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At a Wisconsin commercial grease trap, a Grease Treat program cut BOD from 2,328 to under 200 mg/L and TSS from 2,660 to under 230 mg/L, both about 91% lower, and dropped pumping cost from $1,029 to about $20 per service.
| Time | BOD (mg/L) | TSS (mg/L) | Pumping cost |
|---|---|---|---|
| Start | 2,328 | 2,660 | $1,029.00 |
| 30 days | 1,086 | 568 | $376.41 |
| 60 days | 651 | 289 | $190.61 |
| 150 days | 600 | 236 | $185.44 |
| 300 days | Under 200 | Under 230 | $20.00 |
A commercial grease trap serving a high-load food preparation kitchen in Wisconsin was overwhelmed by fats, oils, grease, and suspended solids. At the start of the program the trap measured 2,328 mg/L BOD and 2,660 mg/L TSS, and it needed pumping so often that each service ran about $1,029.
Conventional maintenance could not keep up with the FOG load. Solids rebuilt quickly between cleanouts, odors persisted, and the constant pumping made the trap one of the most expensive line items in the kitchen's operation.
The trap was put on a Grease Treat maintenance program, dosing the high-CFU FOG-digesting blend into the trap so the bacteria could break down fats, oils, grease, and solids in place instead of letting them accumulate. The strains are selected for high lipase activity and stay active in the low-pH, high-grease conditions inside a loaded trap.
BOD, TSS, and pumping cost were tracked from the start through 300 days so the change could be measured rather than estimated.
Before: grease trap running heavy, BOD 2,328 mg/L, TSS 2,660 mg/L, and pumping about $1,029 per service.
After: BOD under 200 and TSS under 230 mg/L, both about 91% lower, with pumping down to roughly $20 per service.
The improvement was steady and measurable. By 30 days BOD had roughly halved to 1,086 mg/L and TSS had already dropped from 2,660 to 568 mg/L, with pumping cost down to about $376 per service. By 60 days BOD was 651 and TSS 289, and the numbers kept falling through the 150-day mark.
By 300 days BOD was under 200 mg/L and TSS under 230 mg/L, both about 91% below where they started, and pumping had fallen to roughly $20 per service. Digesting the FOG at the source turned the trap's biggest recurring expense into a minor one, cut the odor, and kept the system stable under a continuous kitchen load.
It seeds the trap with high-CFU facultative bacteria that produce lipase and biosurfactants, which break down and digest the fats, oils, grease, and suspended solids that drive BOD and TSS. Because the material is digested in the trap rather than just pumped out, the organic and solids load keeps falling instead of rebuilding between services.
In this Wisconsin trap, pumping fell from about $1,029 per service to roughly $20 as solids stopped accumulating, close to a 50-fold drop. Your savings depend on your current pumping frequency and hauling rates, but cutting the solids load is what shrinks the bill.
Improvement is steady rather than instant. In this program BOD had roughly halved by 30 days and kept dropping through 60, 150, and 300 days, reaching about 91% lower BOD and TSS by the end. Heavier loads and colder traps take longer.
Yes. It is a biological product that works on the organic grease and solids layer and is used routinely in grease traps, lift stations, and waste lines. It does not rely on caustic or acidic drain chemicals, so it will not attack your plumbing.
Usually, yes. Much of the smell from a loaded trap comes from grease and volatile fatty acids going septic. As the bacteria digest that material, the food source for odor is reduced, which is why odor was minimized as the trap cleaned up.
Commercial and institutional kitchens, restaurants, food courts, and any high-load foodservice grease trap or lift station. It suits both a single busy kitchen and a shared trap serving several tenants.
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