Bühler enters a new era in milling technology

Bühler has announced a game-changing shift in grinding technology in a move that is set to drive product quality, consistency, and profits in the milling industry.

Bühler is heralding a new age in milling technology with the launch of Arrius, a fully integrated grinding technology for milling wheat, durum, rye, barley, corn, and spelt.

The launch follows a fundamental rethink of the traditional grinding methods that lie at the heart of the milling process. By redesigning each technology component, Bühler has produced an integrated and self-adjusting grinding system that is a radical step change in how millers are able to control the quality and consistency of their product. Other benefits include cutting energy costs, increasing staff safety, speedy installation, remote digital control, improved food safety, and reducing the initial outlay needed for plant investment.

Arrius is an integrated grinding system
With Arrius it is possible to better control the grinding process of the product and increase starch damage by up to 10% if required

Addressing the milling industry’s challenges

These advancements come as the milling industry faces a number of commercial challenges with clients demanding ever-increasing consistency and higher product quality. In a highly price-sensitive and competitive market even the smallest deviation in production parameters goes straight to a miller’s bottom line. This is happening as food safety regulations tighten and millers report difficulty finding properly qualified and skilled staff.

Addressing these challenges will require ever-greater automation. Arrius is set to play a key role as the milling industry evolves towards autonomous mills capable of self-adjusting to optimise production parameters.

Arrius automatically adjusts to raw materials

At the heart of the Arrius step change lie the sensors in the feeding module and the roller pack enabling greater control of the product flow and grinding process. It means Arrius is able to automatically adjust to the characteristics of the raw material. Double-sided sensors in the robust new roller pack allow millers, for the first time, to continuously measure the grinding force of the rollers. This unique feature allows the miller to control the grinding process closely and thus optimise product characteristics for their specific market.

Up to 10% starch damage increase, up to 10% less energy costs

Besides the particle size distribution, starch damage is a parameter that can be influenced as precisely as never before. With Arrius it is possible to better control the grinding process of the product and increase starch damage by up to 10% if required.

Energy is a significant cost driver for millers, so Arrius has also been designed with an integrated drive and gearbox, resulting in energy cost savings of up to 10%.

Arrius works with a remote app
Arrius’s new ease-of-use features includes a remote app that can be loaded on smartphones or tablets from which an operator can control all grinding parameters from anywhere within the mill’s network

Remote control and new benchmark in operational safety

Arrius’s new ease-of-use features includes a remote app that can be loaded on smartphones or tablets from which an operator can control all grinding parameters from anywhere within the mill’s network.

New food safety features include a feeding module designed for total product discharge. A streamlined design and increased aspiration in the grinding chamber also cut product deposits. The hygienic levelling feet that support the machinery are designed to improve food safety by enabling total under-machine cleaning. An electronically lockable cover and hand guard protection provides a new benchmark in operational safety to protect staff.

Lower building costs, installation time cut to one-third

Thanks to the integrated drive and switch cabinet Arrius can be flexibly positioned in the mill and quickly installed. Arrius can reduce the cost of building investment as it makes a complete floor obsolete. Thanks to the integration of components and reducing the number of power and data cables from around 10 to only three, Arrius can be installed in a third of the time.

Stefan Birrer, head of Business Area Milling Solutions at Bühler, says: “We have been building mills for decades and we realized that if we wanted to keep running them in the same way, then we had maxed out on most of the existing concepts. Fully leveraging the potential of digital technologies, while also transferring methods from other industries demanded a complete restart. It meant we had to embark on green field engineering. High-precision autonomous milling is not a luxury, it will become key to remaining successful in a tough market environment for millers.”

Views from the first customers

Commenting on the new technology, Dan Dye, CEO of Denver-based Ardent Mills, who has been working as a development partner with Bühler on the project, says: “Arrius is a perfect fit and our people are excited about it. Arrius will enable us to deliver the best flour quality to our customers through precision milling. With Arrius, Bühler is setting a new industry standard for high-end flour milling applications.”

A second development partner, Mike Peters, managing director of the UK-based flour milling company Whitworth Brothers, says: “We have a strong passion and drive for food safety, reliability, quality, and consistency. And following the development work we have done with Bühler and the tests we have run in our plants, we are very satisfied that it can deliver on these attributes.”

Franz Rhomberg, managing director of Vorarlberger Mühlen in Austria, has also given the new technology a massive thumbs up. “We can only be successful when we are more innovative than our competition. That’s why we have decided to completely renovate our 200-ton swing-mill with Arrius,” says Rhomberg.

Ardent Mills and Whitworth Brothers have chosen to install Arrius in their new plants after a trial period, while Vorarlberger Mühlen has been operating the system in commercial operation for over two years already.



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