Vegger Biogas

Vegger Biogas Plant

Vegger Biogas is Denmark’s oldest biogas plant from 1986 which was part of the Danish Village Energy Plan. A major expansion was completed in 2014 which involved replacing the old bark filter plant with a safe and effective biofilter that could match a much larger odour formation and meet the stricter regulations for odour elimination.


During the tender phase, BBK was the only biofilter manufacturer able to guarantee odourless plants without complaints from neighbours. During the design phase, there was close cooperation on the design of the air ventilation, with BBK using e.g. smoke mists to pinpoint extraction and piping. The new plant was therefore fully upgraded from its first day.

The biofilter is built in two sections in concrete elements. BBK has supplied the extraction system/piping, buildings and filter solution.


150.000 tonnes of biomass/year


7,1 million m3 biogas/year

Filter capacity

30.000 m3 /time


Pre-filter 45 m2
Biofilter 230 m2


8-15 years depending on concentrations in the air being passed through the biofilter

“Our ambition was to deliver cheap energy to the village and not expose the neighbours to odours. We have achieved this in full. After a seamless delivery by BBK, we now have a service contract with quarterly visits and technical service. BBK is often at the forefront of improvements and there have been no critical comments by the environmental control authorities after their inspections. I can’t recall a single issue during our partnership, and the communication has been straightforward. Everything has gone very smoothly.”

Richard Bengtsen, Operations Manager, Vegger Biogas

Vegger Biogas converts sludge, slurry and biological waste into biogas. Built for 60 t/day biomass, it has now been expanded to 400 t/day. The much larger quantities handled in a smaller community place high demands on the identification of processes and a dense piping system for extracting odours from tanks, warehouses, etc., so that all odours are removed in the filter system and nothing escapes.


FFV - wastewater

FFV collects wastewater in Fåborg Municipality and treats it at a central sewage treatment plant. Over time, several smaller plants have been closed and instead replaced with long pipelines with pumping stations to transport the wastewater to treatment. This has led to the formation of harmful hydrogen sulphide in the pipes. Time has been spent trying to resolve this issue using various chemical methods or with carbon filters. A lot of money has been invested but without any obvious effect.

A particular problem is the large fluctuations in hydrogen sulphide formation known as “peaks”, as high concentrations destroy odour filters, and must be evened out to achieve effective purification. This requires efficient monitoring and management of the plant’s biological processes


2,000-14,000 m3 wastewater/24h


8,5 million m3 biogas/year

Filter capacity

500 m3 air/hour

Filter solution dimensions

Pre-filter 2 x 2.5 m. biofilter incl. technical space: 2 x 3.5 m


Expected > 10 years

“The release of hydrogen sulphide from a pumping station was a long-standing challenge. There have been complaints about bad smells from unhappy neighbours, especially in the summer. We tried different ways to solve the problem, but it was first with the help of measurements and equipment from BBK that we found a solution. They fitted a pre-filter and a biofilter and these have removed the vast majority of odours. Once the plant is fully run in, we will certainly use it elsewhere. BBK were very responsive and flexible in solving our problems.”

Arne Hansen, Operations Manager, FFV Wastewater

Biofilters at the Fåborg pumping station were installed in 2020 and are a new model from BBK with modular biofilters for decentralised plants. This was the precursor to a major MUDP project which aimed to minimise environmental nuisance and costs from the formation of hydrogen sulphide in wastewater pipes. BBK’s role in the project is to scale down biofilters that can be used effectively in smaller systems in combination with Cloud-based management of biological processes.