Entering the Danish Market

We have received an order in Denmark! Our system will reduce odour at a waste reception and pre-treatment facility. The feed stock will consist of organic household waste and packed food waste from food chain companies in the greater Copenhagen area. The system will have a capacity for expansion, meaning that as the waste volume/odour volume increases, we can add components into the proposed system should the plant be expanded. How great is that? Easily expandable system without a need to retrofit!

Entering the Finnish Market

Centriair is very proud of our first ColdOxTM unit installation in Finland. The customer is building a Biogas plant where the process air and hall air need to be treated. Together with our country director for Finland – Jan Ronnberg, we managed to get a tremendous start to our operations in that region. Contact us directly if you want your very own ColdOxTM system.

Polish Market. An ordinary story of extraordinary project.

In Spring 2020 Centriair had signed an agreement on delivery of odour treatment technology to a fish meal producer in Poland. This is the second time our company takes on a project dealing with fish waste and we fully understand all the causes of the smell problems, arising from fish processing, and the best ways to treat them.


With our ColdOx system combined with acid scrubber we created a unique unbeatable technology whose performance matches to none. This is so far our 5th project in Poland and we are proud of our sales team, Polish distributors and mainly genius engineers that make our products so great.

Burning Empty Calories – Energy Waste in Food Processing


You have probably heard the term ‘empty calories’, referring to food with low or no nutritional value coupled with high energy content. The same concept can be transferred to energy use, consuming high amounts of energy (calories) to provide a small amount of actual work. Consider a hair dryer, it uses a lot of electricity to evaporate and remove a small amount of moisture from somebody’s hair. In the food industry many processes remove unwanted water content as part of the process, this requires a lot of energy. However, few recapture the energy that goes into the evaporation of water. This is a huge waste of energy, but solutions are readily available.

Current Situation – The Case of Potato Chips

Potato chips (UK: crisps) frying is perhaps one of the easiest case to dive into to explain the situation. Up to 90 percent of the energy when producing potato chips goes into the frying of chips. Then more than one quarter of the energy that goes into frying is lost in the exhaust gases. This because water needs to be removed from the potato to become a chips.

When entering the fryer, a potato chip contains about 80 percent water. After processing the moisture content is typically only two percent. Ready-to-eat breakfast cereals from wheat, rice or maize go through a similar process and end up with a similarly low moisture content. This list is long, just consider what processed or pre-fried foods there are available in the supermarket.

Another source of empty calories is that the exhaust contains compounds, such as frying oil, Volatile Organic Compounds (VOC) and odor particles. These need to be removed before releasing the exhaust to the air. More often than not, this is done by using even more energy to burn off the unwanted particles in the exhaust.

How we can solve it!

The water naturally occurring in the ingredients is both the problem and the key. As the water is evaporated it exits the process as low pressure steam. The evaporation of water takes a lot of energy, but as the waste heat is carried in water it is also relatively easy to recover the energy by condensation the water.

Companies such as Centriair have solutions that can recover both the wasted heat in the exhaust and remove unwanted particles. In a brilliant setup that first separates oil for reuse or recycling, a second step condensates the steam in a heat exchanger to capture the waste heat, and finally remove the particles by an advanced UV-treatment.

Recovered heat can then be used to heat buildings, preheat and the dry different stages of food processing. If there is no use for heating, a Climeon Heat Power System can convert this low temperature waste heat into electricity. The electricity can then be used to offset internal electricity consumption. Reducing the need for grid-purchased electricity while improving the factory energy efficiency.

Installation works ongoing at Nodra AB

Work on installing two odor reduction units consisting of ColdOxTM and Active Carbon is ongoing at Nodra AB in Norrköping.

One unit of 10 000 m3 will take care of main ventilation ducts and main pumping station. We also installed a smaller unit for external sludge reception to take care of the odor that is vented out of the property. If you want your own ColdOx system, feel free to send us a message!

Merry Odour Free Christmas

We wish you an odour free Christmas and a happy New Year. With digital greetings this year, we hope that you will have the light shining upon you.

We can look back on a successful year in 2019 with bright prospects and successful projects and wish you a very productive 2020!

We welcome you to view our website to learn more about our innovative odour treatment systems.

