Food Safety and the IQF Process

Food safety concerns involving fresh produce can sometimes create the impression that all processed vegetables carry similar risks. They do not.

Fresh-cut vegetables that are intended to be eaten raw and IQF vegetables that are blanched, frozen, and later cooked follow fundamentally different paths from the field to the consumer.

For IQF vegetables, one of the most important differences occurs before the product is ever frozen: blanching.

Most IQF vegetables are washed, prepared, and then blanched before entering the freezing process.

Blanching exposes the vegetables to a controlled combination of temperature and time. In addition to helping preserve characteristics such as color, texture, and quality, the process serves as a microbial reduction or “kill” step before the vegetables are frozen.

This is an important distinction from many fresh, ready-to-eat vegetables.

Fresh lettuce, for example, may be washed and packaged but is normally consumed without another processing step capable of significantly reducing microorganisms that may have been introduced earlier in the supply chain.

IQF vegetables take a different route.

At Eckert, IQF peppers are washed, trimmed, blanched, inspected, rapidly frozen, and tested before shipment.

It is easy to assume that freezing sterilizes food. It does not. Freezing dramatically slows microbial growth, but some microorganisms can survive freezing and become active again after thawing.

That is why food safety in IQF processing depends as much on what happens before the freezer as on the freezing process itself.

The combination of sanitation, employee hygiene, equipment cleaning, process-water management, blanching, inspection, and finished-product testing creates multiple opportunities to control potential hazards before product leaves the facility.

Eckert’s IQF pepper production incorporates several controls as the product moves from receiving through finished goods.

These include:

• -Washing and preparation of incoming vegetables
• -Controlled blanching prior to freezing
• -Rapid individual quick freezing
• -Automated product inspection and sorting
• -Metal detection
• -Sanitation and equipment-cleaning programs
• -Process-water controls
• -Employee hygiene procedures
• -Microbial sampling and finished-product testing

At Eckert’s Mexico facility, process water also receives additional treatment including activated carbon filtration before being used in production.

No individual step replaces the others. Food safety comes from the entire process working together.

There is another important difference between IQF vegetables and many forms of fresh produce: intended use.

IQF peppers are commonly ingredients in products such as:

• -Frozen pizzas
• -Prepared meals
• -Omelets and breakfast products
• -Soups and sauces
• -Institutional and foodservice products
• -Further-processed foods

These applications typically involve an additional cooking step before consumption.

As a result, many IQF vegetables may undergo a controlled blanching process during production and later be cooked again as part of the finished food.

That processing path is very different from a fresh vegetable intended to go directly from the package into a salad or sandwich.

Food safety should not be evaluated simply by asking whether a product is fresh or frozen.

The Better Questions Are:

1. How was the product processed?
2. Was there a validated microbial reduction step?
3. How is process water managed?
4. What sanitation controls are in place?
5. Is the finished product tested?
6. How is the ingredient intended to be used?

These differences help explain why a food safety event involving one category of produce should not automatically create concern about another.

Modern IQF vegetable production is designed around preventive controls, rapid processing and carefully managed time and temperature.

No food-production system can eliminate risk entirely, and responsible processors should never suggest otherwise.

What the IQF process can do is provide several layers of protection before vegetables reach the customer.

For Eckert’s IQF peppers, blanching is an especially important part of that system. Combined with sanitation, inspection, rapid freezing, and product testing, it helps create a controlled processing environment designed to consistently produce safe, high-quality IQF ingredients.

Understanding the process is ultimately the best way to understand the difference between fresh produce and IQF vegetables.