Blåbjerg Biogas

Blåbjerg Biogas A.M.B.A.
DK-6830 Nr. Nebel


Blåbjerg Biogas had a Westcome heat exchanger prototype, type V0, installed in 2006.

2 new Westcome heat exchangers, type V1, were installed in 2007 with 2 sections in each heat exchanger of which 3 sections were for slurry / slurry and 1 section for water / slurry.

Test of Prototype 2006

New model in 2007

2016, after 9 years

Throughout 9 operating years and a throughput of more than 1.2 million m biomass / slurry, the heat exchangers have worked to our great satisfaction without any operating problems and without any repairs or maintenance required throughout the period.

The reactor temperature is 53°C, the raw slurry is 8°C – 15°C, dry matter input is 7 – 8%

In the past 4 years, we have not cleaned the heat exchangers of struvite but kept them clean only by adding a low-molecular polymer dosed in the ratio 20 ppm / biomass.

We have thus not had any stoppages in order to clean the heat exchangers which are running non-stop 24 / 7 and without reduced yields due to fouling.

After almost 10 years’ operation, we can hardly note any operating wear on the inside surfaces of the heat exchangers.

Daaily Manager at Blåbjerg Biogas

/Bent Junker Jespersen


Herning Vand

Herning Vand A/S
Herning Renseanlæg (Sewage Treatment Plant)
Ålykkevej 5
7400 Herning, Denmark


After more than 7 years’ operation, works manager Jan Ravn is very satisfied with the Westcome heat exchanger.

The West-Jutland tone comes out clearly, and the attitude is clear when asking Jan Ravn of Herning Vand to relate to whether the investment in a Westcome heat exchanger was a good idea in terms of rationalising production at the company’s biogas plant.

– As a starting point, we were excited about what was presented to us and our experience from operations since commissioning of the heat exchanger in week 42, in 2009, fully confirms our positive first-hand impression.

The supply is 6m3 / primary sludge / h with a solids content of 3.8%.

The digested sludge mass has a temperature of 55°C which is exchanged with the raw sludge having temperatures of between 6°C-14°C, depending on the seasons.

The efficiency of the heat exchanger is 70% which fully meets what we were promised, says Jan Ravn.

The heat exchanger is integrated in the digesting tank plant and a valve control system has been implemented consisting of 2×4 two-way motor valves that change side and flow direction in the heat exchanger once a day which means that the heat exchanger has not been cleaned at any time during its seven years of operation.

Manager at Herning Vand

/Jan Ravn