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Faydalı Bilgiler

Sludge Volume Index (SVI) (water) : This is a calculation which indicates the tendency of activated sludge solids (aerated solids) to thicken or to become concentrated during the sedimentation/thickening process. SVI is calculated in the following manner: (1) allow a mixed liquor sample from the aeration basin to settle for 30 minutes; (2) determine the suspended solids concentration for a sample of the same mixed liquor; (3) calculate SVI by dividing the measured (or observed) wet volume (mL/L) of the settled sludge by the dry weight concentration of MLSS in grams/L.
Concentration Polarization (water) : Œ A buildup of retained particles on the membrane surface due to dewatering of the feed closest to the membrane. The thickness of the concentration polarization layer is controlled by the flow velocity across the membrane. Used in corrosion studies to indicate a depletion of ions near an electrode. 3) The basis for chemical analysis by a polarograph.
Sürveyan : Gözetmen, Yapıyerinde yapılan işlere ve kullanılan gereçlere, işveren adına nezaret eden teknikere verilen isim.
İksa: Bir hendek veya temel çukuru kazılırken yandaki toprakları tutturmak için, yere yan yana çakılan ve kavramalarla birbirine tutturulan kalın tahtalarla kurulan düzen.



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