Wastewater Treatment Plant - Biosolids Modernization

Upgrade the solids handing and solids treatment processes at the existing City of Sumner Wastewater Treatment Plant. Construct expansion to the existing Solids Handling Building, to include installation of a new indirect biosolids dryer, thermal fluid heaters, and all equipment encompassed in the biosolids dryer scope. Construct a temporary haul truck loading bay to facilitate demolition of existing facilities. Modify existing treatment systems, structures and processes to include replacement of existing thickened primary sludge pumps in the existing Scum Pump Building, demolish existing dissolved air floatation thickener and associated equipment in Equipment Building 2, and install a new rotary drum thickener and thickened waste activated sludge pumps, replace existing digested sludge pumps, replace existing thickening and dewatering polymer systems and replace existing air gap system in the thickening and dewatering polymer systems and replacement of existing air gap system in existing Solids Handling Building. Existing dewatered sludge conveyance system will also be reconfigured including rehabilitation of existing dewatered sludge storage hopper, modifications to existing conveyors (both temporary and permanent) and install new conveyors. Demolish existing waste gas burner and install new digester gas treatment system to include a hydrogen sulfide and moisture removal and digester gas compression, as well as install new enclosed waste gas flare. Replace existing submersible pumps in Plant Drain Pump Station No. 1 and the walls of existing centrate storage tank to be raised 6'. Replace internal recycle pumps and anoxic zone mixers in Aeration Basins in 1 and 2 and the effluent UV disinfection system. Install new and modify existing electrical power distribution and control equipment to support the new improvements, including the installation of new standby generator with subbase fuel tank in a sound attenuating enclosure. Construct a new hammerhead on State Street just outside the entrance tot he plant and new security fencing and access gates.