Waterworks (6): the sand filter building – water drainage after rinsing
After aeration and rinsing of the filter, the impurities and the backwash go into the pipes and then into the desludger. The…

Liisa Matveinen is a professional traditional folk musician who has done her masters degree in Kantele playing and singing.
Kantele is a traditional Finnish and Karelian instrument which is played by plucking the strings. The amount of strings vary from small traditional 5-string versions to 40-string concert models.
Kantele is also mentioned in Finnish national epic Kalevala. In Kalevala the mage Väinämöinen makes the first Kantele from a jaw bone of a huge pike.
In this recording Matveinen is playing a 15-string Kantele called Kirjokansi. Made by luthier Jyrki Pölkki.
Sound & Photo: Antti Makkonen
After aeration and rinsing of the filter, the impurities and the backwash go into the pipes and then into the desludger. The…
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