WWS-RM Clayton Digesters Improvements and Rehabilitation

active / construction

The proposed Digesters Improvements and Rehabilitation project includes implementing needed improvements at the R.M. Clayton Water Reclamation Center to replace aging equipment and upgrade the anaerobic digestion process for improved performance, permit compliance, reliability and safety. R.M. Clayton sustained over $60 million damages from the September 2009 flood event that topped the current levees. The levees need to be raised in order to protect the facility from a similar event. The scope of the project is as follows: All four digesters to be cleaned, inspected and repaired where necessary The existing floating digester covers will be replaced with fixed covers based on condition The existing gas mixing systems will be replaced with more effective pump mixing systems for better process control and efficiency Replace both boilers with new equipment Replace heat exchangers with new equipment and controls (to be located in the existing headhouses) Provide a Boiler Building to house the new larger boiler system and avoid National Fire Protection Association (NFPA) building classification restrictions in the headhouses New prefabricated electrical buildings will be added to house the new electrical equipment and gear to avoid issues with NFPA building classification restrictions in the headhouses The levees need to be raised three feet The digester improvements are proposed to be completed in two separate phases of construction. Phase 1 includes cleaning and rehabilitating Digesters 200 and 250, as well as replacing the digester cover on Digester 200. The cover on Digester 250, which was replaced in 2008, would be inspected to ensure proper functionality and determine continued usage. Phase 1 also includes modifying the operating protocol to combine pump station and waste activated sludge, installing new pump mixing, and constructing a new electrical building. Justification Infrastructure Rehabilitation Improved operational efficiency Reduced energy requirements Resource recovery

High