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Case Studies & Field ReportsDry Processing

Dry Processing Technology

Sanitary Conveyor Boosts Food Safety and OEE for Nutrition Bar Maker

Increased customer demand prompted nutrition bar maker TruFood to boost its manufacturing capabilities.

By Sharon Spielman
TruFood’s nutrition bars

TruFood produces millions of nutrition bars each week, which are sold at retail and club stores throughout North America, Europe, Mexico and online. All images courtesy of Luxme

August 11, 2022

Delivering a convenient mixture of high protein, low sugar and essential nutrients, nutrition bars are experiencing a surge in popularity. The global protein bar market was valued at $4.66 billion in 2019 and is projected to reach $7.03 billion by 2027, according to a report by Fortune Business Insights. TruFood produces millions of nutrition bars each week for its brand partners, which are sold at retail and club stores throughout North America, Europe and Mexico, as well as through its network of online distributors.

In 2019, increased customer demand prompted TruFood to embark on an expansion project to boost its manufacturing capabilities. High on the list for improvement was the company’s ingredient delivery system—a multi-step manual process that required significant time and labor to prepare and transfer fine and coarse ingredient powders and inclusions such as chocolate chunks, soy crisps and cookie pieces to the mixer.

Tubular chain conveyor reduces risk
This tubular chain conveyer significantly reduces the risk of product recall due to cross-contamination.

Not only did they require an automated ingredient transfer solution that would increase yield and improve line efficiency, but it also needed to guarantee food safety by reducing the risk of allergen cross-contamination between changeovers for different product ranges.

After talking with several equipment manufacturers, TruFood opted for the SANILux tubular chain conveyor and Luxme’s problem-solving capabilities.

“As well as efficiently transferring screened and weighed powders and inclusions to the mixer, the ability of the SANILux to reduce the time required for a sanitary changeover and remove all allergens from the conveying system were ultimately behind our decision to partner with Luxme. Their willingness to work within our constrained space requirements also impressed us,” says Mike Berko, project engineer at TruFood.

Santized in 1 hour
This tubular chain conveyor can go from dry to dry, fully allergen sanitized, in just 1 hour.

Avoiding allergen cross-contamination

As a producer of nutrition bars with a wide range of certifications and claims—including kosher, non-GMO, organic, halal, gluten-free, fair trade and sugar-free—TruFood takes its commitment to avoiding allergen cross-contamination seriously. “Food safety is a critical responsibility for us as a food manufacturer,” says Berko.

The manufacturer faced a range of challenges when seeking to upgrade its manufacturing operation. “We work with mid-sized emerging brands as well as established consumer packaged goods (CPG) companies commercializing new product platforms,” explains Berko. “With this comes additional complexity, requiring sophisticated systems to protect and propel their brands. To better support these partners, we not only required more flexible and consistent operations, but also easier, more efficient changeovers and sanitation protocols. Sanitary design and ease of cleaning are forefront in our minds when evaluating any new solution.”

Chemical dosing skid
The chemical dosing skid ensures an efficient use of cleaning chemicals, leading to sustainability benefits in the form of reduced energy, chemical and water requirements.

Fully allergen sanitized in 60 minutes

To meet TruFood’s requirements, the conveyor supplier specified its food-grade, USDA-accepted SANILux tubular chain conveyor technology. An enclosed, self-cleaning system, it protects ingredients from atmospheric, airborne contaminants and other bacterial elements.

The conveying discs on the chain assembly for the clean-in-place (CIP) washdown application are approved by the US Food and Drug Administration (FDA). This conveyor maintains a safe and sanitized processing system, significantly reducing the risk of product recall due to cross-contamination. The automated CIP technology ensures the conveyor is fully sanitized in 60 minutes and is validated with allergen swab testing.

Pandemic pressures

The conveyor itself comprises a fixed drive and tension assembly, which automatically tensions the chain continuously during the process and regulates it according to friction, product flow, and variation in atmospheric/product temperature. Capable of 300, 500 or 1,100 ft3/hr capacities, the system is suited for the automatic conveying of all types of food, at any stage of receiving, processing and packaging.

The conveyor has been running successfully at the manufacturing facility since it was installed in May 2020, just as the COVID-19 pandemic was getting started. Keen to avoid any impact on the project, the two companies worked together in conjunction with the support of Solid Solutions to ensure successful integration.

TruFood’s in-house engineering team completed the installation work, with Luxme carrying out virtual commissioning. Although Luxme’s technicians have experience of performing virtual commissioning for clients outside of Canada and the US, this was a step into the unknown for TruFood. “Despite the unique challenges of COVID-19, the installation and commissioning of the new system was a success,” says Berko.

TruFood’s nutrition bars
TruFood produces millions of nutrition bars each week, which are sold at retail and club stores throughout North America, Europe, Mexico and online.

Intelligent automation

It was important that the conveyor could successfully interface with other upstream and downstream equipment on the line. Real-time communication with adjacent batch screening, weighing and mixing equipment is achieved over Ethernet, while a PLC interface receives and sends signals to coordinate operation of the conveyor with both upstream screening and downstream mixer. Running at speeds of 54 fpm to optimize process time requirements for multiple ingredients, the 8" diameter tubular chain conveyor has a maximum system throughput of 25,000 lbs./hr. TruFood is currently operating at approximately 80% capacity, as the system was specifically designed to accommodate additional future requirements.

Ensuring product quality

Besides fulfilling the nutrition bar maker’s need for a more efficient, more sanitary ingredient delivery system, the unit has also delivered further improvements. “The ability to consistently clean the conveyor to an allergen-free state is priceless, allowing us to confidently deliver products to our customers without the risk of cross-contamination,” says Berko. “In addition, decreased process steps for ingredient delivery and shorter sanitation times have contributed to a significant uplift in our production capacity. We are also benefiting from gentler product handling, meaning ingredients retain their size, shape, and appearance, and are delivered to the mixer intact. Ingredient fines have also been reduced, ensuring a higher quality product, and powder ingredient dosing to the mixer is now automated and repeatable, meaning we can be confident in the consistency of our products.”

The enclosed chain-in-tube construction creates a sealed conveying solution, eliminating waste spillage and the risk of external pathogens or allergens entering the material flow to the mixer. “This increases confidence in product integrity during the dry ingredient processing function, as well as reducing risk to personnel – the chance of water spillages and associated slips and falls, or contact with harmful chemicals during sanitation, have been eliminated,” says Berko. “In addition, because there is no variability in the sanitary washdown process—all parameters are pre-programmed and consistently repeated—false sanitary starts to production runs are prevented, minimizing waste. An efficient use of cleaning chemicals has also led to sustainability benefits in the form of reduced energy, chemical and water requirements.”

KEYWORDS: CIP/COP clean-in-place conveying hygenic design IIOT

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Sharon spielman authors

Sharon Spielman is former senior editor of Food Engineering magazine. She has more than 25 years of experience as a writer and editor for a range of trade publications, including those that cover food and beverage processing, restaurants and institutions, chefs, process heating and cooling, finishing, and package converting.

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