Stormwater treatment plant is designed to treat surface wastewater coming from residential areas and sites of enterprises from mineral and organic impurities of natural origin, coarse impurities, oil products, dissolved organic and mineral substances.
THE PRINCIPLE OF OPERATION
In stormwater treatment plant the stormwater passes through the following stages of treatment:
Stage 1 - sedimentation of large and ine mechanical impurities due to gravitational force. This stage of cleaning is carried out in a sand
separator. Sand separator is equipped with a sand sensor that signals that the bottom of the tank is silted up.
The sediment is pumped out by special transport or by portable pump.
Stage 2 - separation of oil products from stormwater due to the difference in density between oil products and water. This stage of cleaning is carried out in oil separator with coalescent unit. Oil separator is equipped with oil product level sensor, which signals the presence and size of oil ilm layer.
Stage 3 - sorption of oil products and retention of inely dispersed substances.
Stage 4 - disinfection of the treated surface runoff.
Stormwater treatment plants are manufactured both underground and aboveground types.
Underground type stormwater treatment plant is a block of cylindrical tanks made of composite polymer material of full factory readiness with shut-off and control valves and monitoring system.
Aboveground type stormwater treatment plant is a block of prismatic tanks made of metal of full factory readiness with shut-off and
control valves and monitoring system.