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Case Study

Brazil Poultry Slaughterhouse Wastewater Treatment: 86% BOD Reduction and FOG Elimination in 90 Days

A Brazil poultry slaughterhouse cut effluent BOD 86%, from 860 to 121 mg/L, and lifted plant efficiency from 55% to 86% in 90 days with Wastewater Treat.

86%
lower effluent BOD
55 to 86%
plant efficiency
90 days
to full recovery

Results at a glance

MetricBeforeAfter 90 days
Effluent BOD860 mg/L121 mg/L (86% lower)
Plant efficiency55%86%
Surface FOGThick cap, blocked oxygenEliminated
OdorStrongEliminated
Flow treated2,250 m3/day (8-day HRT)Stable, in compliance

The problem

A poultry slaughterhouse wastewater plant serving a 90,000-bird-per-day operation in Brazil was in biological treatment failure. Excess surface fats, oils, and grease (FOG) were generating strong odors, suppressing oxygen transfer in the aeration tank, inhibiting biological activity, and pulling treatment efficiency down. The plant treated 2,250 m³ per day on an 8-day hydraulic retention time, but effluent BOD measured 860 mg/L and efficiency had dropped to 55%, creating compliance pressure and unstable operation. The plant needed a bioaugmentation program that could digest the FOG load, restore oxygen transfer, and rebuild performance without major process changes. The trial tested whether Wastewater Treat (WT), a high-CFU industrial wastewater bacteria blend, could address FOG, odor, and BOD together across a high-strength meat processing waste stream.

Before, during, and after

Before treatment: a thick FOG layer capped the aeration surface, blocking oxygen transfer and driving strong odor, with effluent BOD at 860 mg/L and plant efficiency down to 55%.
Before
Before treatment: a thick FOG layer capped the aeration surface, blocking oxygen transfer and driving strong odor, with effluent BOD at 860 mg/L and plant efficiency down to 55%.
During
With continuous Wastewater Treat (WT) dosing, FOG buildup and odor were eliminated at the source within the treatment train. Effluent BOD fell from 860 mg/L to 121 mg/L, an 86% reduction, and plant efficiency rose from 55% to 86% within 90 days, restoring stable biological performance and bringing the facility back into compliance. With FOG digested and oxygen transfer restored, the aeration tank could again handle the high-strength waste stream without upsets.
After
With continuous Wastewater Treat (WT) dosing, FOG buildup and odor were eliminated at the source within the treatment train. Effluent BOD fell from 860 mg/L to 121 mg/L, an 86% reduction, and plant efficiency rose from 55% to 86% within 90 days, restoring stable biological performance and bringing the facility back into compliance. With FOG digested and oxygen transfer restored, the aeration tank could again handle the high-strength waste stream without upsets.
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Product used in this trial

Wastewater Treat (WT)
Animal Waste Treat (AWT)

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