Key Message

The need for improving the performance of existing plants in dairy facilities is becoming more usual. The increasingly stringent regulations, or the underperformance of the existing plants because of a load increase, require the implementation of advanced technologies for improving the quality of the treated water. Berghof tubular UF is an efficient, compact and robust technology for effluent polishing after the conventional aerobic or anaerobic systems.

Direct filtration for effluent polishing

As long as the discharge requirements are getting more and more demanding, and the interest in water reuse is growing, some conventional biological treatments are far from being sufficient: tertiary treatment is therefore required.

Berghof tubular UF is an efficient and competitive technology for removing the suspended and colloidal matter that get outs from the previous treatment – typically a conventional activated sludge system. In this way, a high-quality effluent is obtained (free of solids, turbidity < 0.2 NTU, SDI < 3). Moreover, the ability of tubular membranes to handle high concentrations of suspended matter allows the operation with high recoveries (> 95 – 98%), thus minimizing the rejected volume.

Dairy effluent polishing - the process

When there is a need for improving the effluent quality in existing plants, tubular ultrafiltration is installed after the biological treatment, usually based on conventional activated sludge or SBR plants. The effluent from the clarifier is fed to the ultrafiltration membranes, producing a polished permeate and a concentrated reject, which is sent back to the upstream DAF process, if it exists, or to the biological reactor.

The UF permeate can be discharged to the sewer or surface water, and it is also possible to reduce the water footprint by reusing this stream, either directly or after removing the dissolved compounds with reverse osmosis.

Dairy effluent polishing 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 ultrafiltration membranes.  

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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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Customer stories

Case Studies

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

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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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