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Energy-saving exhaust air purification for industry

Energy-saving exhaust air purification for industry

oxytec builds state-of-the-art systems for exhaust air purification based on plasma and UV ozone. Compared to thermal post-combustion, we reduce energy consumption by up to 80% and CO₂ emissions by as much as 99%.

Greasy exhaust air from the food industry

The German Clean Air Act (TA Luft) requires that the impact on neighbouring residents be kept to a minimum. Our air purification systems, which have been tested by renowned institutes, neutralise organic components in the air we breathe, i.e. VOCs and many other pollutants and, in particular, odour-causing molecules. In this respect too, our process is superior to thermal post-combustion. Some of our plants are located in residential areas where residents do not notice the production process.

UV ozone technology can be used in processes such as frying, deep-frying, grilling, cooking and even smoking, and offers further advantages in these areas in particular:

Space requirements and maintenance costs are significantly lower. Our systems are usually located directly at the production site or on the roof. The fouling of exhaust air ducts is thus prevented at the source of the problem.

Examples of pollutants that we neutralise:

Clean Fryer Air

Our compact unit for cleaning hot, greasy exhaust air with a high VOC load has been specially developed for the food industry. Thanks to its vertical design and low weight, it is easy to install. As it is delivered prefabricated, it can be set up quickly on site.

Clean exhaust air from the pharmaceutical industry

The pharmaceutical industry must comply with strict emission limits for exhaust air. These values vary depending on the country and the type of pharmaceuticals produced. The emissions can include particles, volatile organic compounds (VOCs) or other pollutants.

As an alternative to previously used processes such as scrubbers and thermal oxidation, oxytec offers energy-saving and clean alternatives that are precisely customised to the individual pollutant mix, as we do not displace the pollutants, but convert them into harmless substances such as oxygen, water or minimal amounts of carbon dioxide.

If we know the pollutants emitted and the volume flow, we can already estimate whether we will solve the exhaust air problem. In order to dimension our system precisely, in most cases we first carry out a test with our test system on site. This involves optimising the arrangement of the cleaning stages and their ideal design under real conditions. This gives you the certainty that we will fall below your limit values.

We neutralise the typical pollutant problems of the pharmaceutical industry – and many others.

Exhaust air from the chemical industry

The chemical industry has very individualised pollutant problems in the production of basic materials. Our solutions are primarily suitable for organic loads in the exhaust air, but cover a very wide range. Even mixed pollutants in the volume flow are generally not a problem for our processes.

As the composition of the exhaust air is usually known exactly, we can quickly say whether an exhaust air problem can be solved by us or whether an existing system can be replaced by a system with lower energy consumption and smaller space requirements. We determine the exact design and dimensioning of the system after a test with our test system, which we carry out on site under real conditions.

Examples of pollutants for which our exhaust air solutions work very well:

Exhaust air from the paint and coating industry

Depending on the colour and process step, a variety of solvents are used in coatings, all of which are classified as pollutants. Whether it is paints, films, panels or the finishing of textiles, we have a solution for most solvents in order to fulfil the TA Luft.

The hazardous substances to be neutralised are known from the data sheets of the coating components. Accordingly, we can quickly tell you whether we can solve your pollutant problem. We use very different technologies for this: We combine scrubbers, electrostats, UV ozone, plasma and activated carbon in such a way that the long-term costs for your business are minimised.

To size our systems, we then carry out a one-week trial on site to determine the optimum configuration for your business.

Clean exhaust air is thus possible in many industries, in the production of paints and coating base materials, in all companies that work with paints and coatings, even in the production of coated fabrics in the textile industry.

Examples of pollutants for which our exhaust air solutions work very well:

Exhaust air from waste disposal and biogas plants

When disposing of plant and animal waste and when drying sewage sludge from municipal wastewater, odour problems primarily occur due to substances such as sulphuric acid, mercaptans or thiols. We can largely neutralise these odours. We can even control the aggressive vapours that decompose switch cabinets, for example.

In the case of industrially generated sewage sludge, it is important to know the processes of the discharging industry that is causing the pollution. Because we know the processes of many industries, we can also get the resulting municipal exhaust air problems under control.

Typical pollutants whose odour we eliminate:

Exhaust air from the automotive industry

Our options for cleaning exhaust air are just as varied as the production processes required to manufacture a car.

We have experience with the amine-containing exhaust air from the core foundry, with a wide variety of solvents from the field of coating and plastics production and we even remove pollutants from the exhaust air from battery recycling.

Clean technologies for clean air

Plasma

We have been using plasma air purification in practice for more than a decade. In co-operation with the OST – Ostschweizer Fachhochschule – we are constantly developing the technology further.

Plasma exhaust air purification can replace the thermal after-treatment practised up to now – burning with gas. Plasma technology is more effective, cleaner and, above all, significantly more cost-effective.

UV ozone

With this technology, we utilise a specific light spectrum that also occurs in sunlight. The light is able to break up organic molecules and thereby generate free radicals such as O₃. These in turn react with atoms bound in the pollutants to form harmless substances such as water, oxygen and carbon dioxide. We have decades of experience with UV ozone and use this technology in very different environments.

Scrubber

We primarily use this established technology in a complementary way, as the pollutant ultimately only passes into another medium. Scrubbers reduce the temperature, wash particles out of the volume flow and bind water-soluble substances.

Activated carbon

Activated carbon is an ideal filter, but when used solely to clean the air, it is quickly used up and then has to be replaced at great expense.

We primarily use activated carbon as a catalyser and to seal off our systems. Our UV ozone and plasma technology cleans the activated carbon at the same time, giving it a long service life. The aim is not to buy clean air with frequent maintenance and high costs.

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