Our mission: Transforming materials into value

We help companies in the process industry to increase and improve production worldwide: Whether for the chemical, pharmaceutical, power generation, and food and feed industry, we leverage our process technology expertise to modify basic materials in order to deliver added value to our customers.

Our know-how: filtration, drying, mixing and reacting

We are one of the world’s leading suppliers of components and systems for filtration, drying, mixing, and reaction processes. We have been developing and optimizing processes for more than 65 years. With experience gained in more than 3,500 projects, we always find the right process solution for you. We provide process expertise to assist you from the initial feasibility study through to implementation of the most suitable process equipment.

Benefits at a glance:

  • Optimizing processes & increasing efficiency
  •  Solutions for batch and continuous processes
  •  Individual process consulting
  •  Outstanding process expertise



Cake filtration is what we do. We provide advice and assist you in a wide range of separation projects, study each individual process step and then find the right filtration solution for you.



Drying is one of our core competencies. We keep the product in constant movement to ensure high process efficiency, up to high temperature ranges.



We have intimate knowledge of all aspects of mixing, which allows us to deliver the results you require in terms of homogeneity and product characteristics – even in highly complex mixing tasks.



We have expertise in a number of chemical conversion processes. Experienced in dealing with challenging reaction conditions, we design the appropriate reactor system.

Our portfolio: Standalone and integrated system solutions

Our standalone and integrated system solutions for mechanical, thermal, and chemical engineering applications tailor-made to your specific individual needs. We draw on our experience in developing complete systems, expertise in system integration, and extensive technology portfolio to achive maximum process efficiency.

Rotary pressure filter (RPF)

A single rotation of the drum entails a number of different process steps, demonstrating the many facets of filtration.

Horizontal dryer (HTC-T/HTK-T)

Ultimate drying performance with optimized energy consumption.

Indexing belt filter (BF)

This type of vacuum filter is particularly gentle on sediments.

Vertical dryer (AVA HVW-T)

Short process times with gentle product treatment.

Candle filter (CF)

A compact system to automatically and fully clarify turbid liquids

Horizontal mixer (HTC/HTK)

Optimal mixing quality with short mixing times

Rubber belt filter (BFR)

Reliable, high-precision filters for rapidly settling solids.

Vertical mixer (AVA HVW)

Gentle and intensive mixing with optimal complete discharge.

Pressure plate filter (PF)

Delivers high throughput rates for difficult-to-filter suspensions

Ringlayer mixer (AVA HRM)

High throughput rates with compact dimensions.

One solution, one partner – maximum efficiency and reliability

You appreciate having a partner for your project who assumes responsibility for the entire technical process? Then optimize your production with integrated process solutions from BHS. Our professional interface management examines the entire process chain, taking every detail into account. You benefit from a functional, turn-key solution.

Chemical recycling powers the circular economy

June 2022
Chemical recycling offers help to solve the problem of plastic pollution. Some companies have taken on this task and developed various processes to reintegrate used plastics into the circular economy. Focusing on PET (polyethylene terephthalate) as one of the top three plastics produced worldwide, these processes upcycle plastic waste into virgin grade materials. Filtration technology from BHS-Sonthofen Process Technology plays the key role in the purity of the products from which virgin PET is made.

BHS technology used for the innovative HALOSEP recycling process

February 2022
The EU wants at least 50 percent of household waste to be recycled and the rest to be used as a source of energy in waste incineration plants. However, waste incineration produces ash – a hazardous waste contaminated with salts and heavy metals that must be disposed of in special landfills, which involves long transport routes and high costs. The Danish power plant operator Vestforbraending uses the HALOSEP technology developed and patented by the Swedish group Stena Recycling, a process solution that makes it possible to dispose of ash as normal waste. In this project funded by the European Union, technology from BHS-Sonthofen is used for two steps at once.

Reactive ashes: Italy's largest energy supplier uses AVA mixers

December 2021
Fly ash, which is produced during incineration for energy generation, contains highly reactive substances such as free lime (CaO). For this reason, it must not go to landfill untreated, but must first be conditioned in a multi-stage process. In order to carry out this demanding process safely and efficiently, one of Italy's largest electricity suppliers equipped its power plant with AVA mixers from BHS-Sonthofen.

Focus on the customer: shortened delivery time for cell inserts

February 2021
Keeping downtimes to a minimum is the goal of any efficient production - which is why the replacement of parts and maintenance work should take place in the same time window if possible. This only works with a partner who puts customer requirements first. An internationally active chemical company ordered cell inserts for the BHS rotary pressure filter with a standard delivery time of eight months - but needed them a whole two months earlier. BHS made this early delivery possible to keep to the customer's schedule.

