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 sound of doors opening and closing in a historic BT1 tow car.
The tow car, also called the tram locomotive, dates from the 1920s and was used to service freight on the tram network. After the end of World War II, the tram was used to clear up the rubble from Wrocław. Most likely, in the 1950s, the tram was modernised, and the fittings made compatible with the N type tramcars. The Miejskie Przedsiębiorstwo Komunikacyjne public transport company in Wrocław used it as a technical car (tug tramcar) until the 1970s. In the early 21st century, the tram was added to the collection of The Museum of Municipal Engineering and was restored in 2016. It is operational and occasionally may be seen in the streets of Krakow.
Sound recording: Marcin Dymiter aka Emiter
Photo: Iwo Wachowicz
Sounds recorded at the sludge dewatering press. Fermented sludge following biogas production goes here. Dewatering is necessary so that the waste can…
The weaving machine (dobby and jacquard machine) of the type G. A. Roscher from the 1920s was used to produce linen cloth…
Loom for straps at Göteborgs Remfabrik. Manufacture: Robert Hall & Sons, 1939. Göteborgs remfabrik originally produced straps for transmission systems. Recorded by…
This hammer is used to form the Wrought iron into bars. Sound cycle Sound 1: The hammer is lifted with an iron…