The De Nora blog: Water Made Easy

Cobb County Expands “excellent production of potable water” with New ClorTec® DNOSHG System

Apr 14, 2020 11:32:00 AM / by De Nora


As the second-largest provider of potable water in the state of Georgia, the Cobb County-Marietta Water Authority (CCMWA) prides itself on using the latest technology and innovation in water treatment to ensure optimal efficiency and safety in its operations.

To accomplish this, CCMWA relies on two water treatment facilities: the James E. Quarles Treatment Plant in Marietta, which treats water from the Chattahoochee River, and the Hugh A. Wyckoff Treatment Plant in Acworth which treats water from Allatoona Lake. Together, these treatment plants prepare water for wholesale distribution to 11 retail water suppliers, as well as industrial and institutional customers.

Built in 1965, the Wyckoff Water Treatment Plant has grown to keep pace with the ever-evolving water needs of northwest Georgia. While chlorine gas had traditionally been used at this facility, operators became wary when its hazardous potential became a concern for water treatment facilities across the country. 

As a result, CCMWA updated its disinfection system in 2012. This significant and much-needed investment included the installation of an on-site sodium hypochlorite generation unit. 

About the ClorTec® system

Following a review of available set-ups on the market, CCMWA selected the ClorTec® 2x CT1500 PPD OSHG system from De Nora Water Technologies. Already in numerous installations, this ClorTec® unit had a proven history of benefits, including the elimination of bulk chemical storage, fewer disinfection byproducts and a notably reduced threat to the safety of employees and the public at large. 

Consisting of the 1,500 pounds per day, on-site sodium hypochlorite generator, and associated equipment, the ClorTec® system’s size, and flexibility was an ideal fit for the plant’s space restrictions while allowing for future expansion. In fact, after experiencing years of consistent operational improvements, CCMWA did decide to expand and added a third ClorTec® generator.

“We were very pleased with the two existing generators and their productivity and were concerned that if one of them were to stop functioning properly, as can happen in the lifecycle of this type of equipment, it would be difficult for us to maintain our preferred operational level and quality,” said Terry Wilson, Division Manager of the Wyckoff plant. 

Choosing the ClorTec® DN generator

As the technology has continued to develop, Wilson and his team were drawn to the new brine pump added to the ClorTec® DN generator. Designed to improve water pressure levels, this best-in-class brine electrochlorination technology allows operators to more accurately control and adjust the amount of brine introduced into the system. 

An update to less-efficient mechanical sensors, the new generator also offers analog flow sensors for water and brine, a water-temperature- readings transmitter and programmable logic controllers. Additional benefits include the guaranteed lowest consumption of salt and electricity, an upgraded instrumentation panel for greater operator control and the highest efficiency rating in the industry,

Installed in the Spring of 2017, the 1,500 pounds per day ClorTec® DN generator is now part of a cycle through process, in which the three generators alternate in use, two at a time.

“The addition of the latest generator has upgraded our entire system, with clear enhancements made by De Nora to improve operations,” said Craig Scheibel, Process Control Programmer with CCMWA. “The new instrumentation panel and specifically the analog signals enable us to have not only greater flow control, but also better diagnostic capabilities should a fault occur.”

“Even in the high-demand season of summer, we’re pleased to report seven to nine-hour run times and excellent production of potable water for our satisfied customers,” Terry Wilson, Division Manager of the Wyckoff plant. 

Today, CCMWA continues to proactively maintain its commitment to providing sustainable, reliable drinking water, while also ensuring public health and safety in the region, 

Choosing the Right Treatment System 

Upgrading your water treatment facility is no small task. From choosing the design team to deciding on the right treatment system, many factors must be considered. Don’t go it alone.

Check out this FREE, easy-to-understand, technical overview of the electrochemical generation created by Chief Scientist, Andrew Boyle PhD. Click below for more information.

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Tags: Clortec, OSHG, on-site sodium hypochlorite generation, Chattahoochee River, Acworth GA, Allatoona Lake, Marietta GA

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