Ultrafiltration has become increasingly popular in recent years. In combination with a suitable stabilisation process, concentrates and juices of the highest quality can be produced. Adsorber technology opens up promising perspectives for stabilisation.

Ultrafiltration plants have been operated successfully worldwide for filtration of fruit juices and concentrates for years. Many producers of clear, bright fruit juices regard these plants as a key component of their production lines. In the fruit juice industry, ultrafiltration plants with organic pipe modules are a prominent feature nowadays. The Supercor modules (fig. 1) with ½ inch pipe diameter provide high operational safety and long run times, coupled with uniform filtration characteristics.
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Over 70 million hl of beer are "cold filtered" with membrane filters annually worldwide. Breweries in the Far East account for the largest portion. Activities of German breweries are comparatively modest. Can we learn from breweries in the Far East? Using various examples, the following article emphasises not just equipment used for membrane filtration but also covers the benefits and advantages of this technology from a marketing standpoint.

In the German brewing sector, the technology of membrane filtration as a method for extending the shelf-life of beer has been discussed for more than 10 years. It has been technologically praised, at other times dismissed because of excessively high operating costs, and then again very often hailed as a future-oriented technology.
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The Raible-Test was unveiled in 1990 as a "simple method for evaluating the filtration characteristics of beer". The authors relate the filtration test to the historical evolution of filtration in general and to developments in the evolution of the evaluation of filterability in particular. Based on the authors’ research results, the potential and forte of the filtration test are assessed and quantified.

It has become common practice when writing scientific articles dealing with aspects of brewing technology to cite only those publications which have been published over the last 20 years. This approach ignores pioneering and fundamental sources from preceding years. Thus, the introduction will briefly deal with development of beer filtration. Lorenz A.e.
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Subsequent to a validation period of over six months, the Ecoflux KF1600/50 kieselguhr precoat filter was tested and evaluated by the State Testing and Evaluation Institute for Brewery Equipment of the Technical University of Munich in Weihenstephan. Optimal results were obtained in terms of operating cycle time, kieselguhr consumption, microbiology, haze and oxygen concentration in the filtrate, these results are discussed in this article.

A microbiological monitoring test of the new SeitzSchenk candle precoat filter KF1600/50 Ecoflux was carried out in a German brewery on November 30th, 1999. At the same time, pressure relationships, oxygen values, kiesel-guhr consumption as well as hazes measured from two different angles were checked. Klaus Litzenburger.
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SeitzSchenk Filter Systems GmbH of Bad Kreuznach/Waldstetten in Germany have developed a new generation of candle filters to round off their product program. When used for beer filtration, these provide significant benefits in terms of ease of operation and economics. The first results are discussed in this article.

In the brewing industry, candle filters are, together with horizontal filters, one of the most common filtration systems for filtration of beer. These filters are used especially for pre-filtration as precoat filters, customarily using kieselguhr as a filter aid. SeitzSchenk Filter Systems GmbH, Bad Kreuznach/Waldstetten in Germany, have developed a new generation of candle filters to round off their product program.
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In the context of the thesis of Marx (1), particle count as well as particle distribution were measured online in seven large breweries in Germany during beer filtration, using the new PCS 2000 particle counting system from Seitz-Schenk. Kolczyk and Oechsle (2) have already given a detailed description of this particle counting system. The objective of the investigations was to test the particle counting device under industrial conditions and prepare a particle balance in the filtration section of the brewery.

The portable instrument was connected to each of the sampling taps of the individual stations of the filter line. During filtration, measured values were recorded at the individual stations of the filter line every two minutes.
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In this article, a measuring method for on-line measurement which has been newly developed for beer filtration will be presented. Up to now this kind of measuring systems was mostly suitable only for laboratory use.

Among the numerous applications of cross-flow microfiltration (CFMF) in the food processing industry, beer micro-filtration represents a wide potential market and an interesting technological challenge. CFMF and its potential applications in brewing are presented here. The purpose of this paper is to show that rough beer CFMF is a technical alternative to the conventional dead-end filtration with filter aids (diatomaceous earth).

Following on the positive reaction to the 1996 Seminar, and in view of the many questions and problem areas arising since that time, E. Begerow GmbH & Co. company of Langenlonsheim/Germany organised another Filtration Seminar in 1998.

Though modern filtration techniques are used in beer filtration, the filter aids required are still prepared to a very large extent manually.

This contribution deals with structure, possible modifications and mode of action of silica sols used in unfiltered beer to improve filterability and raise colloidal stability. Test methods applicable to commercial situations are presented.