Ontario Pipeline - Fall 2018 - 18

FEATURE | DISINFECTION

CONTROL AND
PREVENTION OF
DISINFECTION
BY-PRODUCT
FORMATION
THROUGH SOURCE WATER MONITORING
USING PHOTOELECTROCHEMICAL
OXYGEN DEMAND
BY JUSTIN DICKERMAN

S

afe operation of a Water
Treatment Plant (WTP) requires
careful monitoring of the water
supply influent to the plant, as
a guard for any substances entering the
treatment works that could negatively
impact treated water quality in the distribution system. One aspect of water
quality that has recently garnered more
attention from authorities and utilities is
Natural Organic Matter (NOM), which refers
to a group of carbon-based compounds
found in natural water systems formed
by the decomposition of organic materials and associated metabolic reactions.
While NOM itself does not pose a risk to
human health, some NOM compounds
18 | O N T A R I O P I P E L I N E | FALL 2018

are known to react with chlorine and
chloramines in drinking water treatment
to produce disinfection by-products
(DBPs) such as Trihalomethanes (THMs)
and Haloacetic Acids (HAAs), which are
known to be carcinogenic and/or genotoxic (Figure 1). Health Canada, the US
Environmental Protection Agency, and the
World Health Organization include sections
focused on control of DBPs in their Drinking
Water Treatment Guidelines.
Preventing the formation of DBPs is
a multi-faceted issue for drinking water
utilities, with a variety of strategies being
developed for both general treatment
and specific plant/source conditions.
Each facility and water source is different,

therefore no one strategy can be applied
across the board, and often utilities are
encouraged by their local authority to
have a unique monitoring plan developed.
Prevention strategies can be generalized
into four groups:
* Optimization of treatment conditions to
remove precursor NOM compounds;
* Using a different chemical disinfectant
with less tendency to form by-products;
* Using a non-chemical disinfectant;
and/or
* Removing DBPs prior to distribution.
Since drinking water plants typically maintain a disinfectant residual in
the distribution system, use of solely a
non-chemical disinfection is often not an



Ontario Pipeline - Fall 2018

Table of Contents for the Digital Edition of Ontario Pipeline - Fall 2018

The OWWA Report
The OMWA Report
The OWWEA Report
Ontario Provincial Standards are Made for Life in Ontario
QA/QC for the Operational Lab & Online Equipment
The Perils of Misreading and Misusing Standards
Control & Prevention of Disinfection By-product Formation
The Great Lakes Water Festival
Committee Reports
Certification Corner
OWWEA Member Listing
Index to Advertisers
Ontario Pipeline - Fall 2018 - Intro
Ontario Pipeline - Fall 2018 - bellyband1
Ontario Pipeline - Fall 2018 - bellyband2
Ontario Pipeline - Fall 2018 - cover1
Ontario Pipeline - Fall 2018 - cover2
Ontario Pipeline - Fall 2018 - 3
Ontario Pipeline - Fall 2018 - The OWWA Report
Ontario Pipeline - Fall 2018 - The OMWA Report
Ontario Pipeline - Fall 2018 - The OWWEA Report
Ontario Pipeline - Fall 2018 - 7
Ontario Pipeline - Fall 2018 - Ontario Provincial Standards are Made for Life in Ontario
Ontario Pipeline - Fall 2018 - 9
Ontario Pipeline - Fall 2018 - 10
Ontario Pipeline - Fall 2018 - 11
Ontario Pipeline - Fall 2018 - QA/QC for the Operational Lab & Online Equipment
Ontario Pipeline - Fall 2018 - 13
Ontario Pipeline - Fall 2018 - 14
Ontario Pipeline - Fall 2018 - The Perils of Misreading and Misusing Standards
Ontario Pipeline - Fall 2018 - 16
Ontario Pipeline - Fall 2018 - 17
Ontario Pipeline - Fall 2018 - Control & Prevention of Disinfection By-product Formation
Ontario Pipeline - Fall 2018 - 19
Ontario Pipeline - Fall 2018 - 20
Ontario Pipeline - Fall 2018 - 21
Ontario Pipeline - Fall 2018 - The Great Lakes Water Festival
Ontario Pipeline - Fall 2018 - 23
Ontario Pipeline - Fall 2018 - Committee Reports
Ontario Pipeline - Fall 2018 - 25
Ontario Pipeline - Fall 2018 - 26
Ontario Pipeline - Fall 2018 - 27
Ontario Pipeline - Fall 2018 - 28
Ontario Pipeline - Fall 2018 - 29
Ontario Pipeline - Fall 2018 - 30
Ontario Pipeline - Fall 2018 - 31
Ontario Pipeline - Fall 2018 - 32
Ontario Pipeline - Fall 2018 - Certification Corner
Ontario Pipeline - Fall 2018 - OWWEA Member Listing
Ontario Pipeline - Fall 2018 - 35
Ontario Pipeline - Fall 2018 - 36
Ontario Pipeline - Fall 2018 - 37
Ontario Pipeline - Fall 2018 - Index to Advertisers
Ontario Pipeline - Fall 2018 - cover3
Ontario Pipeline - Fall 2018 - cover4
https://www.nxtbook.com/naylor/OWWQ/OWWQ0318
https://www.nxtbook.com/naylor/OWWQ/OWWQ0218
https://www.nxtbook.com/naylor/OWWQ/OWWQ0118
https://www.nxtbook.com/naylor/OWWQ/OWWQ0417
https://www.nxtbook.com/naylor/OWWQ/OWWQ0317
https://www.nxtbook.com/naylor/OWWQ/OWWQ0217
https://www.nxtbook.com/naylor/OWWQ/OWWQ0117
https://www.nxtbook.com/naylor/OWWQ/OWWQ0416
https://www.nxtbook.com/naylor/OWWQ/OWWQ0316
https://www.nxtbook.com/naylor/OWWQ/OWWQ0216
https://www.nxtbook.com/naylor/OWWQ/OWWQ0116
https://www.nxtbook.com/naylor/OWWQ/OWWQ0415
https://www.nxtbook.com/naylor/OWWQ/OWWQ0315
https://www.nxtbook.com/naylor/OWWQ/OWWQ0215
https://www.nxtbook.com/naylor/OWWQ/OWWQ0115
https://www.nxtbookmedia.com