WesTech Municipal Water/Wastewater Blog

Municipal Water and Wastewater

Ames, Iowa, Builds New Municipal Water Treatment Plant With WesTech Clarifiers, Filters, and Aerators

Posted by WesTech Engineering on Jun 19, 2017 10:00:00 AM

In 2009, the city of Ames, Iowa, decided to build a new municipal water treatment plant after concluding that renovation and expansion of the existing plant would be more difficult and expensive than starting fresh.

The city’s existing plant, built in 1924 with a filtration system installed in 1927, was originally an iron removal facility with the capacity to handle two million gallons per day (MGD).

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Category: Water Treatment

Groundwater Treatment Removes Contaminants Including Iron, Manganese

Posted by WesTech Engineering on May 10, 2017 4:44:13 PM

Approximately 35% of public-supply water withdrawals come from groundwater sources. One of the most common issues that water plants encounter when it comes to groundwater treatment is the removal of contaminants, including iron and manganese.

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Category: Water Treatment

Cost Assessment and Design Considerations for Microfiltration and Ultrafiltration Membrane System Retrofits

Posted by Daniel J. Dye, PhD, PE; Jason D. Nay; Libbie Linton, PE on Mar 23, 2017 6:44:33 PM

Microfiltration and ultrafiltration membrane (UF/MF) fibers and modules have improved substantially over the last few years, and several new brands have become available. Each manufacturer touts unique membrane characteristics, hydraulic properties, fiber durability, warranty support, resistance to fouling, and operational flexibility.

The abundance of competitive brands on the market has driven costs down, even as quality improves. These factors have caused several water plant owners to consider retrofitting their plant when it comes time to replace part or all of their old membrane system modules.

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Category: Water Treatment

Monitor Basic Plant Parameters to Optimize Net Production

Posted by Rich Ross, Scott Pallwitz, Eric Hessing on Feb 22, 2017 6:04:00 AM


A large percentage of package water treatment plants today operate using obsolete or inefficient backwash methods. These methods can be improved upon by monitoring basic parameters to initiate a clarifier flush and a filter backwash based upon set-time intervals, headloss across the media, and effluent turbidity.

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Category: Clarifier Maintenance, Water Treatment

4 Types of Operational Control Systems for Gravity Filtration – Pros and Cons

Posted by Scott Pallwitz, PE, and Darin St. Germain, PE on Dec 28, 2016 1:23:53 PM

Thousands of water and wastewater treatment facilities use granular media filters. An operational control system ­– along with media configuration, underdrain system, and backwash process – is an important consideration because it determines how water flow is controlled through the filter.

Four basic types of operational control systems are used in gravity filtration, with some variances from plant to plant. Each has advantages and disadvantages.

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Category: Wastewater Treatment, Water Treatment

Peru, New York, Updates Package Water Treatment System

Posted by Rich Ross on Aug 15, 2016 12:51:32 PM

The Town of Peru’s early 90s era water treatment plant began facing difficulties meeting new water treatment regulations, causing the town to invest $3 million in water system upgrades to improve the overall quality of the water and help meet the regulations. The investment included improvements in storage tower mixing systems, reservoir dredging, and treatment plant upgrades. All aspects of the improvements relate to reducing organics that lead to the creation of disinfection byproducts such as THMs and HAA5s.

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Category: Water Treatment

Producing Clean Drinking Water Regardless of the Elements

Posted by Trident Team on Jul 20, 2016 6:01:03 PM

As plants are installed further north, water treatment performance can be affected by the elements, such as colder weather conditions, wind blowing across the water source, and formation of organics.

The Northern Village of Ile a La Crosse, Saskatchewan, operates a surface water treatment plant for their drinking water supply. The existing facility, which serves 1,600 residential and commercial businesses, was at design capacity, and thus was having difficulty keeping up with demand. Further, the water treatment plant was struggling to meet regulatory requirements.

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Category: Water Treatment