Key Message

Digestate biological treatment demands a robust technology. External tubular MBR copes with the digestate treatment with maximum efficiency: the bioprocess operates in a stable way, with the best nitrification rates. Berghof tubular membranes provide the smooth and reliable operation required by the operators of biogas plants.

Benefits of digestate treatment with MBR and tubular UF

The MBR consists of a biological reactor combining anoxic and aerobic stages for carbon and nitrogen removal, coupled to the Berghof tubular UF for biomass/effluent separation. This technology for digestate treatment has numerous advantages over the conventional biological processes and the submerged MBRs:

The external tubular MBR for dairy wastewater treatment has numerous advantages over the conventional biological processes and the submerged MBRs:

Highly efficient​

Highly efficient biological treatment: the operation at high MLSS concentration (12 – 15 g/L, up to 30 g/L) provides long sludge ages, which intensifies the biological activity and promotes the assimilation of slowly biodegradable organic matter.


Berghof Membranes developed B-SMART®, a customizable external membrane filtration system that can be designed with various features and functionalities.

Effluent Quality​​

Superb effluent quality: the tubular MBR produces a solid-free effluent, with turbidity lower than 0.5 NTU and SDI < 3. It can be further treated with RO systems allowing more than 99% removal for carbon, total solids and nitrogen. ​​​


Robustness against the complex composition of digestate. The filtration conditions in Berghof tubular UF are easily adapted to influent fluctuations, providing the most stable operation under any circumstance.​​

Compact and modular​​

Compactness and modularity: external tubular MBRs are one of the most compact technologies for digestate treatment. UF systems are 100% modular and very easily upgradable.


MBR Digestate treatment - the process

Digestate is the main residual product from biogas plants. The liquid fraction obtained in the decanter is fed to the tubular MBR, where organic matter and nutrients are removed by combining anoxic and aerobic reactors. The external tubular modules coupled to the biological process produce a free-of-solids permeate that can be pos-treated with reverse osmosis. The effluent is therefore discharged, fulfilling the strictest environmental regulations, or it can be reused for irrigation or other industrial purposes.

biogas digestate treatment MBR - PFD

Manufactured in Germany


Made in a state-of-the art LEAN-production facility, with highly-trained production personnel and materials of the highest quality.

With 50 years of experience and more than 2.000 projects worldwide, Berghof Membranes is the leading manufacturer of high quality tubular membranes.  

Tubular UF Membrane Modules

To prevent fouling and clogging, Berghof Membranes developed its line of robust tubular UF (ultrafiltration) membrane modules based on inside-out crossflow filtration. 

>> Read more

Membrane Skid systems

Berghof Membranes developed B-SMART®, a customizable external membrane filtration system that can be designed with various features and functionalities. 

>> Read more

Pilot systems & Labscale testing

Bridging the gap between lab-scale testing and manufacturing. Piloting gives you the confidence to apply the technology for your specific wastewater challenges.

>> Read more

B-CARE® Service and Support

The B-CARE® program is an end-to-end comprehensive program developed to support our OEM partners from piloting and engineering to operational system monitoring.

>> Read more

Case Studies

Our projects

50 years of experience and more than 2.000 project references across the globe.

Wastewater treatment system for dairy industry using advanced membrane technology

AnMBR | Dairy Industry

A dairy processor in Richland County, Wisconsin needed to find an efficient process to generate electricity and heat from their wastewater and to further treat anaerobic industrial wastewater.

>> Read more

wastewater system food and beverage

MBR | Food & Beverages

In order to meet the increasing demand, Holland Malt has decided to double its
malting capacity. For this the company needed high-quality permeate to reuse for production.

>> Read more

recovery of valuable material metal and mining

Direct UF | Titanium Recovery

Our OEM-Partner needed to design a robust and adaptable UF system that could keep up with the high-solid streams and conditions of this demanding process while minimizing OPEX and fouling. 

>> Read more

Think outside the box

When it comes to membrane filtration, think outside the box and contact Berghof Membranes today.

More than just a membrane supplier

Contact Berghof Membranes

Get in touch today


International Sales Office:
Agora 4, 8934 CJ Leeuwarden, 
The Netherlands

Contact Us

Phone : + 31 (0)58 8100 110

Follow Us