Lamellated separators

BEWA lamelled separators are used for separating pollutants and petrochemicals form rainwater and to keep them from flowing into surface waters. This type of separators are installed to treat sewage on industrial and storing areas, city centers, roads, motor ways, transport bases, car washing stands.

To increase separator performance it is recommended to install settlement tank before the separator.

 

Lamelled separator elements are installed in concrete manholes and are manufactured as a monolithic concrete element made of B-45 class concrete (minimal concrete class). They are equipped with a cover with a hatch hole closed with a cast-iron hatch cover adapted to expected bearing capacity. Depending on separators localization, two types of hatch covers are used: light and heavy hatch covers.

 

Superstructure of separators, in case of deep excavations, is consisted of concrete rings joined by elastomer seals.

 

Separator tanks’ dimensions and their weight are adapted for a wheel transport from the manufacturer’s premise to a installation destination.

 

Rainwater and industrial sewage contaminated with sand and oily substances (with bulk density of up to 0,95 g/cm3) flow through gravity rainwater sewage system into a settlement tank where solids with the size from 0,20 mm to 0,10 mm are separated from water. The settlement tank is the first treatment stage - it is in the tank where preliminary solids sedimentation takes place (particles of sludge are separated here as well).

 

Next, sewage flow gravitationally into a separator chamber, which is equipped with a coalescing insertion made of lamelled plates. Pollutants separation starts with flotation and sedimentation processes that take place during vertical sewage flow through lamelled sections (blinds). Oil micro drops, small dimensions of which prevent them from being separated from water, after proper sizes are formed they are separated from lamelled plates and when they are on the surface they are absorbed by sorbent cushions floating on the surface in the separator filter element chamber.