Uponor Vault renser overvannet, Norrköping, Sweden
Pilotprosjekt for å rense overvann før det når Østersjøen
Med dimensjon på 3500 x 8000 mm, max. flow på 1600 l/s og optimert renseflow på 160 l/s, er dette den største Uponor Vault som er blitt installert i Sverige til nå. Dimensjon på inn- og utløp er 1000 mm.
Nodra har i tillegg installert tre Uponor Vault i dimensjon 3000 x 6000 mm i Norrköpings nye boligområde, Inre hamnen. Disse skal rense overvannet før det renner ut i Motala ström.
Prosjektfakta
Uponor engasjement
Uponor Vault no. 2 = 3000 x 6000 mm
Skreddersydde produkter på stedet
Tre-stegs prosess
Vault renser overvannet for forurensninger i tre steg:- Det første rensesteget består av en grov rist der man fanger opp grovere partikler, som løv, grener osv.
- Etter grovristen finnes det en sedimentlomme som samler opp sediment fra overvannet.
- Det siste steget består av filterrør – i dette tilfellet 12 stk – med Filtralite P. Antallet styres av hvilken max. flow anlegget skal ha. Vannet presses gjennom filtrene før det til slutt renner ut av anlegget og inn i vannforekomsten som skal motta overvannet.
“Den verste typen overvann er den såkalte 'first flush'. Det vil si det øverste laget på asfalten som følger med kraftig regn. I dette finnes blant annet tungmetaller og salter, som renner direkte ned i våre overvannskummer og deretter ut i elver og bekker. Vi ønsker at denne 'first flush' skal sette seg fast i filtrene," forklarer Helena Aspdahl, prosjektleder i Nodra AB.
"Dette er et pilotprosjekt for å undersøke renseeffekten til Vault ved å ta ut prøver av overvannet før og etter behandlingen. Når vi vet mer, kan vi bestemme om vi trenger å bytte til en annen type filter eller gjøre andre justeringer. Vi må også finne ut hvordan vi best kan vedlikeholde anlegget," sier Aspdahl.
Prosjektinformasjon
Prosjektinformasjon
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