%0 Journal Article
%T Investigation of Composition of Particle Size in Sediments of Stormwater Sedimentation Tank Nuos d , susidaran i  pavir ini  nuotek  nusodinimo talpose, granuliometrin s sud ties tyrimas
%A Daiva Lauˋytˋ
%A Regimantas Dauknys
%J Science 每 Future of Lithuania
%D 2009
%I Vilnius Gediminas Technical University
%R 10.3846/118
%X The main object for the storm water runoff treatment is to remove suspended solids before the storm water runoff is discharged into surface waters. Therefore the sedimentation tank is the most often used treatment facility. In order to optimise the sedimentation, the tendency of particle size distribution in bottom sediments must be known. Two similar size storm water runoff sedimentation tanks in Vilnius city were selected for the analysis of the particle size distribution in sediments. The composite samples of drained storm water runoff sediments were collected at the sedimentation tanks located in the districts of Verkiai and Karoliniskes on the 2nd of June, 2008. The analyses of grain size distribution were performed according the standard ISO/TS 17892-4:2004. The results showed that the particles with the particle size of 1每2 mm were obtained up to 10 m from the inlet and the particles with the size of 0,01每0,05 mm mainly were obtained close to the outlet of sedimentation tank. It is recommended to divide the sedimentation tank in two parts in order to get proper management of sediments: the particles that size is 1每10 mm could be managed as waste from grit chambers and particles of smaller size could be managed as primary sludge. Article in Lithuanian Vienas i  svarbiausi  pavir ini  nuotek  valymo tiksl  每 pa alinti skendin ias med iagas i  pavir ini  nuotek .  iuo tikslu da niausiai naudojamos  vairios nusodinimo talpos. Nusodinimo veiksmingumas jose apib迂dinamas pagal susidariusi  nuos d  granuliometrin  sud t .  iuo tikslu buvo pasirinkti du Vilniaus mieste esantys pavir ini  nuotek  valymo  renginiai: Karolini ki  ir Verki . Nustatyta nuos d  granuliometrin  sud tis parod , kad stambesn s dalel s (1每10 mm) nus do ar iau  t kio, t. y. 10 metr  atkarpoje nuo  t kio, o smulkesn s (0,001每1 mm) 每 ar iau i t kio. Straipsnis lietuvi  kalba
%U http://www.mla.vgtu.lt/index.php/mla/article/view/118