Filtration technology

Over 60 years' experience in solid-liquid separation

We have been specializing in cake filtration for over 60 years: The first rotary pressure filter was developed back in 1953. We manufacture filter and filtration systems for mechanical solid-liquid separation using pressure or vacuum filtration. All BHS filters are characterized by the fact that they work with a relatively thin cake. Our filtration solutions naturally meet specific regulatory and validation requirements such as GMP, CIP, ATEX, etc.

We have accumulated a great wealth of expertise, having implemented thousands of applications worldwide. The focus is on processes in the chemical, pharmaceutical, food and plastics industries, oil and gas as well as energy and resource extraction.

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. Customers benefit from our experience of six decades of work in filtration technology, as a broad portfolio is accompanied by process experience. This is why we look at the different process steps together with the customer in every single project, and weigh up alternatives against each other before we select the best solution for each case and implement it. Often preliminary tests in our in-house laboratory or on a pilot scale at the customer’s premise can provide final confirmation. Once the right process has been defined, it can easily be upscaled from laboratory to production scale.

We have various test filters that can be made available to you, as well as our modern technical center with an adjoining chemistry laboratory in Sonthofen, thus providing a range of possibilities to find the optimal solution to meet your requirements.

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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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