Evoqua has provided customers with a robust and proven truss style steel digester cover for over 50 years. Now in addition to offering this well-known cover, Evoqua has developed a radial beam shell type steel digester cover in a fixed configuration for applications where sludge level variation is minimal.
The arch-rib cover consists of a center gas dome with integral compression ring, radial beams, cover plates, rim skirt assembly with integral thrust ring, hold-down brackets and accessories. The cover is supported on the top of the tank wall. The outer thrust ring is designed such that no excessive loading is transferred to the tank wall.