Winning case of 56,000m3/hr of air treatment

In a challenging wet and muddy site at Blaise Farm in Offham, Kent, we were able to complete the assembly of two of our ColdOx systems, which combined will treat over 56,000m3/hr of air from the new waste reception and depacking building for this new Bioconstruct Biogas plant.


An amazing effort from the team of just an average of three people over four days. Again indicating how little site time our systems require for assembly, coming flat pack from Sweden. The system just awaits the finishing touches of ducting and power leading to it.

Growing Interest Over the Years


This year it is the 3rd time Centriair had been exhibiting at Pol-Eco systems. Besides all the interesting contacts we had made and positive feedback we had received from the visitors, one fact had made us very happy. The number of visitors to our stand had almost doubled compared to last year. The reason behind such success is not only the marketing and sales works that had been done over the years, but also the overall interest in the Polish market towards a better smell free environment. We are truly happy to witness a transformation in the society where odour free community is no longer a luxury, but rather a must.

Centriair exhibits in Japan for the first time


It has been a great honor to exhibit in Green Energy Week Osaka, Japan. Various industries such as Biogas, Waste Recycling, Waste-Water Treatment and even Food production had demonstrated a great interest towards our ColdOxTM system.


With recent tragedy in Fukushima, the country is rapidly transitioning to green energy. Considering the density of the population, the local authorities are very well aware of the smell problems and all the inconvenience they can lead to. At Centriair, we feel ready to take on a new market such as Japan since it shows tremendous commitment to removing odour and view us as “the modern innovation” company.

Challenging Odours within Biogas

In a modern world, Biogas has the potential to replace a large part of fossil fuel consumption. The possibility to generate energy from a wide variety of sources, environmental impact and profitability create an attractive ground for more and more companies to invest in the renewables industry. A good example of such a biogas plant is in Alvesta, Sweden. This plant specializes in turning slaughterhouse waste into an effective source of energy which powers up local houses and businesses in the surrounding area. While being one of the most strategically active plants in the municipality, Alvesta Biogas started appearing in the news, however not in the light they wanted to.


The process of generating slaughterhouse energy starts with the storage of the biomass in hygienization tanks. During this process the biomass is heated up in order to remove the liquid elements from the material as a pre-processing stage. As a result of that heat, a strong and irritating smell started to escape the tanks and the facility and spreading around the neighbourhood communities. This has caused a mass outrage with continuous complaints and threats from the municipality. The Biogas plant is now threatened to be shut down which could leave the area without energy supply and the workers unemployed.

When Scandinavian Centriair AB had received the request to help Alvesta Biogas solve their odour problem, nobody knew what was going to come. With extensive experience in the field of waste and biogas, Centriair experts assumed that the presence of H2S, Ammonia and other Volatile Organic Compounds (VOCs) would be the main elements causing the unpleasant smell. Since the customer has not done its odour measurements, Centriair team together with ÅF consultants had gathered samples which were later analysed in the lab. The results were shocking as the VOC concentration has showed 8 000 000 OU and 8 000 ppm H2S in the gas stream. To get an idea of how unpleasant that smell can get, we can say that at 0,000047 ppm of H2S a human nose can already detect the odour. According to the statement of ÅF consultants, this had been the highest VOC concentration that they have witnessed in Sweden.

The task was not easy since there are very few technologies in the market that can handle such extreme concentrations. For Centriair there was only one solution: DEO™ – catalytic conversion technology. DEO-100™ is a regenerative catalyst system for elimination of VOC and odour emissions from industrial processes. VOC and odour compounds are eliminated through patented mesh catalyst technology allowing for optimized and compact reactor geometry, large catalyst area and heat capacity. After the installation the smell seemed to disappear, and it became more bearable to stand around the plant. Knowing all the challenges of this application, Centriair team has done another round of sampling at the outlet of the DEO-100™ system. The test results indicated 99,6% reduction rate on VOCs and H2S compounds with less than 1 OU/M3 in the distance of 200 meters from the plant. This was a win-win situation for everyone.

In conclusion it is important to point out the necessity of odour treatment within Biogas plants. Alvesta Biogas is a good example of how ignorance of the problem could lead to sever consequences. It does not matter what a plant decides to use as a feedstock: it could be manure from animals, green waste from farms, sewage from the waste water treatment plants, it will all generate unpleasant smell for the staff and for the unlucky people living around biogas sites.