FGD gypsum: indexing belt filter deployed in Scandinavia

November 2020
BHS-Sonthofen is helping a power plant in Scandinavia transform a waste product back into a raw material: high-purity FGD gypsum with a residual moisture content of 10% (90% solids) can be resold directly to the construction materials industry. Since 2007, the power plant has been operating a flue gas cleaning system that uses a BHS indexing belt filter (BF). An additional filter has now been ordered. The combustion processes produce flue gas that is contaminated with sulfur compounds. Milk of lime is used to remove the sulfur compounds. Gypsum slurry is produced as a by-product, the residual moisture content of which must be brought down to 10% and any corrosive compounds need to be removed. The BHS indexing belt filter performs both of these tasks using its efficient cake washing. The system has been running smoothly since it was installed.

Moistening incinerator bottom ash with the BHS pug mill

October 2020
Waste is turning into an increasingly important source of raw materials. Even incinerator bottom ash still contains a large number of materials that can potentially be recycled. Metals such as iron, copper, and aluminum make up about ten percent of the ash. But what happens to the non-recyclable fraction? It must be deposited in landfills in a safe manner for as long as possible. However, operators of waste incineration plants face the challenge that incinerator bottom ash emits a considerable amount of dust. A North American waste incineration plant operator therefore decided to humidify the ash using a total of five BHS pug mills. The mixers of type AVA HTK now reliably convert the ashes into a dust-free, transportable product at three sites.

Dryers for high-purity plant proteins

September 2020
Plant proteins often form an essential part of a vegetarian or vegan diet, which is why they are in high demand. However, several process steps are required to obtain high-purity plant proteins suitable for human consumption from almonds, sunflowers or quinoa, for example. One of the challenges is the final drying process. BHS-Sonthofen has supplied a special dryer for this purpose to a German plant protein producer.

Indexing Belt Filter (BF) Used for Herbal Extract Production in Switzerland

October 2019
A Swiss pharmaceutical company has successfully deployed an indexing belt filter (BF) to produce an herbal extract using an extraction and filtration process.

Utilizing egg yolk powder effectively thanks to continuous filtration and drying

April 2019
An internationally operating pharmaceutical company extracts phospholipids from egg yolk and further processes the by-product into an additive for animal feed. Thanks to technological solutions from BHS-Sonthofen, the company succeeded in optimizing its processes. The solutions consisted of a continuous belt filter and a horizontal contact dryer from BHS, both of which are ATEX compliant and designed in accordance with GMP.

New approaches for the removal of catalysts from API suspensions

January 2019
The pharmaceutical industry has changed considerably. This is particularly the case for safety measures in the production of pharmaceutical substances (so-called APIs – Active Pharmaceutical Ingredients). This also applies to the removal of catalysts from API suspensions in particular, a processing step that has a direct impact on the quality of pharmaceutical products. BHS-Sonthofen supports companies from the pharmaceutical industry in using new filtration solutions that boast improved efficiency and reduce environmental impacts in the production of active ingredients.

Retrofitting in amino acid production: BHS supplies rotary pressure filters for the dietary supplement industry

September 2018
L-threonine is an essential amino acid in both the animal and human diet and is produced on an industrial scale across the world. An American manufacturer of dietary supplements was using outdated horizontal automated filter presses to filter L-threonine crystals. BHS-Sonthofen tested its different filter systems for use in this challenging filter application, and, together with the customer, decided on rotary pressure filters as a high-performance alternative that also optimally suits the existing production process.

Optimal coffee extraction with rotary pressure filter

April 2018
BHS Rotary Pressure Filters of type RPF contribute to a highly concentrated, high-quality extract. And these are the features that count when it comes to producing food and dietary supplements. In terms of coffee, the consumer always expects a product whose flavors were extracted in a mild, low-temperature process. Manufacturers of soluble coffee benefit from higher yields using the same or even less water – and consumers enjoy particularly rich flavors.


New Representation in Austria

April 5, 2024
BHS-Sonthofen has partnered with Schwarzäugl ITS&T to strengthen its presence in Austria and Slovenia. Schwarzäugl has expertise in mechanical process engineering and will enhance BHS‘ coverage in both countries. In Austria, Schwarzäugl ITS&T is succeeding long-standing BHS partner Reinhard Bog Werksrepräsentanzen, who is retiring after working with BHS for over 30 years.

