Municipal Water and Wastewater Blog

Municipal Water and Wastewater

The Bright Side of Biosolids

Posted by WesTech Engineering on Apr 19, 2021 6:55:41 PM

Disposing of excess sludge – the organic remnants of the wastewater treatment process – is a significant economic and environmental challenge for anyone who operates a wastewater treatment plant. The facility needs to treat the wastewater and then remove the biosolids. What if the sludge was not an irritation and instead became a valuable part of the facility’s resource recovery?

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Category: Digestion, Renewable Energy, Wastewater Treatment

Water Reuse: The Potential for Ultrafiltration and Reverse Osmosis

Posted by Melissa Nichols, PE on Apr 1, 2021 5:09:19 PM

A Case for Water Reuse

Recycling water both in acceptance of concept and in practice has steadily increased in recent years. Various factors such as diminishing water supplies, extreme drought, seawater intrusion, population increase, and others have created an urgency for municipalities and industries to explore alternate water supply options. Thankfully, there are innovative solutions, such as membrane systems, that can help facilities looking for reliable water reuse treatment technologies.

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Category: Filtration, Industrial Water Reuse, Wastewater Treatment, Water Treatment

Five Ways a Retrofit Can Improve Your Water or Wastewater Equipment

Posted by WesTech Engineering on Jan 25, 2021 11:31:15 AM

Your water and wastewater treatment equipment is subject to continuous wear and tear, requiring repeat visits for parts and services. You can, though, take steps now to minimize repairs and keep your equipment running its best for years to come.

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Anaerobic Digestion Equipment - Best Practices for Selection and Operation

Anaerobic Digestion has played a key part in turning wastewater treatment plants (WWTPs) into water resource recovery facilities (WRRFs). The byproduct traditionally called “waste gas” is used as biogas - a renewable, clean, green energy source. Some facilities have been able to generate enough to put renewable natural gas (RNG) into a pipeline and/or send power back to the grid.

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Category: Digestion, Renewable Energy, Wastewater Treatment

Strategies for Reducing Disinfection Byproducts

Posted by WesTech Engineering on May 7, 2020 7:14:32 PM

The Environmental Protection Agency (EPA) developed the Surface Water Treatment Rule (SWTR) to create a safeguard for public drinking water. While this rule requires plants to treat surface waters with disinfectants, the disinfectants they use can react with natural organic matter (NOM) in their source waters to form disinfection byproducts (DBPs) that may be carcinogens. As a result, the EPA has implemented DBP rules that regulate DBP compounds such as trihalomethanes (THMs) and haloacetic acids (HAAs).

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Category: Water Treatment

Establishing an Effective PFAS Treatment Plan

Posted by WesTech Engineering on Sep 23, 2019 11:24:40 AM

A group of chemicals known as PFAS – perfluoroalkyl and polyfluoroalkyl substances – has been generating a lot of attention. With PFAS in drinking water, public health may be at risk of adverse health effects such as high cholesterol, low birth weight infants, immune-system problems, cancer, and thyroid disease.

Media attention about the topic has grown, and municipal water plants are facing pressure to evaluate PFAS treatment and how to best approach this emerging contaminant in their own water sources.

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Category: Water Treatment

Thirty Years of Spiral Rakes in Clarifiers – What Have We Learned?

Posted by Russell C. Wright, MS, PE on May 22, 2019 3:07:49 PM

The year 2019 marks thirty years since WesTech’s first installation of spiral blade clarifiers at the 23rd Avenue Treatment Plant for the city of Phoenix, Arizona. The then-new clarifier design included many innovations, including (but not limited to) deep, continuous spiral rake blades, an energy dissipating inlet (EDI), and a Stamford baffle below the effluent weir. It was christened the COP™, which stood for Clarifier Optimization Package.

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Category: Water Treatment

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