WesTech provides innovative designs for custom digester covers using the latest structural standards while integrating ease of erection and economical value. WesTech offers three major structural designs: Steel Truss, Radial Beam, and DuoSphere™. Our Steel Truss and Radial Beam structures can be configured to fixed or buoyant configurations. Our DuoSphere Membrane Digester Cover is the most versatile cover available. The tank mount design provides an innovative and cost-effective solution for new and replacement covers.
Truss covers include steel plates welded to both the top and bottom of the trusses to form an attic space, which protects the structural members from corrosion and provides insulation for the sludge.
With no ceiling plates and 50% less field weld length than a truss cover, beam covers are a very economical choice for anaerobic digester covers.
The DuoSphere™ membrane digester cover is the most versatile cover available. The tank mount design provides an innovative and cost-effective solution for new and replacement covers.
Innovative designs incorporating a water launder or more advanced seal materials can overcome liquid level variation limitations. A conventional annular seal design relies on the sidesheets being submerged in the sludge to achieve a pressure seal and prevent odors from escaping.
Buoyant floating covers are in contact with the sludge, which reduces the exposed liquid surface area and prevents a large scum blanket.
Gasholder covers can be constructed using radial beams, trusses, or engineered textiles as in the case of the DuoSphere™ dual membrane covers.