Modern cities today are facing three problems that for decades were addressed separately: growing amounts of waste, unstable energy sources, and increasing demands for cleaner air and heating. In the European Union, it has been clear for some time that these three challenges cannot be solved in isolation. This is why a concept was developed that connects them into a single system – Waste-to-Energy (WtE).
Simply put, Waste-to-Energy is a system in which the portion of waste that can no longer be recycled is used as a source of energy. Instead of ending up in landfills and polluting the environment for decades, this waste becomes fuel for the production of electricity and heat.
How Waste-to-Energy Actually Works
To understand WtE, it is important to break down a common misconception: not all waste goes into a WtE system. Before the energy process even begins, waste is sorted. Everything that can be recycled – metal, glass, paper, and part of plastics – is separated and returned to the production cycle. Only the remaining fraction, which has no other use, enters the WtE plant.
This remaining waste has an energy value similar to low-grade coal. Under controlled conditions and at very high temperatures, it is used to produce heat. That heat warms water and creates steam, which drives turbines, and the turbines generate electricity. At the same time, excess heat is used for district heating of homes, schools, hospitals, and industry.
The key difference compared to old industrial practices lies in control. Flue gases pass through multi-layer filters, chemical neutralizers, and continuous monitoring systems. Emissions are measured in real time and are subject to stricter regulations than most other energy facilities.
At the end of the process, the volume of waste is reduced by up to 90 percent. What remains is a stable material that, with additional treatment, can be used in construction or safely disposed of.
What This Looks Like in European Cities
In theory, Waste-to-Energy sounds like a technical solution. In practice, it has been part of everyday life for decades in some of the most well-organized European cities.
In Vienna, one of the most famous WtE plants is located practically within the urban area. Citizens do not see it as a threat, but as part of the energy infrastructure that heats their homes. In Copenhagen, the waste-to-energy facility is an architectural landmark and a public space – its roof even features a ski slope. Ljubljana, as a city from the region, has shown that high recycling rates can be perfectly combined with the energy use of waste.
What all these examples have in common is one thing: WtE is not hidden on the outskirts, because there is no reason to hide it. When the technology is properly designed and monitored, it becomes a normal part of the city.
Why Waste-to-Energy Is Not the Same as “Burning Waste”
In public discourse, the term “incinerator” is often used, but it carries a strong negative connotation. This stems from images of uncontrolled waste burning, illegal dumps, and improvised furnaces. Waste-to-Energy has little to do with that.
Open burning of waste means fire without control, without filters, and without oversight. WtE is a closed industrial process in which every cubic meter of air is controlled. The hall where waste is stored is under negative pressure, meaning air flows inward but not outward. Odors do not spread, and emissions are strictly limited.
For this reason, in the European Union WtE is not considered a threat, but an environmental measure that replaces far more harmful sources of pollution.
Myths Surrounding Waste-to-Energy
One of the most common myths is that WtE undermines recycling. In reality, the opposite is true. Countries that use the most energy from waste also have the highest recycling rates. The reason is simple: WtE only makes sense if the maximum amount of reusable material is first extracted from the waste stream.
Another myth is that WtE pollutes the air. Compared to thousands of individual chimneys burning coal and wood without any filtration, a single central facility equipped with modern filters has an incomparably smaller impact on air quality.
There is also a fear that WtE is outdated technology. On the contrary, WtE is continuously being improved and is part of European climate and energy strategies.
Emissions: Where Is the Real Problem?
When discussing air pollution in cities such as Sarajevo, Zenica, or Tuzla, it is crucial to understand that most harmful particles do not come from large industrial plants, but from individual heating systems. Thousands of small chimneys, without any filters, release pollution directly into residential areas.
Waste-to-Energy, on the other hand, centralizes emissions, filters them, and places them under constant supervision. As a result, emissions per unit of energy produced are significantly lower than those from decentralized burning of coal and wood.
This is precisely why European cities have linked WtE with district heating systems – to reduce the need for individual furnaces and improve air quality.
Why WtE Is a Foundation of Modern Energy Systems
Modern energy systems do not require only “green” sources, but stable ones. Solar and wind are essential, but they depend on weather conditions. Hydropower depends on precipitation. Gas and coal depend on markets and geopolitics.
Waste-to-Energy operates continuously, uses a local resource that already exists, and simultaneously addresses the waste problem. That is why it is not a replacement for renewable sources, but their support. It is the base around which a flexible and secure energy system can be built.
For countries like Bosnia and Herzegovina, which are simultaneously struggling with landfills, pollution, and energy insecurity, WtE is neither a luxury nor an experiment. It is a logical step toward a modern, European system of energy and waste management.
