Arla Foods Cheese Production Line Expansion Falkenberg, Sweden

In 2001 Arla Foods formulated a strategic plan of centralisation in its Swedish and Danish operations to increase production through selective plant closures and increased investment in other plants. A total of 17 dairies were closed, with the rationalisation of 1,050 jobs at closing dairies and the creation of 350 new jobs at extended facilities such as Falkenberg. The cheese production line expansion at Falkenberg in southeast Sweden was announced in June 2003 as part of the centralisation plan. The company is the largest producer of rindless cheese in Sweden.

The company is investing over DKK2.3bn in several projects throughout Sweden and Denmark and the Falkenberg production line is part of this investment.The company’s aim has been to increase cheese production at the Falkenberg facility from the original level of 20,000t/y up to 35,000t/y during 2004 and then progress to 37,000–40,000t/y by 2008.

The expansion project has made the Falkenberg dairy the largest producer of cheese in Sweden. The expansion was completed by the end of 2003 and operational by the first quarter of 2004; the set production targets were achieved and have now even been exceeded towards the 2008 production targets of 40,000t/y. This is likely to be achieved by the middle of the year.

ARLA CONTRACTOR AND DESIGNER

The contract to design and install the new production line at the plant was awarded to Invensys APV, based in Crawley, UK, in a deal worth €4.5m. APV was acquired by SPX Corporation of the US in February 2008 and Chris Kearney, Chairman, President and CEO of SPX commented: "The acquisition of APV greatly enhances our process equipment operations serving key markets around the world, particularly in Europe and Asia Pacific.

"With the broad APV spectrum of proven process solutions, rich heritage of innovation and wealth of engineering expertise, we are better positioned than ever to capitalise on the growing global demand for flow technology products and solutions."

The criteria for the project set by Arla Foods were for the production line to fit into the footprint of the old equipment, for the end products to have the same quality and consistency as previously, and that the production line would be capable of rapid changeover from one product to another.

Allan Nilsson, the plant production manager said: "We were impressed by the innovation demonstrated in the Invensys APV engineering solution. It is very important to produce end products of a consistent quality, size and weight. Equally, the new line had to fit the same footprint as the old machinery. The expertise of Invensys APV in cheese production has resulted in improvements in the cheese industry by helping manufacturers increase capacity, drive down costs and increase return on investment."

NEW EQUIPMENT

The project included upgrading the process water system, starter culture system, Clean-In-Place (CIP) plant, overflow protection device (OPD) pre-press and mould filling unit. In addition there is a Sanipress final pressing system, which includes a high pressure mould washing system, a mould emptying unit and automated equipment that both fills and empties the salting racks of the immature and mature cheeses, respectively.

The control system for the production line is Invensys' WonderWare InTouch™ in conjunction with an In SQL database. To increase the production capacity of the Falkenberg facility, milk processing capacity also had to be expanded from 650,000l per day to over 1,200,000l per day. The contract for this milk processing capacity expansion was awarded to SWECO Plc; the assignment included the design, procurement and installation of the necessary equipment. Equipment installed included micro-filter equipment for filtration of milk for cheese production (to filter out any microorganisms).

A production line for the ultra-filtration of whey was also installed to separate proteins for refined whey products (whey protein additives for the food industry) and also a filter for reversed osmosis treatment of the permeate from ultra-filtration to concentrate the liquid for production of animal feed, which is sold as a by product (the cleaned water can then be disposed of in waste water systems and discharged to the environment). Equipment installed also included new compressors and icewater basins.

PRODUCTS AND PROCESSES

The production line at the Falkenberg dairy produces Gouda, Tilsiter and Havarti type cheeses. The products need to be of a consistent size after the final maturation process to simplify packaging and reduce costs.

The OPD pre-press produces a cheese block measuring 11.5m x 1.7m. A laser scanning system was developed by Invensys APV to ensure this block was of a consistent 170mm height before being divided into blocks and travelling by conveyer to the Sanipress mould. The Sanipress mould applies pressure to the cheese surface via a rubber membrane for a period of 45 minutes. This process removes any excess liquid and results in compressed cheese blocks, which are consistent in size, weight and quality. The mould sizes in the plant allow products of 360mm x 240mm or 760mm x 380mm. The weight accuracy of the cheeses is ±2.5% for Gouda and ±3.5% for Tilsiter cheeses.

CURDMASTER AGITATOR

Invensys APV installed Curdmaster cheese vats (30,000l capacity) at Falkenberg. The Curdmaster has special design features to minimise the loss of protein and fat from the curd and to give a more uniform size to the curd. The 'knives' on the tank agitator were designed to give clean cuts through the curd, thus reducing fines, fats and small particulates in the whey. Curd size can then be controlled to the optimum for the type of cheese being produced. The agitator shovels were designed to improve the lift of the curd in the whey and improve mixing.

The agitator speed has also been reduced to decrease the mechanical effects on the curds. The overall effect of these improvements means a decrease of fat and cheese fines in the whey of 35%, giving a much improved cheese yield and reduced waste.

RAPID CHANGEOVER

The new production line at Falkenberg allows easy changeover from the production of Gouda to Tilsiter cheese, which gives great flexibility. The wash-down and mould change have been engineered to minimise the down time of the production line during changeover or routine hygiene operations. The finished product sizes are either 360mm × 240mm or 760mm × 380mm and the plant has been geared up for these specifications.

FALKENBERG POWER AND SUSTAINABILITY

As far as sustainability is concerned the businesses (including the cheese production facility) and homes around all benefit from two very successful community power generation schemes. This allows them to generate 30% of their own power and also produce hot water for the community.

There are ten 660W wind turbines which can produce a combined 12.5GWh of electricity per year, an average power output of 1.43MW and also a solar array capable of producing 1.8GWh of electricity per year (also supplies hot water).

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