What are the dangers of swill oil entering the feed industry? Key points for feed oil safety supervision
Swill oil usually refers to oil recovered and refined from swill and waste fats, also called recycled oil or waste cooking oil. This kind of oil should enter regulated waste fat processing channels, but because of its low price, it has long been a "hot commodity" in the eyes of illegal traders. In previously exposed cases of overseas swill oil imports, a large amount of swill oil was imported by traders and then found to have illegally flowed into feed uses, triggering strong public concern about feed oil safety and exposing loopholes in the supervision of imported oil flows.
Why swill oil flows into the feed industry
Feed production needs added fats to provide energy, especially poultry and aquatic feed, which have relatively large demand for oils and fats. Legitimate feed oils have relatively high costs, while swill oil, after simple refining, looks not much different from ordinary oil but is considerably cheaper, so some companies take risks driven by profit. In addition, edible oils and feed oils fall under different regulatory links; if imported under the name of feed ingredients, tracking the final use becomes significantly harder, easily creating regulatory blind spots.
What are the dangers of using swill oil as feed oil
During repeated use and long-term storage, swill oil undergoes rancidity and oxidation, and indicators such as acid value and peroxide value are often seriously excessive. It may also contain harmful substances such as aflatoxins, heavy metals and benzopyrene. Feeding livestock and poultry with such oil can, in mild cases, affect feed intake and growth rate, and in severe cases damage organs such as the liver, reduce disease resistance and induce disease. More alarming is that some harmful substances can remain in meat, eggs and milk, ultimately affecting human health through the dining table, forming a chain of risk from the breeding end to the consumer end.
How regulators and breeders can prevent it
From the regulatory perspective, the focus is on controlling the source and flow: strictly verify the declared use of imported oils and require companies to provide source certificates and inspection reports; implement raw material procurement ledgers and sample retention systems for feed production enterprises so that sources can be checked and destinations traced; and ensure that inspection covers key indicators such as acid value, peroxide value, moisture and impurities, and mycotoxins. Specific standards and implementation requirements shall be based on the current regulations published by the local feed authorities.
For breeders, there are also practical ways to prevent this: first, choose qualified and reputable feed and oil suppliers, and request and keep batch inspection reports; second, conduct simple sensory checks. Legitimate feed oil has normal color and odor. If there is a pungent rancid smell, blackened or cloudy color, or abnormal sediment after standing, be on high alert; third, do not covet "cheap oil" that is obviously below the market price; fourth, report suspicious oil products to the local agriculture and animal husbandry or market regulatory authorities in a timely manner, and keep purchase receipts for tracing.
Feed is the source of breeding, and feed safety is the first gate of food safety. Only by keeping swill oil out of the feed industry can the animal health at the breeding end and the quality of agricultural products on the dining table be truly guaranteed.