Filtration technology

Over 60 years' experience in solid-liquid separation

We have expertise in mechanical solid-liquid separation on the basis of both pressure and vacuum. To separate the solid particles, filter media made of textile or metallic materials and of composite materials are used as the basis for the filter cake. Often there will also be a washing process to improve the purity of the filter cake or to increase the yield of the liquid phase. Solid-liquid separation can be carried out in continuous or batch operation.

In practice, a careful analysis must be undertaken for every application in order to determine the optimum process and technology. In the field of mechanical solid-liquid separation, this requires not only a comprehensive understanding of the theory, but also broad practical knowledge and wide-ranging experience of the various alternatives. Tests in the laboratory or on a pilot scale can also provide conclusive confirmation.

BHS has specialized in cake filtration for more than 60 years. We supply a broad range of products for both batch and continuous processes. The number of applications that have been implemented is in four figures. All BHS filters are characterized by the fact that they work with a comparatively thin cake.

BHS also offers filters for complex tasks that have to meet specific regulatory and validation requirements. GMP, CIP, ATEX and other requirements can naturally be fulfilled.

BHS offers its customers the opportunity to use a variety of test filters, as well as a modern technical center and chemistry laboratory in Sonthofen, Germany. This ensures that an optimal solution can be found to satisfy your needs.

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Filtration application questionnaire (PDF / 129 KB)
Filtration application questionnaire

The PDF form includes a questionnaire that asks for information we require to assess your filtration challenge. The information you provide allows us to plan industrial-scale filters and prepare lab trials, if applicable.

Size: 129 KB

BHS filtration technical center

Link to tests at BHS technical center

Technical article

Continuous Pressure And Vacuum Filtration Technologies as Alternatives to Batch Filtration Operations

Chemical Industry Digest
Sept 2017
September 2017
PDF (1.8 MB)
Continuous Pressure And Vacuum Filtration Technologies as Alternatives to Batch Filtration Operations

This paper discusses the selection of the filtration process systems: continuous pressure and/ vacuum filtration through a process of laboratory and pilot testing. These tests enable problem analysis, technology selection and scale up which help in optimum filter selection.

Size: 1.8 MB

Combination filtration of pressure, vacuum and clarification technologies for optimum process solutions

March/April 2013
April 2013
PDF (817 KB)
Combination filtration of pressure, vacuum and clarification technologies for optimum process solutions

Filtration experts, over the years, have discussed combination filtration and debated its definition. In the realm of cartridge filtration, simply defined, a combination filter is one that does at least one other processing job at the same time as filtering a suspension. For example, this could be carbon canister which removes both suspended and dissolved components. In water applications, a combination filter removes bacteria, sediment, chlorine taste and odor, and scale. In lubrication oil filtration, combination filtration refers to full-flow and by-pass flow filtration. Finally, for small scale process filtration, combination filtration is installing bag and cartridge filtration systems in series.

There is, however, a new definition of combination filtration that transcends the standard approach and will assist process engineers with trouble shooting and “idea-generation.” The approach relies upon the slurry analysis and testing to uncover the “process symptom” and then develop a process solution called “combination mechanical slurry conditioning and filtration.” This article discusses slurry testing and process analysis and then illustrates seven case history example installations showing “combination mechanical slurry conditioning and filtration” including data in Appendix A.

Size: 817 KB
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