Reducing: TSS (Total Suspended Solids), BOD (Biological Oxygen Demand), Ammonia,
H2S (Hydrogen Sulfide), and Sludge Reduction in a Chicken Processing Plant.
A large chicken processing and rendering plant in Southeast Georgia was faced with
numerous problems associated with the treatment of wastewater at the plant. The plant
has a daily flow of 1.8 million gallons of water. The first problem was a heavy fats,
grease and oil build up on the surface of a 10,000 gallon grease trap located down-line
from the rendering building. The solids build up on the surface of this grease pit
would exceed 2.5 feet and forced the plant operators to physically remove the cap
with a backhoe once the thickness of cap began to reach the overflow level of the
pit. The second problem was high TSS (750-1100 ppm), COD/BOD (1400-1800 ppm), and
ammonia nitrogen (50-70 ppm) levels in the plants two aeration ponds. These ponds
are in sequence with the first pond having a capacity of 4.5 million gallons and
the second having a capacity of 14 million gallons. The plant has a land application
permits which allows for irrigation of hay fields with the treated wastewater. The
third problem resulted with high H2S levels being generated by the aeration ponds.
To address the sludge cap problem on the grease pit Bio10grz was applied through
a pressure sprayer at a rate of 8-ounces per gallon directly onto the surface of
the cap. One quart of concentrated product was applied per treatment. The cap was
treated twice each day. Within 7 days the cap was reduced to approximately 5 inches
of tan foam. Treatment continues at the same rate twice daily.
To address to TSS, COD/BOD, ammonia nitrogen, and hydrogen sulfide problems in the
aerated ponds Bio10 was the recommended product. Pond #1 (4.5 million gallon capacity)
was shocked with 75 gallons (17 ppm) and Pond #2 (14 million gallon capacity) was
shocked with 175 gallons (12 ppm). The shock treatment was applied with a high pressure
hose to provide a more uniform coverage of the pond surface area and allow for better
blending of the product into the wastewater. A daily maintenance program was implemented
where 5-gallons (2.8 ppm of the daily flow rate) of product would be metered into
pond #1 at the influent point.
There was a significant reduction in hydrogen sulfide odors with 48 hours of treatment.
After 30 days of treatment the TSS and COD/BOD levels on average were reduced by
60-65%. The ammonia nitrogen levels were reduced by approximately 85%. (see charts
on following pages). The maintenance application rate of 5 gallons per day continues.
The OrganicPro products used in this application far exceeded original expectations.