Ontario Pipeline - Spring 2015 - (Page 34)

FEATURE | TREATMENT NOvEL USE OF stAbiLizeD HyDROgEN PEROxIDE IN DRINkINg WATER BY cOLin GUTHRiE, PH.D. SanEcoTec Ltd. A t the 16th National Conference on Drinking Water in October, Fleming College's Centre for Alternative Wastewater Treatment (CAWT) reported on the Pilot Study to use stabilized hydrogen peroxide in secondary disinfection at the Killaloe Water Treatment Plant. In summary: The results show several potential benefits of using stabilized hydrogen peroxide in a water treatment process. Benefits were seen in terms of reducing concentrations of potentially harmful chlorine disinfection by-products, improvements in water esthetics, suppression of microbial activity, and the ability of the new treatment to remain a stable and active disinfectant under conditions similar to those found in hot water heaters. The pilot-scale study was conducted to evaluate the performance of using stabilized hydrogen peroxide - HuwaSan Peroxide® (HSP) - as an alternative to chlorine-based potable water secondary disinfection method. 34 | O N T A R I O P i P E L i n E | SPRING 2015 The primary purpose of the Pilot was to reduce existing high levels of chlorine disinfection by-products including trihalomethanes (THMs). Other objectives included determining the possible influence of hot water heaters on HSP stability and HSP's ability to improve the bacteriological quality of the drinking water. Research work was performed by Kraemer et al. (2014) at the Centre for Alternative Wastewater Treatment at Fleming College. The town of Killaloe is a rural community located 170 km northwest of Ottawa. The town's Water Treatment Plant services a population of 656 including a large proportion of retirees and seasonal residents. The Plant has a maximum capacity of 602 m3/day, but provided an average of 68.8 m3/day of treated water in 2012. The water distribution system includes 3.5 km of polyvinyl chloride pipes and is marked by long residence times of between three to five days. Killaloe's historic use of chlorine as a drinking water disinfectant, coupled with the natural organics found in the source water and long distribution residence times resulted in high concentrations of disinfection by-products (DBPs) including THMs in the drinking water. Concentrations of total THMs in the Killaloe drinking water distribution system were variable, ranging from 20 µg/L to 200 µg/L (Kraemer et al., 2014). This variation can be seen in Figure 1. Approximately 45 per cent of all THMs measured in the treated water leaving the Treatment Plant and at a sampling site were above the drinking water guideline of 100 µg/L prior to implementing AVIVE™ system (Kraemer et al., 2014). Raw water is taken from a single well groundwater source, which is under the direct influence of surface water. Treatment is accomplished via greensand contactors, uV disinfection, and dosing of potassium permanganate, sodium hypochlorite, and HSP before it is stored in clearwells. Water samples were collected and analyzed from a set of eight points in the Treatment Plant and an additional four in

Table of Contents for the Digital Edition of Ontario Pipeline - Spring 2015

From the Publications Chair
The OWWA Report
The OMWA Report
The OWWEA Report
From Our AWWA Director
Ontario’s Water Conference and Tradeshow
Acclamation of 2015–2018 OWWA Directors
Let’s Drink to That!
New Possibilities with Municipal Water Data
The NSERC Industrial Research Chair in Water Treatment at the University of Waterloo
Making a Mark
AWWAO Certification Week
Novel Use of Stabilized Hydrogen Peroxide in Drinking Water
Water for People India Impact Tour
Committee Reports
Certification Corner
Welcome New Members
Calendar of Events
OWWEA Member Listing
Index of Advertisers | Ad.com

Ontario Pipeline - Spring 2015