Filter Press for Lignin Production 

The Chempolis Ltd. Oulu Pilot is now fully equipped for the production of lignin on an unprecedented scale for various applications.

With the support of our Roxia Smart Filter Press (fully automated filter press), Chempolis is now able to supply significant quantities of lignin from a range of sustainable sources.

About the customer

Chempolis Biorefining Park, located in Oulu, Finland, is a leading provider of innovative biorefining technologies for energy, biofuel, oil, paper and chemical industries and companies. The refinery functions as Chempolis’ main hub of innovation where also full-scale testing services for clients and partners are offered. 

Chempolis’ formico® technologies facilitate the sustainable production of bioethanol, dissolving pulp, cellulosic sugars, biochemicals, and sulfur-free lignin from various lignocellulosic raw materials. These processes are adaptable to utilize hardwood and softwood. Also non-wood and non-food biomasses like straw, bagasse, corn stover, EFB, and bamboo can be utized.

Chempolis Roxia
Chempolis’ headquarters is located in Oulu, Finland, 200 kilometres south of the Arctic Circle.

Introduction to Lignin

Lignin itself is a complex organic polymer derived from plant cell walls. Dealing with lignin and its washing and dewatering can be quite complex. However, Chempolis has developed a unique process that recognizes the value of both – the solid and liquid fractions. To achieve this, they conducted thorough research and performed numerous filtration tests in cooperation with Roxia. The primary objective was to establish an automatic filtration process that included cake washing. Additionally, separating different filtrate flows for subsequent processes was a vital component of their solution.

The collaboration was initiated in September 2020 and continued through multiple filtration campaigns, test unit rentals, and process development meetings, leading to the installation of a Roxia test filter at Chempolis’ Oulu site in 2022.

Automatic filtration with the help of the Roxia Smart Filter Press containing 10 chambers and a filter volume of 86 litres

Installation and Results

Roxia’s adaptable approach made it possible to incorporate frequent modifications in the feed material throughout the process development. Thanks to the close collaboration and shared goals, Roxia was able to overcome the obstacles and find the perfect solution for Chempolis’ filtration needs – The Roxia SFP (Smart Filter Press). The need for automatic operation, effective cake wash, compliance with European safety regulations, and an innovative design perfectly aligned with Chempolis’ requirements. Roxia’s commitment to safety, European manufacturing, and a clean, compact design made it the obvious choice.

After successfully implementing the new Roxia system containing a fully automated filter press (Roxia SFP) with 10 chambers and a filter volume of 86 litres, the Chempolis Oulu Pilot is now able to produce lignin on a larger scale for various applications. This improvement allows Chempolis to offer significant amounts of lignin derived from sustainable sources.

Lignin Production
Ready-produced Lignin derived from sustainable sources with the help of filter presses.

Long-term Cooperation between Chempolis and Roxia

With the successful management of the complexities involved in lignin processing, Chempolis confirms its plans to include Roxia products also in future. Despite the challenges faced, this journey has provided both parties with valuable knowledge, and a partnership that continues to grow. Chempolis envisions Roxia’s continued assistance in optimizing their processes, supplying necessary spare parts, and offering tailor-made filter cloths to enhance filtration performance.

“The collaboration with Roxia’s experts, their extensive knowledge, and seamless teamwork have played a crucial role in overcoming obstacles and attaining remarkable achievements in our lignin processing endeavours” states Keijo Hytönen, General Manager at Chempolis site in Oulu.

In conclusion, Chempolis’ journey with Roxia exemplifies the power of collaboration in solving complex challenges in biorefining processes, paving the way for sustainable solutions in lignin filtration and production.

Let’s talk and find the best solution for your business!

  • Select your location

  • Select field

Contact us

If you have something on your mind, just let us know! We are more than happy to answer all your inquiries.


Goran Metiljevic

Product Manager, Powerflo Solutions

+61 2 8005 2131

Kauko Tanninen

President Central Asia

+7 708 102 24 66

Sergey Petukhov

Technical Director Central Asia

+7 916 213 21 76

Retha Schoeman

Sales Engineer Sub Saharan Africa and South Africa

+27 83 825 6805

Dan Stenglein

Sales Director North America

+1 667 500-2591

Sebastian Alcaino

Regional Sales Director South and Central America


Ronald Gaspar

Area Sales Manager South and Central America

+51 9 7973 5424

Sun Lin

Area Sales Manager, General Manager China

+86 21 52679628

Roope Kupias

Customer Support Manager, Finland

+358 40 860 4720

Jesse Saira

Sales Director, Nordic & Baltics

+358 44 276 2338

Dirk Otto

Sales Director Central Europe

+49 (0) 2102 420 707

Thorsten Zogalla

Area Sales Manager SFP Filters, Central Europe

+49 7307 92170 116

Klaus Göde

Service Engineer Central Europe

+49 (0) 162 408 88 58

Kimmo Angeria

Head of Field Services, Industrial Automation

+358 400 104 977

Markus Saloniemi

Director, Industrial Automation

+358 40 571 9520