Northeast WRF Digester Repairs

Description: Draining and cleaning of the anaerobic digester. Lifting and removal of the anaerobic digester cover. Inspection of the digester cover (which includes the dome, the skirt, the cover s bottom), pipe supports, mixing nozzles, concrete corbels, digester gas pipe, sludge feed pipe. Final repairs will be determined after inspection has been completed and agreed upon by city and engineer. Repair of external roof plates: patching and repair of corroded areas as needed. Application of epoxy coating. Replacement of rollers as needed. Repair of the digester cover side skirt which include sandblasting, rewelding and recoating. Repair of concrete on inside of tank as indicated on drawings. Replacement of plug valves as indicated on drawings. Potential replacement of 16” (DIP), 12” (DIP), 8” (DIP), and 6” (DIP) piping as indicated on drawings. Potential replacement of 4" digester gas (SS) pipe as indicated on drawings.