| 摘要 |
<p>A unit for wastewater treatment is provided. The unit (1) comprises a free- standing pre-assembled module on legs (2), a water inlet (4) and a water outlet (5), located in opposite sides of the unit (1). A screening compartment (6), containing a sieve (7) and a level transmitter (8) is arranged in the unit, and a grit trap compartment (13), containing a horizontal screw conveyor (14), and an inclined screw conveyor (15) is arranged downstream the screening compartment (6). Plates (22) are placed in said grit trap compartment (13) to create a vertical slit (23) after which there is a dosing point (24) for the metal salts. A polymer dosing zone (25) is located just before the outlet (26) of the grit trap compartment (13). A baffle (27) creates a gap (28) at the bottom of said grit trap compartment (13) and a weir (29) creates a horizontal barrier from the bottom of said grit trap compartment (13) followed by a mixing cavity (30) with a polymer dosing point (25) and an outlet (26). A method for operating the unit (1) is also provided.</p> |
