequent drills in well-run operations to make sure we can deal with such conditions. But what about the big emergencies? The ones that never happen until they do. We’ve had a taste of this with Covid, and the folks in Texas received an even stronger dose during last winter’s big freeze.

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OpenFlows SewerGEMS Solvers Part 1: Choosing the Right Solver for Your Stormwater Network

This robust solution provides engineers and sanitary network designers to reduce time and error in their projects. OpenFlows SewerGEMS combines constraint-based design routines, advanced scenario management with an easy-to-use user graphic interface, as well as easy-to-build and easy-to-maintain tools. It allows you to keep your hydraulic model accurate and up to date, saving time and effort in your critical decision-making processes.

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Which Water Conferences Should You Attend?

There is no shortage of conferences serving the water industry. Each of them contributes something to our profession, and attending is usually worthwhile, if not life-changing. But which ones should you attend? You can’t attend all of them, or you wouldn’t get any work done. I’ll run through a few of the conferences I’ve attended, and I’ll give you my thoughts below.

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