PAR 1259 – DIGESTER COMPLEX REHABILITATION
Where: Commerce City, Colorado
Owner: Metro Wastewater Reclamation District
Engineer: Carollo Engineers
Contract Type: Design, Bid, Build
The PAR 1259 project was an extensive overhaul of the Digester Complex at the MWRD Robert Hite facility, and included coordinating and cleaning eleven digesters, Digester Feed Modifications including new valves and piping, Digester Withdrawal Modifications including replacement of existing snorkel valves with telescoping valves, Removal of existing, unused piping in the Digesters and galleries, replacement of existing valves throughout including gas valves and piping, new H2S resistant digester coating and concrete repairs on several digesters, replace two existing heat exchangers, three existing acid sludge recirculation pumps, flare structure sump pump, digester emergency pressure relief manholes repair of concrete around existing manholes, and miscellaneous repairs, valve installs and modifications to potable and PWC water piping, demolition of existing gas mixing system inside the digesters, site electrical demolition, relocation, and new installation and paving, grading and landscaping.