Rural Water - Quarter 3, 2017 - 52

which characteristically results in very
little waste.
The county's cost analysis showed
that the GAC filters needed to effectively
remove DBPs for a full year before requiring
reactivation. Calgon Carbon proposed its
newest and largest GAC adsorption system,
the Model-14. This system, equipped with
two vessels that hold 60,000 pounds of GAC
each, was developed as SCWS evaluated
how best to upgrade the plant. Birminghambased Municipal Consultants Inc., who
played a large role in the design process for
the plant, took notice of the new system.

"When Calgon Carbon released the
60,000-pound vessels, we were able to
reduce the number of vessels we needed
down to four," said Chris Cousins, president
of Municipal Consultants. "This saves money
because with the larger size, we only have to
reactivate two of them every fiscal year."
In the end, the plant installed four of
the 14-foot diameter Model-14 pressure
vessels over a 10-month period. Filtered
water is pumped through the GAC to remove
the natural organic matter (NOM) from
the source of water before disinfection,
preventing the formation of DBPs. The

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THIRD QUARTER 2017

794539_Kerneos.indd 1

2/12/16 5:28 PM

system is designed to allow plant operators
to pump either all or part of the filtered
water through the vessels in either parallel
or series operation. As of 2016, the
Talladega/Shelby water treatment plant is
the only plant currently operating the large
60,000-pound vessels.
The county sends the spent GAC from
two vessels, approximately every year, to
Calgon Carbon for custom reactivation. The
spent GAC is transported to one of Calgon
Carbon's custom reactivation facilities,
where it is thermally reactivated to remove
adsorbed contaminants and restore its
adsorption capacity. Calgon returns and
installs the reactivated carbon (including a
small amount of virgin GAC to make up for
losses in reactivation) into the Talladega/
Shelby vessels. The entire reactivation
process is performed according to the
latest NSF and AWWA standards governing
the reactivation of GAC used for drinking
water treatment. All of Calgon Carbon's
custom reactivation facilities are exclusively
dedicated to the reactivation of potablegrade carbons.
Ultimately, GAC was a wise selection of
the treatment options that were considered
because it is an effective removal technology
that accomplishes more than just DBP
compliance. GAC not only removes targeted
contaminants of concern, such as NOM
and DBPs, but it also acts as a defense
barrier against accidental contamination by
unregulated compounds like perfluorinated
compounds (PFCs), pesticides and a number
of other contaminants listed on the U.S.
EPA's Contaminant Candidate List 4 (CCL4).
Since the installation of the Model-14
vessels with GAC at the Talladega/Shelby
plant, DBP levels throughout the distribution
system have remained in compliance.
Installation of the GAC systems pre-empted
the impact of the Stage 2 DBPR, ensuring
Shelby County's water was in continuous
compliance during the transition from Stage
1 to the more stringent Stage 2.
The affordability of Calgon Carbon's
proposed solution, the availability of custom
reactivation services, and the large vessel
design were all factors in SCWS's choice
to work with Calgon Carbon, according to
Michael Cain, manager of water services
for Shelby County. "This was supplied as a
complete system: Carbon, vessels, pipes,
pressure vessels and all," said Cain. "Calgon
Carbon has proven to be the right choice." ●


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Table of Contents for the Digital Edition of Rural Water - Quarter 3, 2017

