Don’t let  foreign matter spoil rendered products

What is foreign matter contamination?

Costly product recalls can occur if pet food,
tallow or bone meal has foreign matter contamination.

Example problem area:

Boluses (used for nutritional and medicinal purposes) that are not removed can be milled into smaller pieces of metal and ceramic. Fine stainless steel springs can stay in the meal causing major problems for domestic or
farmed animals if consumed.

Impact on the market

The presence of foreign matter in rendered products such as metals and plastics can cause serious concerns to the end user that can lead to product rejection, customer complaint and financial claims.

Importers of Australian tallow, meal, pet food and stock feed are becoming stricter on plastics and metal contaminants.

Most wanted contaminants

Hunt down and remove the main perpetrators:

Animal ear tags
Animal ear tags
Boluses
Boluses
Rubber gloves
Rubber gloves
Elastic bands
Elastic bands
Carton liners
Carton liners
All sources of metal
All sources of metal

Solutions and prevention

1. Renderers should play their part in ensuring raw materials meet specifications.

2. Introduce approved supplier programs and annual supplier audits.

3. Check equipment at abattoirs during audits - screens, flues and raw material bins.

4. Quality assurance should include elimination of foreign matter in raw material for rendering in HACCP program and procedures.

5. This includes kill floor procedures and work instructions with an emphasis on cleaning procedures and waste disposal.

6. Further use of reverse polarity magnets can eject aluminium, brass, copper, tin and other non-ferrous metals.

7. Infra-red light waves can detect polymers present in composted supermarket waste. Once polymers and most metals are detected the individual jet blows the contamination into a waste bin.

8. Renderable devices, such as plugs made from starch or bio-polymer, are available to replace polymer devices.

9. Renderable devices leave no residue or contamination when rendered.

Most foreign matter in raw material is not magnetic and cannot be easily removed via the screening process, hence should be kept out of rendered materials.

Industry standards

In addition to site raw material specifications, the ARA (Australian Renderers Association) has released guidelines regarding raw material contamination.

Raw materials must be fresh and free from foreign matter.

Best practice rendering requires removal of contaminants prior to processing.

Industry standards recommend raw material should not be contaminated at the source.

Contaminated raw material is downgraded in value. This means the one piece of plastic can impact profits for the entire Australian rendering industry.

Removal of contaminants after rendering is costly, more difficult and reduces yields.

Let us work together to eliminate customer complaints and the cost of claims associated with foreign matter.

Educational materials

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