DIRECT UF
NUTRIENT VALORIZATION

Key Message

Organic waste management is nowadays one of the best examples of circular economy, producing renewable energy and valorizing the nutrients contained in waste products. With proven references worldwide along with leading OEMs dealing with digestate treatment and construction/operation of biogas plants, we can be the best partner for bringing out the best in any new or existing waste-to-energy project.

Direct filtration for 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.

Tubular UF membranes remove the particles, colloids, and macromolecules. The ability of tubular membranes to handle high concentrations of suspended and colloidal matter allows the operation with high recovery, even when dealing with complex and high-loaded digestate. Particulate carbon and nutrients are partially removed in the UF reject stream, which is sent back to the centrifugation for recovery as dry material that can be reused in agriculture. Most of the nutrients are preserved and recovered in the UF permeate: with SDI values lower than 3, it presents the optimum quality to be treated with a final two-pass reverse osmosis system. The RO reject consists of a concentrate liquor containing dissolved nutrients (NPK) to be used as high-value fertilizer, whereas the RO permeate is a high-quality treated water complying with the most stringent requirements for discharge or reuse.

High quality
fertilizer

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.

Highest effluent
quality

The RO reject consists on a concentrate liquor containing dissolved nutrients to be used as high-value fertilizer, whereas the RO permeate is a high-quality treated water complying with the most stringent requirements for discharge or reuse.

 

Highest recovery rates

The ability of tubular membranes to handle high concentrations of suspended and colloidal matter allows the operation with high recovery, even when dealing with complex and high-loaded digestate.

Nutrient valorization - the process

Digestate is the main residual product from biogas plants. The liquid fraction obtained in the decanter can be managed for nutrient valorization. Tubular modules are used in direct filtration mode for separating the suspended solids and macromolecules. Most of the nutrients are preserved and recovered in the UF permeate, which is subsequently treated in a two-pass reverse osmosis system. The RO reject is a concentrated liquor containing nutrients, to be recovered as fertilizer. The RO permeate is high-quality water complying with the most stringent requirements for both discharge and reuse (irrigation or other industrial purposes).

Nutrient valorization UF PFD

Manufactured in Germany

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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. 

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Membrane Skid systems

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

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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.

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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 and 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.

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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.

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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. 

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Think outside the box

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

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

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