Ice cream waste fat can be recovered for reuse, Penn State finds
Researchers at Penn State discovered that centrifugation alone can recover about 95% of fat from ice cream waste, without needing enzymes. The recovered fat could substitute for pork fat in animal feed or be converted into compounds for pharmaceuticals and cosmetics. This process offers a cost-effective way to reduce waste and recover value from a nutrient-rich byproduct.
The research team partnered with Perry's Ice Cream in New York, examining waste from four production batches with fat content ranging from 1.8 to 10.3 percent. Ice cream waste typically contains three to five times more fat than raw cow's milk, making it a concentrated source of recoverable material. The findings appear in the journal Cleaner Engineering and Technology.
Economic modeling by co-author Rui Shi's team suggested recovered fat could be sold for roughly 40 cents per kilogram to break even. Profitability scales with the fat content of incoming waste and with processing volume. The recovered fat may substitute for choice white grease in animal feed or serve as feedstock for pharmaceutical and cosmetic compounds.
This research could offer food processors a low-cost route to turn a disposal problem into a revenue stream. If the centrifugation method scales successfully, ice cream manufacturers may reduce waste disposal costs while supplying animal feed producers and chemical manufacturers with a cheaper fat source. Smaller operations with lower-fat waste streams might see thinner margins, but larger facilities could benefit most. The approach may also ease environmental pressure from organic waste in landfills, though broader adoption depends on industrial validation beyond this single-facility study.