Successes and challenges with startup and operations of the Advanced Treatment facilities at the Northern Kentucky Water District complying with Disinfectant/ Disinfection By-Products Rule.

By Nick Winnike, Professional Engineer, Vice President, CH2M HILL, Mary Carol Wagner Water Quality Manager Northern Kentucky Water District and Brent Tippey, Professional Engineer, Vice President, HDR Inc.

Nick Winnike, along with co-author Mary Carol Wagner from the Northern Kentucky Water District will present their paper “First Year Operations of Advanced Treatment facilities at the Northern Kentucky Water District” on Tuesday, July 16 at 9:15 a.m., during the 2013 Kentucky/Tennessee Water Professionals Conference in Louisville, KY. Learn more about CH2M HILL’s participation and presentations at KY/TN 2013.

Water districts across the country are dealing with concerns on how best to treat drinking water for public consumption and maintain water quality in compliance with federal regulations at the point of delivery to the customer. Construction of Advanced Treatment facilities was completed in mid-2012 by the Northern Kentucky Water District at its Memorial Parkway (MPTP) and Fort Thomas (FTTP) water treatment plants. The initial capacity of the MPTP AT project is 10 MGD, but is easily expandable to 20 MGD. The capacity of the FTTP AT project is 44 MDG.  The facilities were designed and constructed specifically to comply with the Disinfectant/ Disinfection By-Products Rule, and to provide an additional disinfection barrier. The AT facilities included post filtration Granular Activated Carbon (GAC) contactors followed by Ultraviolet Light (UV) disinfection. Similar design criteria for the GAC and UV facilities were adopted at each plant.

Post-filtration Granular Activated carbon (GAC) is considered “Best Available Technology” by the United States Environmental Protection Agency for the control of disinfection by-products in water treatment plants. UV is regarded as an excellent, cost-effective process to control potential cryptosporidium and giardia contamination in drinking water.

Our presentation will discuss system performance during the first year of operations at the MPTP and FTTP facilities, including water quality data with respect to both regulatory requirements and taste and order reduction when an MIB and geosmin episode occurred. We will share operations observations concerning contactor backwash cycles with respect to the frequency of backwash and chlorine concentration in the feed water to the contractors.

Continually evaluating the successes and challenges of carbon regeneration after cycle completion, as well as considering possible alternatives available for carbon regeneration, is crucial to continued economical operation of the treatment facilities.

Nick Winnike has 34 years of experience as a water and wastewater process engineer. As the project delivery and quality leader for nine Midwestern states, he is responsible for the successful delivery of the portfolio of drinking water, storm water, and wastewater projects for public sector clients. He has served as project manager for water treatment projects and wastewater studies and designs in Cincinnati, Louisville, St. Louis and Rochester, MN. Additionally he served as the chief engineer for both the water and wastewater system projects at Fort Campbell. Out of the office, he enjoys promoting the engineering profession to elementary and high school students.