A visit to the water purifying station

An ordinary school day! Under the Erasmus + project “Future cities-smart and sustainable solutions”, we organised students and teachers to visit the new water treatment plant at the complex “Meden Rudnik”, where our school is located. We walked along the road. It was fun, the weather was sunny and predisposing. At the station, we were met by the station laboratory assistant, who showed us around and explained all the mechanisms of purification. The most interesting thing was that there was water purification with microorganisms. The station was built according to an Austrian project, of course with EU money. All processes are controlled by IT. The goal is to achieve a standard purity of the water that is discharged into the lake. Mandra. At the end of the station, what comes out is industrial water and dry matter, great for fertilizing. The strange thing is that these products are not available for use. This would contribute to the economic efficiency of the station. An engineer from the station explained the technologies used for the treatment. Purification processes are carried out in huge tanks located outdoors. We learned how not to pollute the water, not to dump certain products in the sewer network and how this interferes with the treatment. We heard and saw interesting things! This visit contributed to а certain extent to our environmental education, to how the municipality takes care of the purification and the ecological state of our city.

MAIN SOURCES OF POLLUTION IN BURGAS

  • Car traffic is the main source of air pollution in big cities. Significant amounts of nitrogen oxides and CO emissions are emitted by cars, as well as a large part of the amounts of particulate matter. Larger dust particles consist of dust suspended from roads and streets, while the exhaust gases of cars emit mainly fine dust particles. Between 80 and 90% of nitrogen oxide emissions are due to road traffic. In fact, car traffic is a source of air pollution all year round.
  • Domestic heating with wood and coal can be a significant source of emissions (fine dust particles, benzene) in the cold winter days. Not all residential complexes in Burgas are connected to a central heating system. In the city center, unheated residential complexes and in the surrounding villages, wood heating is the most common method of domestic heating. These sources can contribute a significant share of fine particulate matter emissions.
  • Lukoil Neftochim Burgas AD is the largest refinery in the country. Refineries can be a source of a wide range of pollutants (fine dust particles, hydrocarbons, nitrogen oxides, sulfur dioxide, hydrogen sulfide), both from production processes and from accidental emissions from leaks and from the tank farm.
  • Construction and repair activities are a source of pollution with dust and fine dust particles. Dust generated from construction sites or non-paved roads is re-distributed by air turbulence created by cars or wind and can become an environmental problem. The main part of the dust is coarse particles that are deposited near the roadway (within 10 to 20 meters). Less than 10 percent of the dust remains suspended as fine dust particles (PM10) and contributes to air pollution on a larger scale.
  • Industry – on the territory of Burgas operate several industrial enterprises, as they also contribute to air pollution, including fine dust particles.
  • The main air pollutants in urban areas are nitrogen oxides (especially NO2), originating from internal combustion engines and particulate matter, the source of which is domestic heating, exhaust gases from cars and particulate matter on the road surface.

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