The N tram – the bell (recorded from the outside)
The bell in a historic N type tram car. The sound was recorded outside the car. The N type tramcars were the…
Museum of Municipal Engineering
The Thermal Waste Conversion Plant (6): the flue gas purification hall
The soundscape recorded in the flue gas purification hall. Combustion gases pass through a heat recovery steam generator, an emission treatment installation,…
The Thermal Waste Conversion Plant (5): power turbines
Sound recorded in front of a steam turbine that drives an electric power generator. The heat recovered from the exhaust gas is…
The Thermal Waste Conversion Plant (4): waste incineration
Sound recorded in front of the incineration chamber where waste is burned. Its thermal transformation consists of several phases. First, the waste…
The Thermal Waste Conversion Plant (3): crane cabin
The sound of crane operation which transfers waste from the bunker to the incineration zone. The recording was made in the crane…
The Thermal Waste Conversion Plant (2): washing garbage truck wheels
The sounds of a garbage truck passing through the car wash. Before leaving the plant, the garbage trucks are sent to a…
The Thermal Waste Conversion Plant (1): unloading garbage trucks
Sound recorded at the entrance to the hall where the waste is brought by garbage trucks. In the recording you can hear…
The sewage treatment plant (16): sludge dewatering – the mixer
Sounds recorded at the sludge dewatering mixer. Fermented sludge following biogas production goes there. The dewatered sludge contains about 25% dry matter…
The sewage treatment plant (15): sludge dewatering – the press
Sounds recorded at the sludge dewatering press. Fermented sludge following biogas production goes here. Dewatering is necessary so that the waste can…
The sewage treatment plant (14): sludge heating
Sounds recorded in the building with heat exchangers which heat the sludge to a temperature of about 38oC. Heated sludge goes to…
The sewage treatment plant (13): the secondary sludge tank
Sounds recorded at a secondary tank, where the sludge from mechanical and biological treatment is mixed. The waste will be used for…
The sewage treatment plant (12): mechanical sludge thickening
Soundscape recorded at the biological sludge thickening station. Sludge generated in the course of biological and mechanical treatment is used for biogas…
The sewage treatment plant (11): the treated sewage receiver
Sounds recorded at the place where treated sewage goes into the measuring chamber, just before it is discharged into the Drwina River.…
The sewage treatment plant (10): biological reactors
Soundscape recorded on the platform above the biological reactor. The plant has five biological reactors each with a capacity of 27,000 m3…
The sewage treatment plant (9): primary settling tanks
Sounds recorded above the primary settling tank. It is one of four round tanks in which the last stage of mechanical treatment…
The sewage treatment plant (8): the sand trap – sewage following sand removal
Sounds recorded at a site where sewage purified from sand goes towards the primary settling tanks. The recording was made at the…