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Mechanical Wastewater Treatment Plant Renovation
and Expansion
City of Blackfoot, Idaho
OVERVIEW
The City of Blackfoot’s extended aeration mechanical wastewater
treatment plant was violating its Snake River NPDES discharge permit
when Keller Associates was retained to assist in resolving the problem.
After a detailed wastewater treatment plant audit and development
of an upgrade master plan for the treatment facilities, the plant
was upgraded to handle the large BOD loadings coming from a cheese
plant, a large regional dry cleaning facility, a beef processing
plant, and process water from two major potato processing facilities.
The plant upgrade included the addition of a bioselector basin; additional
aeration basin capacity; headworks modifications; a new thermophilic
digester; solids thickening, dewatering, and storage facilities;
and new office and maintenance facilities. This
project was awarded the 2003 Outstanding Civil Engineering Award
(OCEA) by the Southern Idaho Section of ASCE and was presented
to the Pacific Northwest Council of ASCE to compete regionally.
CHALLENGE
The City of Blackfoot’s extended aeration mechanical wastewater
treatment plant was violating its Snake River NPDES discharge permit
when Keller Associates was retained to assist in resolving the problem.
After a detailed wastewater treatment plant audit and development
of an upgrade master plan for the treatment facilities, the plant
was upgraded to handle the large BOD loadings coming from a cheese
plant, a large regional dry cleaning facility, a beef processing
plant, and process water from two major potato processing facilities.
The plant upgrade included the addition of a bioselector basin; additional
aeration basin capacity; headworks modifications; a new thermophilic
digester; solids thickening, dewatering, and storage facilities;
and new office and maintenance facilities. This project was awarded
the 2003 Outstanding Civil Engineering Award (OCEA) by the Southern
Idaho Section of ASCE and was presented to the Pacific Northwest
Council of ASCE to compete regionally.
SOLUTION
Keller assisted the City in securing two US Congressional Appropriations
(STAG) grants, totaling $3.72 million, through Senator Craig and
Representative Mike Simpson. A $1 million economic development grant
and a $345,000 ICDBG grant were also secured. These grants provided
the core funding that was utilized to develop the remaining funds
through an ordinary and necessary revenue bond. The new treatment
plant upgrade included bioselector and aeration processes that removed
phosphorus, ammonia, nitrates, and over 95 percent of BOD and TSS
as the solution to the NPDES discharge permit violations. |
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