From the President
Surviving Hurricanes
Emergency Preparedness
Indiana Teamwork During a Flood Emergency
Rates and Long-Term Sustainability
Technology: Ammonia – A Growing Problem with a Practical Solution
Emergency Management: Biological Wastewater Treatment Toxicity
Insurance: Commercial General Liability Coverage Basics
A Day in the Life of a Circuit Rider
Regulatory Update
Case Study: Installing Granular Activated Carbon Today to Prevent Regulatory Issues in the Future
Cleared for Takeoff
Up the Creek: Birdfeeder Politics
Index to Advertisers/ Advertisers.com
From the CEO
Rural Water - Quarter 3, 2017 - intro
Rural Water - Quarter 3, 2017 - cover1
Rural Water - Quarter 3, 2017 - cover2
Rural Water - Quarter 3, 2017 - 3
Rural Water - Quarter 3, 2017 - 4
Rural Water - Quarter 3, 2017 - 5
Rural Water - Quarter 3, 2017 - 6
Rural Water - Quarter 3, 2017 - 7
Rural Water - Quarter 3, 2017 - 8
Rural Water - Quarter 3, 2017 - 9
Rural Water - Quarter 3, 2017 - 10
Rural Water - Quarter 3, 2017 - From the President
Rural Water - Quarter 3, 2017 - Surviving Hurricanes
Rural Water - Quarter 3, 2017 - 13
Rural Water - Quarter 3, 2017 - 14
Rural Water - Quarter 3, 2017 - 15
Rural Water - Quarter 3, 2017 - 16
Rural Water - Quarter 3, 2017 - 17
Rural Water - Quarter 3, 2017 - Emergency Preparedness
Rural Water - Quarter 3, 2017 - 19
Rural Water - Quarter 3, 2017 - 20
Rural Water - Quarter 3, 2017 - 21
Rural Water - Quarter 3, 2017 - 22
Rural Water - Quarter 3, 2017 - 23
Rural Water - Quarter 3, 2017 - 24
Rural Water - Quarter 3, 2017 - 25
Rural Water - Quarter 3, 2017 - 26
Rural Water - Quarter 3, 2017 - Indiana Teamwork During a Flood Emergency
Rural Water - Quarter 3, 2017 - 28
Rural Water - Quarter 3, 2017 - 29
Rural Water - Quarter 3, 2017 - 30
Rural Water - Quarter 3, 2017 - Rates and Long-Term Sustainability
Rural Water - Quarter 3, 2017 - 32
Rural Water - Quarter 3, 2017 - 33
Rural Water - Quarter 3, 2017 - 34
Rural Water - Quarter 3, 2017 - Technology: Ammonia – A Growing Problem with a Practical Solution
Rural Water - Quarter 3, 2017 - 36
Rural Water - Quarter 3, 2017 - 37
Rural Water - Quarter 3, 2017 - 38
Rural Water - Quarter 3, 2017 - Emergency Management: Biological Wastewater Treatment Toxicity
Rural Water - Quarter 3, 2017 - 40
Rural Water - Quarter 3, 2017 - 41
Rural Water - Quarter 3, 2017 - 42
Rural Water - Quarter 3, 2017 - Insurance: Commercial General Liability Coverage Basics
Rural Water - Quarter 3, 2017 - 44
Rural Water - Quarter 3, 2017 - A Day in the Life of a Circuit Rider
Rural Water - Quarter 3, 2017 - 46
Rural Water - Quarter 3, 2017 - Regulatory Update
Rural Water - Quarter 3, 2017 - 48
Rural Water - Quarter 3, 2017 - 49
Rural Water - Quarter 3, 2017 - 50
Rural Water - Quarter 3, 2017 - Case Study: Installing Granular Activated Carbon Today to Prevent Regulatory Issues in the Future
Rural Water - Quarter 3, 2017 - 52
Rural Water - Quarter 3, 2017 - Cleared for Takeoff
Rural Water - Quarter 3, 2017 - 54
Rural Water - Quarter 3, 2017 - Up the Creek: Birdfeeder Politics
Rural Water - Quarter 3, 2017 - 56
Rural Water - Quarter 3, 2017 - 57
Rural Water - Quarter 3, 2017 - Index to Advertisers/ Advertisers.com
Rural Water - Quarter 3, 2017 - 59
Rural Water - Quarter 3, 2017 - 60
Rural Water - Quarter 3, 2017 - From the CEO
Rural Water - Quarter 3, 2017 - 62
Rural Water - Quarter 3, 2017 - cover3
Rural Water - Quarter 3, 2017 - cover4
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