Poultry kill and processing
The poultry plant processes 400’000 birds per day, generating 8’706 cubic meters of wastewater laden with proteins, feathers, offal, and bone.
Preliminary screens remove the coarse solids while the rest of the emulsified oils, fats, and proteins are sent to a DAF system for recovery.
Two DAF units separate solids from the water and send them to recovered product coookers where they are concentrated into an oily product which is sold to a renderer.
DAF effluent is biologically treated in a 3’785 m³ aeration basin.
A third DAF unit is used to separate biomass and remove TP from the biological treatment system. Effluent from this DAF meets the requirements for discharge to a local waterway.
Equipment supplied
PCL-90 DAF (2)
PCL-180 DAF (1)
F-12 flocculator (2)
F-14 flocculator (1)
Recovered product tanks (2)
DAF sizing calculations
Hydraulic surface loading rate
=
Feed flow + recycle flow in m3/h
/
Effective surface area in m2
=
363.4 + 54.5 m3/h
/
x m2
= 2.4 m3/m2/h
=
174.1 m2 required
Solids loading rate
=
Weight of TSS in feed in kg/h
/
Free surface area in m2
=
907.2 kg/h
/
x m2
= 73.2 kg/m2/h
=
12.4 m2 required
| Design parameters | Discharge requirements | |
|---|---|---|
| Flow | 8.706 m³/d | |
| TSS | 1’500 - 2’500 mg/l | 30 mg/l |
| FOG | 2’500 mg/l | 10 mg/l |
| COD | 6’800 mg/l | |
| BOD | 4’200 mg/l | 30 mg/l |
| TP | 0.2 mg/l |
)