Compact AnMBR system for the Wisconsinbased dairy processor

Berghof Membranes, with its extensive experience in treating industrial effluent using PVDF tubular membranes, developed a compact AnMBR system for the Wisconsinbased dairy processor.

Biogas Plants

biogas plant
Biogas plants

Decades of experience.​​

Biogas generation and digestate treatment

A biogas plant is a waste-to-energy installation where different waste materials such as livestock manure, organic fraction of municipal waste, or residues from the agrifood industry are converted into biogas. Biogas is an environmentally friendly source of energy in form of heat, electricity, and even biofuels.

the use of biogas instead of the fossil fuels is drawing significant attention as a tool for tackling climate change and reducing the greenhouse gas emissions. Apart from the inherent sustainability, biogas also entails significant advantages such as easy storage and use under demand or the off-grid, localized energy production for on-site use.

The biogas plants are based in the anaerobic digestion process, consisting on a set of biological processes in which microorganisms digest the waste material in air-tight tanks, producing the mentioned biogas. Moreover, the so-called digestate is produced: it consists on the organic material left over after the digestion. Digestate is rich in organic matter and nutrients such as nitrogen, phosphorus and potassium. Therefore, it can be valorized as a high-quality fertilizer.

The use of digestate as a source of fertilizers requires certain treatment. The most conventional approach is to use centrifugation for liquid-solid separation. In this way, a solid residue and a liquid fraction (centrate) are obtained. Traditionally, the centrate has been disposed directly into the land for soil conditioning. This entails some benefits, as long as the organic matter and nutrients contained in the digestate are brought back to the land in form of nutrients, but has been shown to present certain limitations that can hamper the future consolidation of the waste-to-energy approach as an alternative to the conventional sources of energy. In this scenario, more advanced technologies for digestate treatment are required day after day for managing the digestate in a more sustainable way, better than direct land disposal.


Challenges for digestate management

Legal restrictions

For land spreading, limited mass of nitrogen applied per hectare.

Seasonal restrictions

For landfarming to be done in periods of maximum crop growth.


For land for spreading in areas with high livestock density.

As a result, the implementation of membrane technologies for digestate management appears as one of the best available technologies as long as it provides important benefits, not only for the environment but also for the biogas plant operators and farmers, such as: 

Benefits of tubular membrane solutions for digestate treatment​

As previously introduced, the waste-to-energy process for biogas generation produces the digestate stream as a recoverable product that needs to be adequately managed. The digestate presents difficult to biodegrade organic matter, a significant presence of suspended solids, and high concentration of nitrogen. Berghof tubular UF is applied in two different configurations according to the treatment objectives, the project’s particularities and of course, focusing on achieving the most competitive CAPEX/OPEX in each case.

The external tubular MBR allows removing the difficult to biodegrade organic matter and nitrogen and produces high-quality water for discharge or reuse. On the other hand, direct tubular UF preserves and concentrates the nutrients for valorization producing high-value biofertilizers with minimal use of chemicals.

Applications of tubular UF membrane technology for biogas plants

MBR | Digestate Treatment

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.
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Direct Filtration | Nutrient valorization

Berghof tubular UF membranes are used for nutrient valorization as a direct filtration process, with a reverse osmosis post-treatment usually applied for obtaining a concentrated and high-value biofertilizer.
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Please choose the application that applies to you.
Is your application not listed? Then please contact us.

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 ultrafiltration membranes.  

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Pilot systems & Lab testing

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B-CARE® Service and Support

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

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Case Studies

Our projects

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


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

food_beverage (2)

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.

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