Ontario Pipeline - Spring 2015 - (Page 34)
FEATURE | TREATMENT
NOvEL USE OF
HyDROgEN PEROxIDE IN
BY cOLin GUTHRiE, PH.D.
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
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
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
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
Welcome New Members
Calendar of Events
OWWEA Member Listing
Index of Advertisers | Ad.com
Ontario Pipeline - Spring 2015