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Wastewater Treatment Facility Improvements, Horseshoe Bend, Idaho This
project includes design and construction management for improvements
of the existing wastewater treatment facility including the construction
of two geomembrane lined lagoons, lift station improvements, an
influent screen, an aeration system, a UV disinfection system,
a laboratory/control building, and related improvements. This
project is being funded through Rural Development, Idaho Community
Development Block Grant, and City funds. |
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This
project consisted of the design and construction of a wastewater
treatment facility which incorporated innovative technology. This
included implementation of improvements designed to reduce total
suspended solids being discharged into the Snake River. This technology
consisted of installing a Geotechnical grid system over the lagoons
and growing duckweed in each cubicle of the grid. Project Completion
Date: 1992. |
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Wastewater System Improvements Project-Emmett, Idaho The
City of Emmett owns and operates a wastewater treatment lagoon
to treat its municipal wastewater, and the biological characteristics
of the lagoon are inadequate to treat the hydraulic and chemical
make-up of the influent flows. The performance of the waste-water
treatment facility has caused multiple violations of the City's
National Pollutant Discharge Elimination System (NPDES) permit
with respect to biochemical oxygen de-mand (BOD), total suspended
solids (TSS), ammonia, and pH levels. Holladay Engineering analyzed
existing flow, chemical, and biological data and gathered new
flow data to determine the cause of poor treatment performance.
High hydraulic loading from groundwater influent to the sewer
system as well as the biological characteristics of the lagoon
are reducing treatment performance. Several facility upgrades
were analyzed and a recommendation was made to eliminate wastewater
permit violations. |
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Ultraviolet Disinfection Pilot Study Project-Middleton, Idaho Holladay
Engineering designed and implemented an ultraviolet (UV) disinfection
pilot study for the City of Middleton. The pilot study was completed
to provide proof of concept and performance for scale-up design
of a UV disinfection system for treatment of lagoon effluent.
Tasks included design of wastewater testing protocol, selection
of pilot UV equipment, sampling, data analysis, generation of
supportable conclusions, report generation, communicating project
findings with local regulators, and scale-up design. Data analysis
was focused on the effects of process parameters on inactivation
of fecal coliform bacteria. |
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