The Pennsylvania Department of Environmental Protection (DEP) intends to issue an air plan approval to Delta Thermo Energy A LLC of Allentown, Pa., for a 4-MW plant to be located in the city of Allentown, Lehigh County.
The facility will utilize municipal solid waste (MSW) and sludge from the city of Allentown’s Wastewater Treatment Plant as feedstock to produce a fuel to generate 4 MW (gross) of electricity for internal use and sale, said the DEP in a notice published in the Sept. 14 Pennsylvania Bulletin.
The facility will be designed with equipment capable of processing an average of 120 tons/day of Municipal Solid Waste (MSW) and 47 tons/day of sewage sludge as feedstock. Feedstock for the facility will be prepared onsite from MSW and sludge. The facility will use presorting of the MSW to increase the recovery of recyclables and state-of-the-art technology Resource Recovery System to convert feedstock to a renewable clean fuel that will be combusted using an improved Stoker-type combustor to generate steam, which in turn will power a turbine to generate a green, renewable source of electricity.
The facility will emit Clean Air Act-regulated pollutants, including PM10, NOx, CO, SO2, VOC, acid gases and metals. The emission control system consists of the following devices in series: twin cyclones for primary PM removal, selective catalytic reduction system with urea injection for NOx control, economizer, flue gas recirculation for NOx control, fabric filter for control of PM and metals control, wet packed tower with caustic solution recirculation for control of SO2, HCl, and HF, 2-stage carbon adsorption system for VOC and mercury control.