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fat reclamation," Pierce said. "After we
started annual training for plant team
members years ago, the DAF sludge
reduction was evident at wastewater."
The second stream is primarily warmer to hot boiler condensate,
scrubber and cooling tower bleeds, and
cooked process waters that are aerated
for cooling and then processed through
an anaerobic lagoon. Both streams
are ultimately sent to the four-stage
Bardenpho nitrification denitrification
process. The entire process operates
with under a supervisory control and
data acquisition (SCADA) system.
In terms of reclaimed wastewater, RVAF exceeds its total nitrogen
limits by 96 percent. The finished
products facility reuses approximately 220,000 gallons per day or
about 80 million gallons per year of
the reclaimed water for plant wash
down, pump shaft packing gland
water seals as well as hydrolyzer
packing glands for hydrogen sulfide
reductions in the workplace.
Reuse water is also being used
for a recently installed blood dryer,
displacing approximately 40 million gallons a year of potable water
otherwise used for flushing the system as well as rinsing and charging
evaporators and preheaters.
Continuing efforts at
RVAF and beyond
RVAF excels beyond reclaimed
water quality treatment and reuse with
an active commitment to protecting the
environment. Ongoing efforts over the
course of RVAF's recognition as an elite
Clean Water Award facility include:
■ Actively managing the reuse or
recycling of traditional items
such as cardboard, pallets, aluminum, used oil and filters, batteries, lightbulbs and electronics.
■ Cutting and baling of grasses
for hay by a local farmer, with
proceeds donated to the local
school district's Future Farmers
■ Redirecting all out-of-spec materials (about 255.6 tons since
October 2015) from the landfill,
yielding a useable product via
composting facility benefitting
the local economy.
■ Exceeding general permit storm
water benchmarks using a system
of storm water settling ponds
developed in collaboration with
Arkansas Tech University students
who selected and planted native flora also serving as a natural habitat.
The RVAF team didn't rest on its
laurels after receiving its 2016 Clean
Water Award recognition. Bat houses built by local FFA high school
students were placed on buildings to
address flying insects.
"Once the bat houses are inhabited, we will participate in summer surveys and submit data to the
Arkansas Game and Fish Commission
bat coordinator," Wells said.
They are also seeking recycling
options to dispose of plastic films
contaminated by raw materials.
"We are working to develop a program during the next 12 months that
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