Separator's Digest - GEA Westfalia Separator Group

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Badische Winzerkeller is the second German winery to introduce the Westfalia Separator vinex process for recovering must with decanters. a large and modern winery was established in 1952 with Badischer Winzerkeller in Breisach; over the years, this has developed into one of the most powerful operations in the state. CareSSed By the Sun Westfalia Separator vinex in Badischer Winzerkeller Interview with Wilfried dörr Badischer Winzerkeller also acted as the central winery in Baden. 37 fully supplying wine-growing cooperatives with a growing area of around 2500 ha are affiliated to Badischer Winzerkeller; these wine growers deliver their entire harvest of grapes to the central winery for pressing. In addition, further partially supplying cooperatives deliver a contractually defined percentage of their harvest in the form of must to Breisach. Overall, around 6000 wine growing operations are included in this cooperative. the catchment area of the affiliated operations stretches from Lake Constance right up to tauberbischofsheim, the Badisches Frankenland. Wilfried dörr, director for Oenology / Production in Badischer Winzerkeller, has been working in the wine industry since 1978 as a graduate engineer of oenology, and throughout his entire work has been very committed with regard to new processes, 16 Separator’s Digest 3 | 2008 GEA Westfalia Separator Process Photos: Mike Goldwater and primarily processes featuring centrifugal separation technology, starting with the high-performance centrifuge and tartrate stabilisation and ending with solid / liquid separation of the grape mash. In the mid-90‘s, he commenced trials for juicing the grape mash with decanters. the Württembergische Weingärtner-Zentralgenossenschaft (WZG) in Möglingen, at that time under his leadership, introduced the Westfalia Separator vinex process into in-
WeStFaLIa SeParatOr vinex – the advantaGeS at a GLanCe Continuous method of operation Procedure reduces the process times, the amount of labour input and thus the variable unit production costs No longer necessary to allow mash to stand for up to twelve hours, and the corresponding mash tanks are also no longer necessary Very gentle technology dustrial practise with its entire harvest for the first time in 2003. the Fachhochschule Wädenswil, Switzerland, had previously carried out a comprehensive oenological process comparison between a press and a decanter. Separator‘s digest spoke with Wilfried dörr about Westfalia Separator vinex. Only a continuous system can be used for operations of this order of magnitude Separator‘s Digest: Mr. Dörr, how was the Westfalia Separator vinex process installed in Badischer Winzerkeller? as a large operation, we receive all grape types and all quality stages from all wine growing regions in the area. We receive approximately 60 to 80 different batches every day. Badischer Winzerkeller had previously used a continuous process in pressing technology, with scroll-type presses which had been installed during the 1970‘s and which now meant that a reinvestment was necessary. It was clear that only a continuous system could again be applicable for an operation of this order of magnitude. If a company such as Badischer Winzerkeller wanted to operate on a discontinuous basis with pneumatic tank presses, which is actually common practise in the pressing industry, an installation featuring around 25 tank presses would have been necessary. this also does not take account of the manpower necessary for operating such a installation. a further possibility of continuous operation, apart from the scroll-type press, would have been the band press, which is used in many applications in the fruit juice field, although it involves microbiological problems in the trub. the only meaningful alternative was the decanter. GEA Westfalia Separator Process 17 Closed and thus hygienic juicing Easy to clean Low coarse trub content Short pay-back times Sensory quality fully comparable with that of the traditional methods Suitable for all sizes of operation Can be used for red grapes as well as white grapes Gentle juicing system Separator‘s Digest: What are the main quality advantages of Westfalia Separator vinex in your opinion? decanters were tested at the beginning of the 1990‘s in the wine industry, although unsatisfactory results were achieved at that time. the problem with the grape mash is that it is not a homogeneous material. Sometimes it contains more grapes, sometimes more seeds, and sometimes more skin. Only after certain aspects had been adapted was the decanter able to cope with this inhomogeneous mash. For instance, the drive of the scroll had to be regulated, in other words, the power consumption had to adjust to the solids content, depending on the consistency of the mash. Or an additional aspect: when the mash is pumped into the machine through a stationary stainless steel tube when the bowl is rotating at 2500 revolutions per minute, this results in high mechanical strain. It was possible to eliminate this problem by ensuring that the inlet tube rotated together with the bowl. the mash is accelerated in the feed tube, and enters the machine with approximately the same speed as the bowl. this results in a gentle juicing process. In the analysis, it can be established that a decanter does not expose the product to any mechanical strain. We do not have any increase in tannin. an increase in tannin would mean that seeds had somehow been crushed. We do not want to have this bitter seed tannin in the wine. We want to have the polyphenols from the skin of the grapes and therefore require a juicing system which is as gentle as possible. this is guaranteed because the seeds are immediately conveyed to the periphery Separator’s Digest 3 | 2008
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Page 39 and 40: the training centre at GEA Westfali

Separator's Digest - GEA Westfalia Separator Group

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