The village of Dewitt is located in the heart of Illinois,
more than 150 miles from Chicago. Although the town has a population of only
200 residents, a number of contaminants had taken up residence in its water
supply.
In 2011, Urbana, Ill.-based consulting firm Berns, Clancy
and Associates contacted AdEdge to help clean up the community’s water supply.
The filter system was not meeting regulatory requirements,with its elevated
levels of arsenic, iron and manganese, and hydrogen sulfide. In addition to
these contaminants, the water also had high levels of phosphate, ammonia and
total organic carbon.
Using a 50-gallon-per-minute treatment system composed of
four 24-inch carbon steel vessels arranged in a parallel configuration, AdEdge
tackled the contamination. The vessels were loaded with AdEdge’s AD26 oxidation/filtration
media for the removal of arsenic, iron and manganese, and hydrogen sulfide.
AD26 media is a NSF 61-certified, manganese dioxide-based filter media. The
high filtration rate of the AD26
media allows for the removal of the contaminants while maintaining the
existing building’s small footprint.
The AD26 media in the presence of a strong oxidant, which is
injected into the raw water, acts as a catalyst for the accelerated removal of
the contaminants. The programmable
logic controller (PLC) initiates an automatic backwash of the treatment
vessels to remove any precipitated solids that may accumulate in the media bed
and to extend the life of the AD26 media.
Backwashing
occurs one vessel at a time to ensure water is continuously being treated
throughout the day. The system fully integrates with the existing
post-chlorination system that addresses the high ammonia levels in the water
before going to distribution.
The system was successfully commissioned in July 2013.
Today, it treats more than 30,000 gallons of water each day, reducing each
contaminant to non-detectable levels.
AdEdge’s packaged treatment systems are the ideal
contamination solution for small community drinking water systems. Contact AdEdge and let us
create a cleaner, safer water supply for your customers.
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