Two rubber belt filters for fly ash processing in Singapore

March 20, 2023
Collectively known as Tuas Nexus, the facility is an innovative and sustainable solution to meet Singapore’s long-term solid waste management and used water treatment needs. Tuas Nexus is the integration of the National Water Agency (PUB)’s Tuas Water Reclamation Plant (Tuas WRP) and the National Environment Agency (NEA)’s Integrated Waste Management Facility (IWMF). The “FAW” procedure from system supplier AIK Technik AG is used to treat the fly ash of the waste gases produced in the waste incineration process. BHS-Sonthofen supplied two particularly large rubber belt filters for this purpose.

BHS announces partnership with Soitra

March 13, 2023
BHS-Sonthofen announced its partnership with Soitra, an Italian supplier of process and packaging equipment for the pharmaceutical, chemical and food industries. The agreement enables customers to purchase high-value technologies for filtration and drying, and benefit from bundled process expertise and after-sales service from a single source.

BHS-Sonthofen at FILTECH 2023 in Cologne

February 2, 2023
Designing energy-efficient solid-liquid separation - at FILTECH 2023 from 14.-16. February in Cologne, the Process Technology division of BHS-Sonthofen will be presenting its current filtration solutions. With more than 440 exhibitors and a large international conference, FILTECH is the largest and most important filtration trade fair worldwide.

BHS-Sonthofen will not participate in Achema 2022

January 31, 2023
Due to the renewed postponement of dates by Dechema and the continuing uncertainty caused by the pandemic, BHS-Sonthofen has cancelled participation in Achema 2022 in Frankfurt.

Candle filters from BHS-Sonthofen now offer modular clarification solutions

October 25, 2022
The production of plastic additives or the recovery of catalysts share a common need. They both require fully automated clarification filtration to enable high throughputs and versatile cake treatment. With a new, modularized product range for candle filters, BHS-Sonthofen Process Technology now offers further significant advantages including shorter engineering times and lower costs.

BHS-Sonthofen Process Technology at POWTECH 2022

August 25, 2022
BHS-Sonthofen Process Technology will showcase its process expertise for filtration, drying, mixing and reacting at POWTECH from 27 to 29 September 2022. The company offering includes components, individual machines and integrated system solutions. A key focus this year is on high-temperature drying applications. Visitors can look forward to seeing an HTC-T horizontal dryer in action at booth 108 in hall 4a.

Three indexing belt filters for the production of hydrofluoric acid

May 16, 2022
BHS-Sonthofen Process Technology has supplied three larger than average indexing belt filters for the production of hydrofluoric acid. The key requirement for the design of the belt filters was particularly high chemical resistance given the strong acidic product attributes of the source material. BHS employed acid-resistant metallic materials and special plastics which offer maximum safety combined with high product quality. The plant has been in operation since the end of 2021.

Vacuum dryers for active pharmaceutical ingredients (API)

April 28, 2022
BHS-Sonthofen is providing two identical GMP-vacuum dryers including controls for a international manufacturer of active pharmaceutical ingredients and advanced intermediates. Commissioning in the customer cleanroom is scheduled for the second quarter of 2022.

BHS-Sonthofen receives record number of incoming orders in the Process Technology division

March 23, 2022
BHS-Sonthofen closed the 2021 financial year with a record number of incoming orders in the Process Technology division. Despite the pandemic, the company saw incoming orders in this business unit increase by 26 percent year-on-year. The process technology experts are optimistic about 2022, as this year, BHS-Sonthofen Process Technology is introducing new, digital features for its rotary pressure filter. Another milestone will arrive in the form of modularized, standardized product range for filters, mixers and dryers.

Vacuum dryer for the production of mineral salts

December 10, 2021
For a German manufacturer of mineral salts, BHS-Sonthofen is supplying a vertical vacuum dryer and a mixing cooler with system control. The mineral salts are used in nutritional supplements, animal feed, pharmaceuticals and cosmetics, among other things. The entire plant will be commissioned in the first half of 2022.

Four vertical mixers on their way to Asia

November 25, 2021
BHS-Sonthofen supplies four large mixers for the production of cellulose derivatives to an international customer in Asia. The continuously operating vertical mixers feature an intelligent control solution. Thanks to the BHS helical mixers, the customer achieves the best possible homogeneity of the cellulose. The product is used as an excipient in the pharmaceutical industry.

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Find a sales representative

Find your personal contact person on site. We are there for you worldwide.